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Epididymite

A valid IMA mineral species - grandfathered

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Photos of Epididymite (246)

Epididymite Gallery Search Photos of Epididymite

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Epididymite

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

Epididymite

Jahren Feldspar Quarry, Jahren pegmatite, Stavern, Larvik, Vestfold, Norway

Epididymite

Narssârssuk pegmatite, Narsaarsuk Plateau, Igaliku, Kujalleq, Greenland

Epididymite

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

Epididymite

Jahren Feldspar Quarry, Jahren pegmatite, Stavern, Larvik, Vestfold, Norway

Epididymite

Narssârssuk pegmatite, Narsaarsuk Plateau, Igaliku, Kujalleq, Greenland

Epididymite

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

Epididymite

Jahren Feldspar Quarry, Jahren pegmatite, Stavern, Larvik, Vestfold, Norway

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About EpididymiteHide

Formula:

Na₂Be₂Si₆O₁₅ · H₂O

Colour:

Colourless to white, rarely pink

Lustre:

Vitreous

Hardness:

5½

Specific Gravity:

2.548

Crystal System:

Orthorhombic

Name:

Derived from the Greek επ (near), and δίδνμος (twin) referring to the dimorphous relation with eudidymite.

Type Locality:

ⓘ Narssârssuk pegmatite, Narsaarsuk Plateau, Igaliku, Kujalleq, Greenland

Dimorph of:

Eudidymite

A late-stage mineral found in nepheline syenite pegmatites.

Unique IdentifiersHide

Mindat ID:

1388

Long-form identifier:

mindat:1:1:1388:4

GUID
(UUID V4):

b7fef349-db93-491f-8a15-5be4cc5b5d47

IMA Classification of EpididymiteHide

IMA status:

Approved, 'Grandfathered' (first described prior to 1959)

First published:

1893

Type description reference:

Flink, Gust. (1893) Om några mineral från Grönland. Geologiska Föreningen i Stockholm Förhandlingar, 15 (4) 195-208 doi:10.1080/11035899309442185

Classification of EpididymiteHide

Strunz-mindat (2024):

9.DG.55

9 : SILICATES (Germanates)
D : Inosilicates
G : Inosilicates with 3-periodic single and multiple chains

Dana 8th ed.:

66.3.1.4

66 : INOSILICATES Double-Width,Unbranched Chains,(W=2)
3 : Amphiboles - Ca-Na subgroup

Hey's CIM Ref.:

14.3.7

14 : Silicates not Containing Aluminum
3 : Silicates of Be

Mineral SymbolsHide

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

Symbol	Source	Reference
Edd	IMA–CNMNC	Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of EpididymiteHide

Lustre:

Vitreous

Transparency:

Transparent, Translucent

Comment:

Pearly on cleavage

Colour:

Colourless to white, rarely pink

Streak:

White

Hardness:

5½ on Mohs scale

Tenacity:

Brittle

Cleavage:

Perfect
Perfect on {001}, good on {010}

Fracture:

Irregular/Uneven, Conchoidal

Density:

2.548 g/cm³ (Measured)

Optical Data of EpididymiteHide

Type:

Biaxial (+)

RI values:

n_α = 1.544 n_β = 1.544 n_γ = 1.546

2V:

Measured: 22°

Max Birefringence:

δ = 0.002

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

Surface Relief:

Low

Dispersion:

weak

Chemistry of EpididymiteHide

Mindat Formula:

Na₂Be₂Si₆O₁₅ · H₂O

Elements listed:

Be, H, Na, O, Si - search for minerals with similar chemistry

Common Impurities:

Al,Fe,Mg,Ca,K

Crystallography of EpididymiteHide

Crystal System:

Orthorhombic

Class (H-M):

mmm (2/m 2/m 2/m) - Dipyramidal

Space Group:

Pnma

Cell Parameters:

a = 12.7334(4) Å, b = 13.6298(5) Å, c = 7.3467(3) Å

Ratio:

a:b:c = 0.934 : 1 : 0.539

Unit Cell V:

1275.04 Å³

Twinning:

