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Kentbrooksite

A valid IMA mineral species

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Photos of Kentbrooksite (27)

Kentbrooksite Gallery Search Photos of Kentbrooksite

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Kentbrooksite

Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada

Kentbrooksite, etc.

Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada

Kentbrooksite

Lovchorrite Mine, Hackman Valley, Yukspor Mt, Khibiny Massif, Murmansk Oblast, Russia

Kentbrooksite

Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada

Kentbrooksite, etc.

Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada

Kentbrooksite

Lovchorrite Mine, Hackman Valley, Yukspor Mt, Khibiny Massif, Murmansk Oblast, Russia

Kentbrooksite

Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada

Kentbrooksite, etc.

Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada

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About KentbrooksiteHide

C. Kent Brooks

Formula:

(Na,REE)₁₅(Ca,REE)₆(Mn²⁺,Fe²⁺)₃Zr₃Nb[Si₂₅O₇₄]F₂ · 2H₂O

Colour:

Yellow-brown

Lustre:

Vitreous

Hardness:

5 - 6

Specific Gravity:

3.10

Crystal System:

Trigonal

Member of:

Eudialyte Group

Name:

Named by O. Johnsen, J.D. Grice, and R.A. Gault in 1998 in honor of Charles Kent Brooks (1943-), professor at the Geological Institute, University of Copenhagen. He was the leader of fourteen geological expeditions to the Kangerdlugssuaq area of east Greenland and collected the type specimen.

Type Locality:

ⓘ Kentbrooksite occurrence, Amdrup Firth, Kangerlussuaq Fjord, Sermersooq, Greenland

Eudialyte Group. "Nb-REE-Mn-F" end member (Johnsen et al., 1998), but REE does not dominate at any structural site. Difference from eudialyte sensu stricto is mainly in (1) dominance of ^VMn at the M2 site, (2) ^VINb presence at the M3 site, (3) dominance of F, (4) high amount of REE.

Element combination of kentbrooksite is unique among approved mineral species.

Unique IdentifiersHide

Mindat ID:

7132

Long-form identifier:

mindat:1:1:7132:7

GUID
(UUID V4):

03441aac-0eda-43ed-b5ca-02fb0644b2dc

IMA Classification of KentbrooksiteHide

IMA status:

Approved

IMA Formula:

(Na,REE)₁₅(Ca,REE)₆Mn₃Zr₃Nb(Si₂₅O₇₃)(O,OH,H₂O)₃(F,Cl)₂

First published:

1998

Type description reference:

Johnsen, O., Grice, J.D., Gault, R.A. (1998) Kentbrooksite from the Kangerdlugssuaq intrusion, East Greenland, a new Mn-REE-Nb-F end-member in a series within the eudialyte group: description and crystal structure. European Journal of Mineralogy: 10: 207-219.

Classification of KentbrooksiteHide

Strunz-mindat (2024):

9.CO.10

9 : SILICATES (Germanates)
C : Cyclosilicates
O : [Si₉O₂₇]₁₈- 9-membered rings

Dana 7th ed.:

64.1.1.3

Dana 8th ed.:

64.1.2.1

64 : CYCLOSILICATES Rings with Other Anions and Insular Silicate Groups
1 : Rings with Other Anions and Insular Silicate Groups with mixed ring types

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.

Symbol	Source	Reference
Ktb	IMA–CNMNC	Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43
Ktb	The Canadian Mineralogist (2019)	The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download

Pronunciation of KentbrooksiteHide

Pronunciation:

Play	Recorded by	Country
	Jolyon Ralph	United Kingdom

Physical Properties of KentbrooksiteHide

Lustre:

Vitreous

Transparency:

Transparent

Colour:

Yellow-brown

Streak:

White

Hardness:

5 - 6 on Mohs scale

Tenacity:

Brittle

Cleavage:

None Observed
No distinct cleavage reported.

Fracture:

Irregular/Uneven

Density:

3.10 g/cm³ (Measured) 3.08 g/cm³ (Calculated)

Optical Data of KentbrooksiteHide

Type:

Uniaxial (-)

RI values:

n_ω = 1.628 n_ε = 1.623

Max Birefringence:

δ = 0.005

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Surface Relief:

Moderate

Pleochroism:

Non-pleochroic

Chemistry of KentbrooksiteHide

Mindat Formula:

(Na,REE)₁₅(Ca,REE)₆(Mn²⁺,Fe²⁺)₃Zr₃Nb[Si₂₅O₇₄]F₂ · 2H₂O

Elements listed:

Ca, F, Fe, H, Mn, Na, Nb, O, Si, Zr - search for minerals with similar chemistry

Common Impurities:

REE,Y,K,Sr,Fe,Al,Ti,(Hf,Mg)

Crystallography of KentbrooksiteHide

Crystal System:

Trigonal

Class (H-M):

3m - Ditrigonal Pyramidal

Space Group:

R3m

Setting:

R3m

Cell Parameters:

a = 14.1686(2) Å, c = 30.0847((4) Å

Ratio:

a:c = 1 : 2.123

Unit Cell V:

5,230.34 Å³ (Calculated from Unit Cell)

Crystal StructureHide

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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure

ID	Species	Reference	Year	Locality	Temp (K)
0005609	Kentbrooksite	Johnsen O, Grice J D (1999) The crystal chemistry of the eudialyte group The Canadian Mineralogist 37 865-891	1999	Mont Saint-Hilaire, Rouville County, Quebec, Canada	293
0005610	Kentbrooksite	Johnsen O, Grice J D (1999) The crystal chemistry of the eudialyte group The Canadian Mineralogist 37 865-891	1999	Mont Saint-Hilaire, Rouville County, Quebec, Canada	293
0005619	Kentbrooksite	Johnsen O, Grice J D (1999) The crystal chemistry of the eudialyte group The Canadian Mineralogist 37 865-891	1999	Amdrup Fjord, Kangerdlugssuaq intrusion, Eastern Greenland	293
0005622	Kentbrooksite	Johnsen O, Grice J D (1999) The crystal chemistry of the eudialyte group The Canadian Mineralogist 37 865-891	1999	Mont Saint-Hilaire, Rouville County, Quebec, Canada	293
0005623	Kentbrooksite	Johnsen O, Grice J D (1999) The crystal chemistry of the eudialyte group The Canadian Mineralogist 37 865-891	1999	Locality: Burpala massif, Siberia, Russia	293
0006713	Kentbrooksite	Johnsen O, Grice J D, Gault R A (1998) Kentbrooksite from the Kangerdlugssuaq intrusion, East Greenland, a new Mn-REE-Nb-F end-member in a series within the eudialyte group: Description and crystal structure European Journal of Mineralogy 10 207-219	1998	Kangerdlugssuaq intrusion, East Greenland	293
0012363	Kentbrooksite	Rastsvetaeva R K, Khomyakov A P, Nekrasov Y V (1999) Crystal structure of a novel analog of eudialyte with R3 symmetry Crystallography Reports 44 765-769	1999	Alluaiv mountain, Lovozero massif, Kola Peninsula, Russia	293

CIF Raw Data - click here to close

data_global
_chemical_name_mineral 'Kentbrooksite'
loop_
_publ_author_name
'Johnsen O'
'Grice J D'
_journal_name_full 'The Canadian Mineralogist'
_journal_volume 37 
_journal_year 1999
_journal_page_first 865
_journal_page_last 891
_publ_section_title
;
 The crystal chemistry of the eudialyte group
 Sample: #3
 Note: additional sites with low but unreported occupancies excluded
;
_database_code_amcsd 0005609
_chemical_compound_source 'Mont Saint-Hilaire, Rouville County, Quebec, Canada'
_chemical_formula_sum 'Ca4.8 Mn2.34 Y.18 Ce.75 La.51 Fe1.47 Nb.78 Ta.07 Si24.93 Na13.08 Nd.15 K.24 Sr.06 Zr3 O76.47 Cl1.08 H.93'
_cell_length_a 14.2602
_cell_length_b 14.2602
_cell_length_c 29.980
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 5279.750
_exptl_crystal_density_diffrn      3.070
_symmetry_space_group_name_H-M 'R 3 m'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '2/3+x,1/3+y,1/3+z'
  '1/3+x,2/3+y,2/3+z'
  'x,x-y,z'
  '2/3+x,1/3+x-y,1/3+z'
  '1/3+x,2/3+x-y,2/3+z'
  '-y,-x,z'
  '2/3-y,1/3-x,1/3+z'
  '1/3-y,2/3-x,2/3+z'
  '-x+y,y,z'
  '2/3-x+y,1/3+y,1/3+z'
  '1/3-x+y,2/3+y,2/3+z'
  '-y,x-y,z'
  '2/3-y,1/3+x-y,1/3+z'
  '1/3-y,2/3+x-y,2/3+z'
  '-x+y,-x,z'
  '2/3-x+y,1/3-x,1/3+z'
  '1/3-x+y,2/3-x,2/3+z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_U_iso_or_equiv
CaM1   0.40560   0.07450   0.83250   0.80000   0.01500
MnM1   0.40560   0.07450   0.83250   0.15000   0.01500
YM1   0.40560   0.07450   0.83250   0.03000   0.01500
CeM1   0.40560   0.07450   0.83250   0.01000   0.01500
LaM1   0.40560   0.07450   0.83250   0.01000   0.01500
MnM25   0.18290   0.81710   0.82950   0.48000   0.01500
FeM25   0.18290   0.81710   0.82950   0.26000   0.01500
FeM24   0.17070   0.82930   0.83540   0.23000   0.03000
NbM3   0.00000   0.00000   0.12970   0.78000   0.01500
TaM3   0.00000   0.00000   0.12970   0.07000   0.01500
Si7   0.00000   0.00000   0.92080   0.84000   0.01000
Si7a   0.00000   0.00000   0.87980   0.09000   0.03000
Na1a   0.74820   0.25180   0.00340   0.46000   0.03500
Na1b   0.77610   0.22390   0.98610   0.46000   0.03500
Na2   0.56180   0.43820   0.67540   1.00000   0.02500
NaNa3a  -0.10380   0.10380   0.78610   0.97000   0.07500
CeNa3a  -0.10380   0.10380   0.78610   0.03000   0.07500
Na4   0.43440   0.56560   0.88090   0.50000   0.01500
CeNa4   0.43440   0.56560   0.88090   0.20000   0.01500
LaNa4   0.43440   0.56560   0.88090   0.15000   0.01500
NdNa4   0.43440   0.56560   0.88090   0.05000   0.01500
KNa4   0.43440   0.56560   0.88090   0.08000   0.01500
SrNa4   0.43440   0.56560   0.88090   0.02000   0.01500
Na5   0.26100   0.73900   0.68490   0.97000   0.06500
Zr   0.50340   0.49660   0.00000   1.00000   0.01000
Si1   0.73710   0.26290   0.74980   1.00000   0.01500
Si2   0.59680   0.40320   0.91320   1.00000   0.01500
Si3   0.45990   0.54010   0.75570   1.00000   0.01000
Si4   0.87700   0.12300   0.90710   1.00000   0.01000
Si5   0.05590   0.32550   0.73680   1.00000   0.01000
Si6   0.27590  -0.06240   0.93040   1.00000   0.01000
O1   0.60530   0.39470   0.75280   1.00000   0.02500
O2   0.77850   0.22150   0.78960   1.00000   0.03500
O3   0.76470   0.23530   0.70170   1.00000   0.03500
O4   0.72840   0.27160   0.90620   1.00000   0.03000
O5   0.54970   0.45030   0.87670   1.00000   0.03500
O6   0.90980   0.09020   0.63110   1.00000   0.03000
O7   0.39020  -0.03770   0.72630   1.00000   0.01500
O8   0.48360   0.51640   0.80500   1.00000   0.01500
O9   0.39550   0.60450   0.75110   1.00000   0.02500
O10   0.27670   0.05070   0.93970   1.00000   0.02500
O11   0.84520   0.15480   0.86120   1.00000   0.02000
O12   0.94060   0.05940   0.89820   1.00000   0.03500
O13   0.70250   0.09930   0.62570   1.00000   0.02000
O14   0.29350   0.92360   0.87830   1.00000   0.01500
O15   0.15980   0.84020   0.94850   1.00000   0.01500
O16   0.25160   0.22550   0.70680   1.00000   0.02000
O17   0.04360   0.29950   0.78910   1.00000   0.01500
O18   0.18020   0.81980   0.72060   1.00000   0.01500
O19   0.26930   0.73070   0.83090   0.90000   0.02000
O20   0.00000   0.00000   0.97380   0.84000   0.02000
ClX1a   0.00000   0.00000   0.26490   0.36000   0.03000
O-HX1a   0.00000   0.00000   0.26490   0.14000   0.03000
ClX1b   0.94860   0.89730   0.26130   0.12000   0.03000
O-HX1b   0.94860   0.89730   0.26130   0.05000   0.03000
ClX2a   0.00000   0.00000   0.75110   0.18000   0.03000
O-HX2a   0.00000   0.00000   0.75110   0.32000   0.03000
ClX2b   0.00000   0.00000   0.71040   0.18000   0.03000
O-HX2b   0.00000   0.00000   0.71040   0.32000   0.03000