Reticulated twins, trillings, pseudohexagonal trillings

Crystallographic forms of EpididymiteHide

Crystal Atlas:

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Epididymite no.5 - Goldschmidt (1913-1926)

Epididymite no.13 - Goldschmidt (1913-1926)

Epididymite no.14 - Goldschmidt (1913-1926)

Crystal StructureHide

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2x2x2 | 3x3x3 | 4x4x4

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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)
0000212	Epididymite	Robinson P D, Fang J H (1970) The crystal structure of epididymite American Mineralogist 55 1541-1549	1970	Narsarsuk, Greenland	293
0004614	Epididymite	Gatta G D, Rotiroti N, McIntyre G J, Guastoni A, Nestola F (2008) New insights into the crystal chemistry of epididymite and eudidymite from Malosa, Malawi: A single-crystal neutron diffraction study American Mineralogist 93 1158-1165	2008	Malosa, Malawi	293
0012437	Epididymite	Pobedimskaya E A, Belov N V (1959) The crystal structure of epididymite: a new type of infinite silicooxygenous chains Doklady Akademii Nauk SSSR 129 900-903	1959		293

CIF Raw Data - click here to close

data_global
_chemical_name_mineral 'Epididymite'
loop_
_publ_author_name
'Robinson P D'
'Fang J H'
_journal_name_full 'American Mineralogist'
_journal_volume 55 
_journal_year 1970
_journal_page_first 1541
_journal_page_last 1549
_publ_section_title
;
 The crystal structure of epididymite
;
_database_code_amcsd 0000212
_chemical_compound_source 'Narsarsuk, Greenland'
_chemical_formula_sum 'Na2 Be2 Si6 O16 H'
_cell_length_a 12.74
_cell_length_b 13.63
_cell_length_c 7.33
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 1272.827
_exptl_crystal_density_diffrn      2.555
_symmetry_space_group_name_H-M 'P n m a'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'x,1/2-y,z'
  '-x,1/2+y,-z'
  '1/2-x,1/2+y,1/2+z'
  '1/2+x,1/2-y,1/2-z'
  '1/2+x,y,1/2-z'
  '1/2-x,-y,1/2+z'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
Na   0.10300   0.06980   0.50140   0.02786
Be   0.49510   0.00020   0.34330   0.00633
Si1   0.15890   0.13800   0.01550   0.00380
Si2   0.34290   0.13660   0.73140   0.00380
Si3   0.33170   0.13780   0.30540   0.00507
O1   0.12070   0.25000   0.00050   0.01393
O2   0.21740   0.12340   0.20980   0.01140
O3   0.06030   0.06640   0.00670   0.00887
O4   0.23730   0.11420   0.84980   0.01267
O5   0.43450   0.06450   0.79070   0.01013
O6   0.37840   0.25000   0.76560   0.01013
O7   0.30480   0.12390   0.52040   0.00887
O8   0.37090   0.25000   0.26740   0.01013
O9   0.41510   0.06290   0.22560   0.01140
O-H10   0.05770   0.25000   0.48900   0.02913

Epitaxial Relationships of EpididymiteHide

Epitaxial Minerals:

Eudidymite

Na₂Be₂Si₆O₁₅ · H₂O

Epitaxy Comments:

Epitaxial intergrowths of epididymite and eudidymite are common

X-Ray Powder DiffractionHide

Powder Diffraction Data:

d-spacing	Intensity
3.37 Å	(10)
3.08 Å	(10)
2.96 Å	(10)
1.790 Å	(6)
1.634 Å	(6)
2.48 Å	(5)'
1.537 Å	(5)

Comments:

From Handbook of Mineralogy, specimen from Narssârssuk, Greenland

Geological EnvironmentHide

Paragenetic Mode(s):

Paragenetic Mode	Earliest Age (Ga)
Stage 4a: Earth’s earliest continental crust	>4.4-3.0
19 : Granitic intrusive rocks
Stage 4b: Highly evolved igneous rocks	>3.0
35 : Ultra-alkali and agpaitic igneous rocks

Type Occurrence of EpididymiteHide

Type Locality:

ⓘ Narssârssuk pegmatite, Narsaarsuk Plateau, Igaliku, Kujalleq, Greenland

Place of Conservation of Type Material:

No material connected with Flink's first investigation and descriptions has survived.