X-Ray Powder DiffractionHide

Powder Diffraction Data:

d-spacing	Intensity
2.839 Å	(100)
2.961 Å	(91)
11.385 Å	(43)
7.088 Å	(41)
3.380 Å	(37)
4.295 Å	(34)
5.682 Å	(30)

Geological EnvironmentHide

Paragenetic Mode(s):

Paragenetic Mode	Earliest Age (Ga)
Stage 4b: Highly evolved igneous rocks	>3.0
35 : Ultra-alkali and agpaitic igneous rocks

Type Occurrence of KentbrooksiteHide

Type Locality:

ⓘ Kentbrooksite occurrence, Amdrup Firth, Kangerlussuaq Fjord, Sermersooq, Greenland

General Appearance of Type Material:

anhedral to subhedral aggregates

Reference:

Download:

http://rruff.info/rruff_1.0/uploads/EJM10_207.pdf

Synonyms of KentbrooksiteHide

IMA1996-023

Other Language Names for KentbrooksiteHide

German:Kentbrooksit

Russian:Кентбруксит

Spanish:Kentbrooksita

Relationship of Kentbrooksite to other SpeciesHide

Member of:

Eudialyte Group

Other Members of this group:

Alluaivite	Na₁₉(Ca,Mn)₆(Ti,Nb)₃Si₂₆O₇₄Cl · 2H₂O	Trig. 3m (3 2/m) : R3m
Amableite-(Ce)	Na₁₅[(Ce_1.5Na_1.5)Mn₃]Mn₂Zr₃◻Si[Si₂₄O₆₉(OH)₃](OH)₂ · H₂O	Trig. 3 : R3
Andrianovite	Na₁₂(K,Sr,Ce)₃Ca₆Mn₃Zr₃Nb(Si₂₅O₇₃)(O,H₂O,OH)₅	Trig. 3m : R3m
Aqualite	(H₃O)₈(Na,K,Sr)₅Ca₆Zr₃Si₂₆O₆₆(OH)₉Cl	Trig. 3 : R3
Carbokentbrooksite	(Na₃Na₃Na₃Na₃Na₃)Ca₆(^VMn²⁺₃)Zr₃[Si₃O₉]₂[Si₉O₂₇SiO][Si₉O₂₇Nb(OH)₃](CO₃)(H₂O)	Trig. 3m : R3m
Davinciite	Na₁₂K₃Ca₆Fe²⁺₃Zr₃(Si₂₆O₇₃OH)Cl₂	Trig. 3m : R3m
Dualite	Na₃₀(Ca,Na,Ce,Sr)₁₂(Na,Mn,Fe,Ti)₆Zr₃Ti₃Mn[Si₅₁O₁₄₄](OH,H₂O,Cl)₉	Trig. 3m : R3m
Eudialyte	Na₁₅Ca₆Fe₃Zr₃Si(Si₂₅O₇₃)(O,OH,H₂O)₃(Cl,OH)₂	Trig. 3m (3 2/m) : R3m
Feklichevite	Na₁₁Ca₉(Fe³⁺,Fe²⁺)₂Zr₃Nb[Si₂₅O₇₃](OH,H₂O,Cl,O)₅	Trig. 3m : R3m
Fengchengite	Na₁₂◻₃(Ca,Sr)₆Fe³⁺₃ Zr₃Si(Si₂₅O₇₃)(H₂O,OH)₃(OH,Cl)₂	Trig. 3m (3 2/m) : R3m
Ferrokentbrooksite	Na₁₅Ca₆(Fe,Mn)₃Zr₃NbSi₂₅O₇₃(O,OH,H₂O)₃Cl₂	Trig. 3m : R3m
Georgbarsanovite	Na₁₂(Mn,Sr,REE)₃Ca₆Fe²⁺₃Zr₃NbSi₂₅O₇₆Cl₂ · H₂O	Trig. 3m : R3m
Golyshevite	Na₁₀Ca₃Ca₆Zr₃Fe₂SiNb(Si₃O₉)₂(Si₉O₂₇)₂CO₃(OH)₃ · H₂O	Trig. 3m : R3m
Hydrorastsvetaevite	(Na₁₁(H₃O)₁₁K₆(H₂O)_1.5Sr)Ca₁₂Fe₃Na₂MnZr₆Si₅₂O₁₄₄(OH)_4.5Cl_3.5	Trig. 3m : R3m
Ikranite	(Na,H₃O)₁₅(Ca,Mn²⁺)₆Fe³⁺₂Zr₃[H_0-3Si₃O₉)₂(Si₉O₂₇)₂SiO]Cl · 2-3H₂O	Trig. 3m : R3m
Ilyukhinite	(H₃O,Na)₁₄Ca₆Mn₂Zr₃Si₂₆O₇₂(OH)₂ · 3H₂O	Trig. 3m : R3m
Johnsenite-(Ce)	Na₁₂Ce₃Ca₆Mn₃Zr₃WSi₂₅O₇₃(CO₃)(OH)₂	Trig. 3m : R3m
Khomyakovite	Na₁₂Sr₃Ca₆Fe₃Zr₃W[Si₂₅O₇₃](O,OH,H₂O)₃(OH,Cl)₂	Trig. 3m : R3m
Labyrinthite	(Na,K,Sr)₃₅Ca₁₂Fe₃Zr₆TiSi₅₁O₁₄₄(O,OH,H₂O)₉Cl₃	Trig. 3 : R3
Manganoeudialyte	Na₁₄Ca₆Mn₃Zr₃[Si₂₆O₇₂(OH)₂](H₂O,Cl,O,OH)₆	Trig. 3m : R3m
Manganokhomyakovite	Na₁₂Sr₃Ca₆Mn₃Zr₃W[Si₂₅O₇₃](O,OH,H₂O)₃(OH,Cl)₂	Trig. 3m : R3m
Mogovidite	Na₉(Ca,Na)₁₂Fe₂Zr₃Si₂₅O₇₂(CO₃) (OH)₄	Trig. 3m : R3m
Odikhinchaite	Na₉Sr₃[(H₂O)₂Na]Ca₆Mn₃Zr₃NbSi (Si₂₄O₇₂)O(OH)₃(CO₃) · H₂O	Trig. 3m : R3m
Oneillite	Na₁₅Ca₃Mn₃Fe²⁺₃Zr₃Nb(Si₂₅O₇₃)(O,OH,H₂O)₃(OH,Cl)₂	Trig. 3 : R3
Raslakite	Na₁₅Ca₃Fe²⁺₃(Na,Zr)₃Zr₃(Si,Nb)[(Si₃O₉)₂(Si₉O₂₇)₂SiO](OH,H₂O)₃(Cl,OH)	Trig. 3 : R3
Rastsvetaevite	Na₂₇K₈Ca₁₂Fe₃Zr₆Si₅₂O₁₄₄(O,OH,H₂O)₆Cl₂	Trig. 3m : R3m
Selsurtite	(H₃O)₁₂Na₃(Ca₃Mn₃)(Na₂Fe)Zr₃◻{Si(Si₃O₉)₂(Si₉O₂₇)Si₉O₂₄(OH)₃}(OH)Cl(H₂O)	Trig. 3 : R3
Sergevanite	Na₁₅(Ca₃Mn₃)(Na₂Fe)Zr₃Si₂₆O₇₂(OH)₃ · H₂O	Trig. 3 : R3
Siudaite	Na₈(Mn²⁺₂Na)Ca₆(Fe³⁺,Mn²⁺)₃Zr₃NbSi₂₄(Si,◻,Ti)O₇₄(OH)₂Cl · 5H₂O	Trig. 3m : R3m
Taseqite	Na₁₂Sr₃Ca₆Fe₃Zr₃Nb[(Si₃O₉)₂(Si₉O₂₇)₂SiO]Cl₂(O,OH,H₂O)₃	Trig. 3m : R3m
UM1971-22-SiO:CaClFeHMgMnNaNbZr	Na₁₂Ca₅(Ce,La,Y,Ca)Zr₃(Zr,Nb)(Fe,Mn)₃[Si₉O_24-26(OH)_1-3]₂[Si₃O₉]₂Cl	Trig. 3m : R3m
UM1990-78-SiO:CaClFeHKNaZr	(H₃O)₇(Na,K)₅(Ca,Sr,Mn)₆Zr₃[Si₃O₇(O,OH)₂]₂[Si₉O₂₃(O,OH)₄]2[SiNaFe(Zr,Ti,Al,Nb)◻]Cl_1.5(O,OH)	Trig. 3m : R3m
UM1990-79-SiO:CaClFeHMnNaNbREEZr	Na₁₄Ca₅(Mg,Ca,Mn)Zr₃(Si₃O₉)₂(Si₉O₂₇)₂(Si,Nb,Al,Zr)₂(Fe,Zr)₃(Mn,Na,Ce,La,Y)(Na,H₂O,K,Sr)(OH)_4-5(OH,Cl)
UM1990-80-SiO:CaFeHMnNaNbREEZr	Na₁₄Ca₄(Mn,Ca)₂Zr₃(Si₃O₉)₂(Si₉O₂₇)₂(Si,Nb,Al,Zr)₂(Fe,Mn,Al,Ti)₃(Na,Ce,La,Y,Mn)(Na,H₂O,K,Sr)(OH)_7-8
UM1998-21-SiO:CaCeClHMnNaZr	Na₁₆Ca₆(Mn,Ce)₃Zr₃(Si₃O₉)₂(Si₉O₂₇)₂(OH,Cl)₄ · nH₂O	Trig. 3m : R3m
UM1999-36-SiO:CaCeHMnNaNbSrZr	Na₁₇(Ca,Ce,Sr)₂Mn₃(Zr,Nb)₄Si₂₅O₇₃(O,OH,F,Cl)₅	Trig. 3 : R3
UM2000-66-SiO:CaClFeHMnNaNbSrZr	Na₁₂(Ca,Mn)₆(Sr,Na,K)₃(Fe,Mn)₃(Zr,Nb)₄Si₂₅O₆₆(OH,Cl)₁₁	Trig. 3m : R3m
UM2000-67-SiO:CaClFeHMnNaNbZr	Zr4(Ca,Na,Mn,Fe)6(Fe,Mn,Ti)3Na17Si25O75(Al,Nb,Ti)Cl(OH)4.H2O	Trig. 3m : R3m
UM2000-80- SiO:CaCeFFeHMnNaNbTiZr	Na₁₄(Na,Ca,Ce)(Mn,Ca,Ce)[Fe_1.55(Zr,Na)(◻,Ti,Nb)]Zr₃(Si,Al)(Si₃O₉)₂(Si₉O₂₇)₂(OH,O)₄(F ,Cl) · H₂O