Chemical Analysis of Type Material:

SiO₂	73.74 %
BeO	10.56 %
Na₂O	12.88 %
H₂O	3.73 %
Total:	100.91 %

Reference:

Flink, G. (1893): Om några mineral från Grönland. Geologiska Föreningen i Stockholms Förhandlingar. 15, 195-208

Download:

http://rruff.info/rruff_1.0/uploads/GFSF15_201.pdf

Synonyms of EpididymiteHide

Epidymite

Other Language Names for EpididymiteHide

German:Epididymit
Epidymit

Russian:Эпидидимит

Simplified Chinese:斜方板晶石
斜板晶石
板晶石

Spanish:Epididymita
Epidymita

Traditional Chinese:斜方板晶石
斜板晶石
板晶石

Common AssociatesHide

Associated Minerals Based on Photo Data:

89 photos of Epididymite associated with Aegirine	NaFe³⁺Si₂O₆
45 photos of Epididymite associated with Albite	Na(AlSi₃O₈)
34 photos of Epididymite associated with Eudidymite	Na₂Be₂Si₆O₁₅ · H₂O
30 photos of Epididymite associated with Quartz	SiO₂
23 photos of Epididymite associated with Catapleiite	Na₂Zr(Si₃O₉) · 2H₂O
22 photos of Epididymite associated with Serandite	NaMn²⁺₂Si₃O₈(OH)
21 photos of Epididymite associated with Natrolite	Na₂Al₂Si₃O₁₀ · 2H₂O
20 photos of Epididymite associated with Smoky Quartz	SiO₂
17 photos of Epididymite associated with Microcline	K(AlSi₃O₈)
16 photos of Epididymite associated with Analcime	Na(AlSi₂O₆) · H₂O