UM2003-39-SiO:CaClFeHHfNaNbSrTaTiZr	Na₁₂(Na,K,Mn,Sr)₂Ca₅(Ca,Mn)(Zr,Hf)₃(Fe,◻,Ta)₃(Si,Nb,W)(Si,Al,Ti)Si₂₄O₇₂(OH,O)_3.5Cl · 1.2H₂O	Trig. 3m : R3m
UM2004-51-SiO:CaClFFeHNaNbTi	Na₁₆Ca₆(Fe,Mn)₃Zr₃(Ti,Nb)Si₂₆O₇₂FCl_0.5 · nH₂O	Trig. 3m : R3m
UM2005-36-SiO:AlBaCaClFeHKMnNaREESrTiZr	[(H₃O)_9.32Na_5.86K_0.53Ba_0.36Sr_0.15][Ca_5.22Sr_0.49Ce_0.16Mn_0.13][Zr_2.42Ti_0.54Hf_0.02Nb_0.02][Na_1.48(Fe
UM2005-37-SiO:AlBaCaClFeHKMnNaREESrTiZr	[(H₃O)_9.26Na_2.12K_1.20Ba_0.46Sr_0.48][Ca_5.76Ce_0.24][Zr2_.92Ti_0.08][Na_0.62(Fe_0.23Mn_0.11(H₂O)_0.34)][Si
UM2005-38-SiO:AlBaCaClFeHKMnNaNbREESrTiYZr	[(H₃O)_10.85Na_3.3Sr_0.48K_0.21Ce_0.2Y_0.1Ba_0.04][Ca_2.10Na_0.9][Ca_2.4Na_0.3Mn_0.3][Zr_2.97Hf_0.03][Fe_1.32
UM2005-39-SiO:AlBaCaClFeHKMnNaNbREESrTiYZr	[(H₃O)_11.61Na_3.0Sr_0.63Ce_0.22K_0.2Y_0.05Ba_0.03][Ca_2.25Na_0.75][Ca_2.4Mn0_.6][Zr_2.98Hf_0.02][Fe³⁺_0.66
UM2005-40-SiO:AlCaClFeHKMnNaNbREESrTiYZr	[(H₃O)_5.58Na5_.25Ce_0.63K_0.3Y_0.19Sr_0.05][Ca₃][Ca_1.71Mn_1.29][Zr_2.96Hf_0.04][(Fe³⁺_1.0Fe²⁺_0.35)(Fe³⁺
UM2005-41-SiO:BaCaFeHKMgMnNaNbREESrTiYZr	[(H₃O)_8.53Na_3.51Sr_0.55Ce_0.45Y_0.3Ba_0.15K_0.06][Ca_2.25Sr_0.45Na_0.3][Ca_2.4Mn_0.6][Zr_2.97Hf_0.03][(Mn_0.
UM2006-17-SiO:CaClFFeHMnNaZr	Na₁₅(Ca₃Mn₃)Zr₃(Fe,Zr)₃SiSi(Si₃O₉)₂(Si₉O₂₇)₂O₂(OH,F,Cl)₃ · 2H₂O
UM2006-18-SiO:CaClFFeHMnNaZr	Na₁₅Ca₃(Mn,Fe)₃Zr₃(Zr,Na)₃(Si,Nb)(S,Ti,Si)(Si₃O₉)₂(Si₉O₂₇)₂(O,OH)₅(Cl,F,H₂O)	Trig. 3 : R3
UM2006-28-SiO:CaHMnNaZr	Na₃₃Ca₁₂Zr₆Mn₃(Mn,Nb,Ti)₂Si₅₀O₁₃₂(O,OH)₁₂(OH,H₂O,Cl)₁₀
UM2010-06-SiO:CaFeHMnNaNbREETiZr	[Na,(H₃O)]₁₅(Ca₃Mn₃)Na₃Zr₃(Si,Ti)[Si₂₅O₇₂OH](OH)₂ · 2H₂O
Unnamed (Eudialyte 3248)	Na₂₉Ca₁₂Zr₆[Si₄₈O₁₃₂(O,OH)₁₂]{[Na]₄[Si]₂}{[Mn]₃[Mn,Nb,Ti]₂}(OH,H₂O,Cl)₁₀	Trig. 3m (3 2/m) : R3m
Unnamed (Hydrated Hydrous Na-Ca-Mn-Fe-Zr-Ti Silicate Chloride)	Na₃₇Ca₁₀Mn₂FeZr₆Si₅₀(Ti,Nb)₂O₁₄₄(OH)₅Cl₃ · H₂O	Trig. 3m : R3m
Unnamed (M4-vacant Sodium Calcium Manganese Zirconium Iron Silicon Hydroxyl Hydrated Eudialyte Group Species)	Na₁₃(Ca₃Mn₃)Zr₃(Fe, Mn)₃(◻)(Si)[Si₃O₉]₂[Si₉O₂₇]₂(O,OH,Cl)₃ · 2H₂O
Voronkovite	Na₁₅(Na,Ca,Ce)₃(Mn,Ca)₃Fe₃Zr₃Si₂₆O₇₂(OH,O)₄Cl · H₂O	Trig. 3 : R3
Zirsilite-(Ce)	Na_11-12(Ce,Na)₃Ca₆Mn₃Zr₃Nb(Si₁₉O₅₅)(Si₃O₉)₂(CO₃)(OH)₃ · H₂O	Trig. 3m : R3m

Common AssociatesHide

Associated Minerals Based on Photo Data:

18 photos of Kentbrooksite associated with Aegirine	NaFe³⁺Si₂O₆
10 photos of Kentbrooksite associated with Nepheline	Na₃K(Al₄Si₄O₁₆)
8 photos of Kentbrooksite associated with Parakeldyshite	Na₂ZrSi₂O₇
5 photos of Kentbrooksite associated with Fluorapatite	Ca₅(PO₄)₃F
4 photos of Kentbrooksite associated with Sodalite	Na₄(Si₃Al₃)O₁₂Cl
4 photos of Kentbrooksite associated with Analcime	Na(AlSi₂O₆) · H₂O
4 photos of Kentbrooksite associated with Albite	Na(AlSi₃O₈)
3 photos of Kentbrooksite associated with Petarasite	Na₅Zr₂(Si₆O₁₈)(Cl,OH) · 2H₂O
3 photos of Kentbrooksite associated with Feldspar Group
3 photos of Kentbrooksite associated with Tsepinite-Ca	Ca(Ti,Nb)₂(Si₄O₁₂)(OH,O)₂ · 3H₂O

Related Minerals - Strunz-mindat Grouping Hide

9.CO.	Odikhinchaite	Na₉Sr₃[(H₂O)₂Na]Ca₆Mn₃Zr₃NbSi (Si₂₄O₇₂)O(OH)₃(CO₃) · H₂O	Trig. 3m : R3m
9.CO.10	Alluaivite	Na₁₉(Ca,Mn)₆(Ti,Nb)₃Si₂₆O₇₄Cl · 2H₂O	Trig. 3m (3 2/m) : R3m
9.CO.10	Eudialyte	Na₁₅Ca₆Fe₃Zr₃Si(Si₂₅O₇₃)(O,OH,H₂O)₃(Cl,OH)₂	Trig. 3m (3 2/m) : R3m
9.CO.10	Ferrokentbrooksite	Na₁₅Ca₆(Fe,Mn)₃Zr₃NbSi₂₅O₇₃(O,OH,H₂O)₃Cl₂	Trig. 3m : R3m
9.CO.10	Khomyakovite	Na₁₂Sr₃Ca₆Fe₃Zr₃W[Si₂₅O₇₃](O,OH,H₂O)₃(OH,Cl)₂	Trig. 3m : R3m
9.CO.10	Manganokhomyakovite	Na₁₂Sr₃Ca₆Mn₃Zr₃W[Si₂₅O₇₃](O,OH,H₂O)₃(OH,Cl)₂	Trig. 3m : R3m
9.CO.10	Oneillite	Na₁₅Ca₃Mn₃Fe²⁺₃Zr₃Nb(Si₂₅O₇₃)(O,OH,H₂O)₃(OH,Cl)₂	Trig. 3 : R3
9.CO.10	Raslakite	Na₁₅Ca₃Fe²⁺₃(Na,Zr)₃Zr₃(Si,Nb)[(Si₃O₉)₂(Si₉O₂₇)₂SiO](OH,H₂O)₃(Cl,OH)	Trig. 3 : R3
9.CO.10	Feklichevite	Na₁₁Ca₉(Fe³⁺,Fe²⁺)₂Zr₃Nb[Si₂₅O₇₃](OH,H₂O,Cl,O)₅	Trig. 3m : R3m
9.CO.10	Carbokentbrooksite	(Na₃Na₃Na₃Na₃Na₃)Ca₆(^VMn²⁺₃)Zr₃[Si₃O₉]₂[Si₉O₂₇SiO][Si₉O₂₇Nb(OH)₃](CO₃)(H₂O)	Trig. 3m : R3m
9.CO.10	Zirsilite-(Ce)	Na_11-12(Ce,Na)₃Ca₆Mn₃Zr₃Nb(Si₁₉O₅₅)(Si₃O₉)₂(CO₃)(OH)₃ · H₂O	Trig. 3m : R3m
9.CO.10	Ikranite	(Na,H₃O)₁₅(Ca,Mn²⁺)₆Fe³⁺₂Zr₃[H_0-3Si₃O₉)₂(Si₉O₂₇)₂SiO]Cl · 2-3H₂O	Trig. 3m : R3m
9.CO.10	Taseqite	Na₁₂Sr₃Ca₆Fe₃Zr₃Nb[(Si₃O₉)₂(Si₉O₂₇)₂SiO]Cl₂(O,OH,H₂O)₃	Trig. 3m : R3m
9.CO.10	Rastsvetaevite	Na₂₇K₈Ca₁₂Fe₃Zr₆Si₅₂O₁₄₄(O,OH,H₂O)₆Cl₂	Trig. 3m : R3m
9.CO.10	Golyshevite	Na₁₀Ca₃Ca₆Zr₃Fe₂SiNb(Si₃O₉)₂(Si₉O₂₇)₂CO₃(OH)₃ · H₂O	Trig. 3m : R3m
9.CO.10	Labyrinthite	(Na,K,Sr)₃₅Ca₁₂Fe₃Zr₆TiSi₅₁O₁₄₄(O,OH,H₂O)₉Cl₃	Trig. 3 : R3
9.CO.10	Johnsenite-(Ce)	Na₁₂Ce₃Ca₆Mn₃Zr₃WSi₂₅O₇₃(CO₃)(OH)₂	Trig. 3m : R3m
9.CO.10	Mogovidite	Na₉(Ca,Na)₁₂Fe₂Zr₃Si₂₅O₇₂(CO₃) (OH)₄	Trig. 3m : R3m
9.CO.10	Georgbarsanovite	Na₁₂(Mn,Sr,REE)₃Ca₆Fe²⁺₃Zr₃NbSi₂₅O₇₆Cl₂ · H₂O	Trig. 3m : R3m
9.CO.10	Aqualite	(H₃O)₈(Na,K,Sr)₅Ca₆Zr₃Si₂₆O₆₆(OH)₉Cl	Trig. 3 : R3
9.CO.10	Dualite	Na₃₀(Ca,Na,Ce,Sr)₁₂(Na,Mn,Fe,Ti)₆Zr₃Ti₃Mn[Si₅₁O₁₄₄](OH,H₂O,Cl)₉	Trig. 3m : R3m
9.CO.10	Andrianovite	Na₁₂(K,Sr,Ce)₃Ca₆Mn₃Zr₃Nb(Si₂₅O₇₃)(O,H₂O,OH)₅	Trig. 3m : R3m