Related Minerals - Strunz-mindat Grouping Hide

9.DG.	Calcinaksite	KNaCa(Si₄O₁₀) · H₂O	Tric. 1 : P1
9.DG.	Barrydawsonite-(Y)	Na_1.5Y_0.5CaSi₃O₈(OH)	Mon. 2/m : P2₁/b
9.DG.	Paratobermorite	Ca₄(Al_0.5Si_0.5)₂Si₄O₁₆(OH)(H₂O)₂ · (Ca · 3H₂O)	Mon. 2/m
9.DG.	Alvesite	NaKZrSi₆O₁₅ · 2H₂O	Orth. mmm (2/m 2/m 2/m)
9.DG.02	Steedeite	NaMn₂[Si₃BO₉](OH)₂	Tric. 1 : P1
9.DG.02	Nolzeite	NaMn₂[Si₃BO₉](OH)₂ · 2H₂O	Tric. 1 : P1
9.DG.05	Bustamite	CaMn²⁺(Si₂O₆)	Tric. 1 : P1
9.DG.05	Ferrobustamite	CaFe²⁺(Si₂O₆)	Tric. 1
9.DG.05	Pectolite	NaCa₂Si₃O₈(OH)	Tric. 1 : P1
9.DG.05	Serandite	NaMn²⁺₂Si₃O₈(OH)	Tric. 1 : P1
9.DG.05	Wollastonite	Ca₃(Si₃O₉)	Tric. 1 : P1
9.DG.05	Wollastonite-1A	CaSiO₃	Tric. 1 : P1
9.DG.05	Tanohataite	LiMn₂Si₃O₈(OH)	Tric. 1 : P1
9.DG.05	Schizolite	NaCaMnSi₃O₈(OH)	Tric. 1 : P1
9.DG.05	Murakamiite	LiCa₂Si₃O₈(OH)	Tric. 1 : P1
9.DG.05	Dalnegorskite	Ca₅Mn(Si₃O₉)₂	Tric. 1 : P1
9.DG.07	Cascandite	CaScSi₃O₈(OH)	Tric. 1
9.DG.08	Plombièrite	[Ca₄Si₆O₁₆(OH)₂ · 2H₂O] · (Ca · 5H₂O)	Orth.
9.DG.10	Clinotobermorite	[Ca₄Si₆O₁₇ · 2H₂O] · (Ca · 3H₂O)	Mon.
9.DG.10	Riversideite	Ca₅(HSi₃O₉)₂ · 2H₂O	Orth.
9.DG.10	Tobermorite	Ca₄Si₆O₁₇(H₂O)₂ · (Ca · 3H₂O)	Mon. 2 : P2₁
9.DG.12	Jusite	Na₂Ca₁₅Al₄Si₁₆O₅₄ · 17H₂O
9.DG.12	Kenotobermorite	Ca₄Si₆O₁₅(OH)₂(H₂O)₂ · 3H₂O	Mon.
9.DG.15	Foshagite	Ca₄(Si₃O₉)(OH)₂	Tric. 1 : P1
9.DG.20	Jennite	Ca₉(Si₃O₉)₂(OH)₈ · 8H₂O	Tric. 1 : P1
9.DG.20	Kamenevite	K₂TiSi₃O₉ · H₂O	Orth. 2 2 2 : P2₁ 2₁ 2₁
9.DG.25	Paraumbite	K₃Zr₂H(Si₃O₉)₂ · nH₂O	Orth. mm2
9.DG.25	Umbite	K₂(Zr,Ti)Si₃O₉ · H₂O	Orth. 2 2 2 : P2₁ 2₁ 2₁
9.DG.30	Sørensenite	Na₄SnBe₂Si₆O₁₆(OH)₄	Mon. 2/m : B2/b
9.DG.32	Escheite	Ca₂NaMnTi₅[Si₁₂O₃₄]O₂(OH)₃ · 12H₂O	Orth. mm2 : Ama2
9.DG.35	Xonotlite	Ca₆(Si₆O₁₇)(OH)₂	Mon. 2/m : B2/m
9.DG.40	Hillebrandite	Ca₂(SiO₃)(OH)₂	Orth. mmm (2/m 2/m 2/m) : Cmcm
9.DG.45	Zorite	Na₈(Ti,Nb)₅(Si₆O₁₇)₂(OH,O)₅ · 14H₂O	Orth.
9.DG.45	Chivruaiite	Ca₄(Ti,Nb)₅(Si₆O₁₇)₂(OH,O)₅ · 13-14H₂O	Orth. mmm (2/m 2/m 2/m) : Cmmm
9.DG.50	Haineaultite	(Na,Ca)₅Ca(Ti,Nb)₅(Si₆O₁₇)₂(OH,F)₈ · 5H₂O	Orth. 2 2 2 : C2 2 2
9.DG.60	Eudidymite	Na₂Be₂Si₆O₁₅ · H₂O	Mon. 2/m : B2/b
9.DG.65	Elpidite	Na₂ZrSi₆O₁₅ · 3H₂O	Orth.
9.DG.65	Patynite	NaKCa₄[Si₉O₂₃]	Tric. 1 : P1
9.DG.67	Whelanite	Cu²⁺₂Ca₆[Si₆O₁₇(OH)](CO₃)(OH)₃ · 2H₂O	Orth. mm2 : Pnn2
9.DG.70	Fenaksite	(K,Na)₄(Fe,Mn)₂(Si₄O₁₀)₂(OH,F)	Tric. 1 : P1
9.DG.70	Litidionite	CuNaKSi₄O₁₀	Tric. 1 : P1
9.DG.70	Manaksite	KNaMnSi₄O₁₀	Tric. 1 : P1
9.DG.70	Yusupovite	Na₂Zr(Si₆O₁₅) · 2.5H₂O	Mon. 2/m : B2/m
9.DG.70	Enricofrancoite	KNaCaSi₄O₁₀	Tric. 1 : P1
9.DG.75	Tinaksite	K₂Na(Ca,Mn²⁺)₂TiO[Si₇O₁₈(OH)]	Tric.
9.DG.75	Tokkoite	K₂Ca₄[Si₇O₁₈(OH)](OH,F)	Tric.
9.DG.75	Senkevichite	CsKNaCa₂TiO[Si₇O₁₈](OH)	Tric. 1 : P1
9.DG.80	Canasite	K₃Na₃Ca₅Si₁₂O₃₀(OH)₄	Mon. m : Bm
9.DG.80	Fluorcanasite	K₃Na₃Ca₅Si₁₂O₃₀F₄ · H₂O	Mon. m : Bm
9.DG.85	Miserite	K_1.5-x(Ca,Y,REE)₅(Si₆O₁₅)(Si₂O₇)(OH,F)₂ · yH₂O	Tric.
9.DG.90	Frankamenite	K₃Na₃Ca₅(Si₁₂O₃₀)(F,OH)₄ · H₂O	Tric. 1 : P1
9.DG.92	Charoite	(K,Sr)_15-16(Ca,Na)₃₂[Si₆O₁₁(O,OH)₆]₂[Si₁₂O₁₈(O,OH)₁₂]₂[Si₁₇O₂₅(O,OH)₁₈]₂(OH,F)₄ · ~3H₂O	Mon. 2/m : P2₁/m
9.DG.95	Yuksporite	K₄(Ca,Na)₁₄(Sr,Ba)₂(◻,Mn,Fe)(Ti,Nb)₄(O,OH)₄(Si₆O₁₇)₂(Si₂O₇)₃(H₂O,OH)₃	Mon. 2/m : P2₁/m
9.DG.97	Eveslogite	(Na,K,Ca,Sr,Ba)₄₈ [(Ti,Nb,Mn,Fe²⁺)₁₂Si₄₈O₁₄₄(OH)₁₂](F,OH,Cl)₁₄	Mon. 2/m : P2/m