9.CO.10	Voronkovite	Na₁₅(Na,Ca,Ce)₃(Mn,Ca)₃Fe₃Zr₃Si₂₆O₇₂(OH,O)₄Cl · H₂O	Trig. 3 : R3
9.CO.10	UM1999-36-SiO:CaCeHMnNaNbSrZr	Na₁₇(Ca,Ce,Sr)₂Mn₃(Zr,Nb)₄Si₂₅O₇₃(O,OH,F,Cl)₅	Trig. 3 : R3
9.CO.10	UM2000-66-SiO:CaClFeHMnNaNbSrZr	Na₁₂(Ca,Mn)₆(Sr,Na,K)₃(Fe,Mn)₃(Zr,Nb)₄Si₂₅O₆₆(OH,Cl)₁₁	Trig. 3m : R3m
9.CO.10	Manganoeudialyte	Na₁₄Ca₆Mn₃Zr₃[Si₂₆O₇₂(OH)₂](H₂O,Cl,O,OH)₆	Trig. 3m : R3m
9.CO.10	UM1990-78-SiO:CaClFeHKNaZr	(H₃O)₇(Na,K)₅(Ca,Sr,Mn)₆Zr₃[Si₃O₇(O,OH)₂]₂[Si₉O₂₃(O,OH)₄]2[SiNaFe(Zr,Ti,Al,Nb)◻]Cl_1.5(O,OH)	Trig. 3m : R3m
9.CO.10	UM1990-79-SiO:CaClFeHMnNaNbREEZr	Na₁₄Ca₅(Mg,Ca,Mn)Zr₃(Si₃O₉)₂(Si₉O₂₇)₂(Si,Nb,Al,Zr)₂(Fe,Zr)₃(Mn,Na,Ce,La,Y)(Na,H₂O,K,Sr)(OH)_4-5(OH,Cl)
9.CO.10	UM1971-22-SiO:CaClFeHMgMnNaNbZr	Na₁₂Ca₅(Ce,La,Y,Ca)Zr₃(Zr,Nb)(Fe,Mn)₃[Si₉O_24-26(OH)_1-3]₂[Si₃O₉]₂Cl	Trig. 3m : R3m
9.CO.10	UM1998-21-SiO:CaCeClHMnNaZr	Na₁₆Ca₆(Mn,Ce)₃Zr₃(Si₃O₉)₂(Si₉O₂₇)₂(OH,Cl)₄ · nH₂O	Trig. 3m : R3m
9.CO.10	Fengchengite	Na₁₂◻₃(Ca,Sr)₆Fe³⁺₃ Zr₃Si(Si₂₅O₇₃)(H₂O,OH)₃(OH,Cl)₂	Trig. 3m (3 2/m) : R3m
9.CO.10	Davinciite	Na₁₂K₃Ca₆Fe²⁺₃Zr₃(Si₂₆O₇₃OH)Cl₂	Trig. 3m : R3m
9.CO.10	Ilyukhinite	(H₃O,Na)₁₄Ca₆Mn₂Zr₃Si₂₆O₇₂(OH)₂ · 3H₂O	Trig. 3m : R3m
9.CO.10	UM2004-51-SiO:CaClFFeHNaNbTi	Na₁₆Ca₆(Fe,Mn)₃Zr₃(Ti,Nb)Si₂₆O₇₂FCl_0.5 · nH₂O	Trig. 3m : R3m
9.CO.10	UM1990-80-SiO:CaFeHMnNaNbREEZr	Na₁₄Ca₄(Mn,Ca)₂Zr₃(Si₃O₉)₂(Si₉O₂₇)₂(Si,Nb,Al,Zr)₂(Fe,Mn,Al,Ti)₃(Na,Ce,La,Y,Mn)(Na,H₂O,K,Sr)(OH)_7-8
9.CO.10	UM2003-39-SiO:CaClFeHHfNaNbSrTaTiZr	Na₁₂(Na,K,Mn,Sr)₂Ca₅(Ca,Mn)(Zr,Hf)₃(Fe,◻,Ta)₃(Si,Nb,W)(Si,Al,Ti)Si₂₄O₇₂(OH,O)_3.5Cl · 1.2H₂O	Trig. 3m : R3m
9.CO.10	UM2006-17-SiO:CaClFFeHMnNaZr	Na₁₅(Ca₃Mn₃)Zr₃(Fe,Zr)₃SiSi(Si₃O₉)₂(Si₉O₂₇)₂O₂(OH,F,Cl)₃ · 2H₂O
9.CO.10	UM2006-18-SiO:CaClFFeHMnNaZr	Na₁₅Ca₃(Mn,Fe)₃Zr₃(Zr,Na)₃(Si,Nb)(S,Ti,Si)(Si₃O₉)₂(Si₉O₂₇)₂(O,OH)₅(Cl,F,H₂O)	Trig. 3 : R3
9.CO.10	UM2006-28-SiO:CaHMnNaZr	Na₃₃Ca₁₂Zr₆Mn₃(Mn,Nb,Ti)₂Si₅₀O₁₃₂(O,OH)₁₂(OH,H₂O,Cl)₁₀
9.CO.10	Unnamed (Eudialyte 3248)	Na₂₉Ca₁₂Zr₆[Si₄₈O₁₃₂(O,OH)₁₂]{[Na]₄[Si]₂}{[Mn]₃[Mn,Nb,Ti]₂}(OH,H₂O,Cl)₁₀	Trig. 3m (3 2/m) : R3m
9.CO.10	Hydrorastsvetaevite	(Na₁₁(H₃O)₁₁K₆(H₂O)_1.5Sr)Ca₁₂Fe₃Na₂MnZr₆Si₅₂O₁₄₄(OH)_4.5Cl_3.5	Trig. 3m : R3m
9.CO.10	Unnamed (Hydrated Hydrous Na-Ca-Mn-Fe-Zr-Ti Silicate Chloride)	Na₃₇Ca₁₀Mn₂FeZr₆Si₅₀(Ti,Nb)₂O₁₄₄(OH)₅Cl₃ · H₂O	Trig. 3m : R3m
9.CO.10	UM2010-06-SiO:CaFeHMnNaNbREETiZr	[Na,(H₃O)]₁₅(Ca₃Mn₃)Na₃Zr₃(Si,Ti)[Si₂₅O₇₂OH](OH)₂ · 2H₂O
9.CO.10	Siudaite	Na₈(Mn²⁺₂Na)Ca₆(Fe³⁺,Mn²⁺)₃Zr₃NbSi₂₄(Si,◻,Ti)O₇₄(OH)₂Cl · 5H₂O	Trig. 3m : R3m
9.CO.10	Sergevanite	Na₁₅(Ca₃Mn₃)(Na₂Fe)Zr₃Si₂₆O₇₂(OH)₃ · H₂O	Trig. 3 : R3
9.CO.10	Selsurtite	(H₃O)₁₂Na₃(Ca₃Mn₃)(Na₂Fe)Zr₃◻{Si(Si₃O₉)₂(Si₉O₂₇)Si₉O₂₄(OH)₃}(OH)Cl(H₂O)	Trig. 3 : R3
9.CO.10	Amableite-(Ce)	Na₁₅[(Ce_1.5Na_1.5)Mn₃]Mn₂Zr₃◻Si[Si₂₄O₆₉(OH)₃](OH)₂ · H₂O	Trig. 3 : R3

Other InformationHide

Electrical:

Pyroelectric.

Health Risks:

No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for KentbrooksiteHide

mindat.org URL:

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Raman and XRD data at RRUFF project

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References for KentbrooksiteHide

Reference List:

Jambor, J.L., Roberts, A.C. (1999) New mineral names. American Mineralogist: 84: 193-198.

Rastsvetaeva, R.K., Khomyakov, A.P., Nekrasov, Y.V. (1999) Crystal structure of a novel analog of eudialyte with R3 symmetry. Crystallography Reports: 44: 765-769.

Ekimenkova, I.A., Rastsvetaeva, R.K., Khomyakov, A.P. (2000) Crystal structure of the Fe,Cl-analogue of kentbrooksite. Doklady Chemistry: 370: 17-20.

Jambor, J.L., Roberts, A.C. (2001) New mineral names. American Mineralogist: 86: 939-942.

Johnsen, O., Ferraris, G., Gault, R. A., Grice, J. D., Kampf, A. R., Pekov, I. V. (2003) The nomenclature of eudialyte-group minerals. The Canadian Mineralogist, 41 (3) 785-794 doi:10.2113/gscanmin.41.3.785

Khomyakov, A.P., Nechelyustov, G.N., Rastsvetaeva, R.K. (2007) Aqualite, (H3O)8(Na,K,Sr)5Ca6Zr3Si26O66(OH)9Cl, a new eudialyte-group mineral from Inagli alkaline massif (Sakha-Yakutia,Russia), and the problem of oxonium in hydrated eudialytes. Proceedings of the Russian Mineralogical Society (Zapiski RMO): 136(2): 39-55.

Rastsvetaeva, R.K., Chukanov, N.V. (2012) Classification of eudialyte-group minerals. Geology of Ore Deposits: 54: 487-497.

(2023) Kentbrooksite. Handbook of Mineralogy. Mineralogical Society of America

Localities for KentbrooksiteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the

symbol to view information about a locality. The

symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed.

- This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality.

- Good crystals or important locality for species.

- World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). ~~Struck out~~ - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.


Brazil
Minas Gerais ⓘ Poços de Caldas	Färber (n.d.)
ⓘ Bortolan quarry	Vanrusselt (2023)
ⓘ Poços de Caldas alkaline complex	Atencio et al. (2000) +1 other reference

Canada
Northwest Territories North Slave Region Blachford Lake alkaline complex Thor Lake syenite complex ⓘ Nechalacho deposit	MÖLLER (2016)
Québec Montérégie La Vallée-du-Richelieu RCM Mont Saint-Hilaire ⓘ Poudrette quarry (De-Mix quarry; Demix quarry; Uni-Mix quarry; Carrière Mont Saint-Hilaire; MSH)	HORVÁTH et al. (2000)

Greenland (TL)
Sermersooq Kangerlussuaq Fjord Amdrup Firth ⓘ Kentbrooksite occurrence (TL)	Eur. J. Mineral. +1 other reference
ⓘ Citadellet	Distribution and mineralogy of rare earth element–Zr–Nb–Ta mineralisation within pegmatite sheets at Citadellet et al. (Trans. Inst. Min. Metall. B)

Norway
Telemark Porsgrunn Auenlandet Sagåsen ⓘ Sagåsen Quarry ?	Larsen et al. (2005) +1 other reference

Portugal
Azores São Miguel ⓘ Água de Pau Volcano	Samples collected by Luigi Chiappino ... +1 other reference

Russia
Murmansk Oblast Khibiny Massif ⓘ Koashva Mt	PEKOV et al. (2013)
Kukisvumchorr Mt East slope Tuliok River head ⓘ Unnamed pegmatite	Pavel.M. Kartashov (n.d.)
ⓘ Rischorr Mt	maurice.strahlen.org (n.d.)
ⓘ Yukspor Mt
Hackman Valley ⓘ Lovchorrite Mine	Neues Jahrbuch für Mineralogie (2003)
ⓘ Lovozero Massif	...
Lovozersky District Alluaiv Mountain ⓘ Umbozero mine	Pavel.M. Kartashov (n.d.)
ⓘ Umbozero North quarry	Pavel.M. Kartashov (n.d.)
ⓘ Karnasurt Mountain	Ivanyuk et al. (2015)
ⓘ Kedykverpakhk Mountain	Ivanyuk et al. (2015)

South Africa
North West Bojanala Platinum District Municipality Moses Kotane Local Municipality ⓘ Pilanesberg Alkaline Ring Complex	R. Liferovich - L. Horváth p.c. (2004) +1 other reference

Spain
Canary Islands Santa Cruz de Tenerife Province Tenerife ⓘ Centinela	Dill et al. (2023)
ⓘ Los Humilladeros	Dill et al. (2023)
ⓘ Sanidinite occurrence	"Christof Schäfer"
ⓘ Tajao	Dill et al. (2023)

Tajikistan
Districts of Republican Subordination ⓘ Dara-i-Pioz Massif	Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva: 132 (6) +1 other reference

USA
New Mexico Otero County Cornudas Mountains ⓘ Wind Mountain	Dr. W. Stoll (private communication 2001 & 2004)
Wisconsin Marathon County Wausau Intrusive Complex ⓘ Stettin pluton	Falster et al. (2014)

Kentbrooksite

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