Other InformationHide

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 EpididymiteHide

mindat.org URL:

https://www.mindat.org/min-1388.html
Please feel free to link to this page.

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External Links:

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Look for Epididymite on Wikipedia

Look for Epididymite on Mineralien Atlas

Raman and XRD data at RRUFF project

References and PDF downloads at RRUFF project

American Mineralogist Crystal Structure Database

Handbook of Mineralogy page PDF

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References for EpididymiteHide

Reference List:

Flink, Gust. (1893) Om några mineral från Grönland. Geologiska Föreningen i Stockholm Förhandlingar, 15 (4) 195-208 doi:10.1080/11035899309442185

Flink, G. (1901) Part I: On the Minerals from Narsarsuk on the Firth of Tunugdliarfik in Southern Greenland. Meddelelser om Grønland, 24. 7-180

Ito, T. (1934) The Structure of Epididymite (HNaBeSi₃O₈). Zeitschrift für Kristallographie - Crystalline Materials, 88 (1) 142-149 doi:10.1524/zkri.1934.88.1.142

ROBINSON, P.D. & FANG, J.H. (1970): The crystal structure of epididymite. American Mineralogist 55, 1541-1549.

Fang, J. H., Robinson, Paul D., Ohya, Y. (1972) Redetermination of the crystal structure of eudidymite and its dimorphic relationship to epididylnite. American Mineralogist, 57 (9-10) 1345-1354

Petersen, O. V., Medenbach, O., Bollhorn, J. (1997) Epididymite twins Contribution to the mineralogy of Ilímaussaq, No. 99. Neues Jahrbuch für Mineralogie - Monatshefte, 1997 (5) 221-228 doi:10.1127/njmm/1997/1997/221

Petersen, Ole V., Johnsen, Ole (2005) Mineral species first described from Greenland - Special Publication No. 8. The Canadian Mineralogist. p.1-184.

Gatta, G. D., Rotiroti, N., McIntyre, G.J., Guastoni, A., Nestola, F. (2008) New insights into the crystal chemistry of epididymite and eudidymite from Malosa, Malawi: A single-crystal neutron diffraction study. American Mineralogist, 93 (7) 1158-1165 doi:10.2138/am.2008.2965

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

Localities for EpididymiteHide

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.


Canada
Newfoundland and Labrador Labrador ⓘ Seal Lake alkaline complex (Letitia Lake)
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)	166-175. +5 other references
Lajemmerais RCM Varennes & St-Amable ⓘ Saint-Amable sill	Horváth et al. (1998)
ⓘ Demix-Varennes quarry	Horváth et al. (1998)

Czech Republic
Vysočina Region Žďár nad Sázavou District Věžná ⓘ Věžná I pegmatite	www.cseg.ca/conferences/2000/556.PDF. +2 other references
ⓘ Věžná II pegmatite	Mineralogical Magazine 1963 33 : 450-457 +2 other references

Greenland (TL)
Kujalleq Igaliku Narsaarsuk Plateau ⓘ Narssârssuk pegmatite (TL)	Flink (1893) +2 other references
ⓘ Ilímaussaq complex	Petersen (2001)
ⓘ Mount Nakkaalaaq	Bohse et al. (2001)
ⓘ Taseq Slope	Bohse et al. (2001)

Malawi
Southern Region ⓘ Machinga	Jordi Fabre
Zomba ⓘ Mount Malosa	American Mineralogist +4 other references

Norway
Telemark Porsgrunn Auenlandet Sagåsen ⓘ Saga 1 Quarry	Engvoldsen et al. (1991)
ⓘ Sagåsen Quarry	Larsen et al. (2005)
ⓘ Torbjørnsås Quarry	Engvoldsen et al. (1991)
Langangen Kokkersvold - Blåfjell E18 roadcuts ⓘ Blåfjell (E18 roadcuts)	Raade et al. (1983)
ⓘ Chiavennite dike	Raade et al. (1983)
ⓘ Rønningen E 18 roadcuts	Engvoldsen et al. (1991)
Siktesøya ⓘ Brønnebukta	Larsen et al. (1991)
ⓘ Tangane	Larsen et al. (2010)
Slevolden ⓘ E18 roadcuts	Burvald (1993)
Vestfold Larvik Brunlanes ⓘ Bakkane Quarry	Raade et al. (1983)
ⓘ Eikaholmen	Engvoldsen et al. (1991)
Hedrum Lågendalen ⓘ Bratthagen 1	Engvoldsen et al. (1991)
ⓘ Hedrum Quarry	Engvoldsen et al. (1991)
Malerød ⓘ Midtfjellet Quarry	Andresen (2011)
ⓘ Vardåsen Quarry	Berge (1993) +1 other reference
Stavern (Fredriksvärn) Fuglevika ⓘ Fuglevika Feldspar Prospect	Kristiansen (2005)
Jahren pegmatite ⓘ Jahrehagen cottage grounds	Andresen et al. (2018)
ⓘ Jahren Feldspar Quarry (Jaren Feldspar Quarry)	Engvoldsen et al. (1991)
ⓘ RV 301 Helgeroaveien roadcut	Larsen (2021)
Tvedalen ⓘ Almenningen Quarry (Treschow-Fritzøe Quarry)	Engvoldsen et al. (1991)
ⓘ Askedalsbotn Quarry	Larsen et al. (2010)
ⓘ Heia Quarry	Engvoldsen et al. (1991)
ⓘ Johs Nilsens Quarry	Larsen (2016)
ⓘ Norwegian Pearl Quarry	Larsen et al. (2010)
ⓘ Østskogen Quarry	Nordrum (2007)
ⓘ Røyås Quarry	Larsen et al. (2010)
ⓘ Saga Pearl Quarry	Engvoldsen et al. (1991) +1 other reference
ⓘ Tuften	Engvoldsen et al. (1991)
ⓘ A/S Granit Quarry	Nordrum (2008) +1 other reference
ⓘ Vevja Quarry	Åsheim +3 other references
Vesle Arøya ⓘ Eudidymite-Epididymite locality	Flink (1899) +2 other references
Sandefjord Haneholmveien ⓘ Virikkollen	Larsen et al. (2012)
Østerøya ⓘ Eian	Berge et al. (2002)
Vesterøya ⓘ Buer	Berge et al. (2011)
ⓘ Buerskogen	Larsen et al. (2013)
ⓘ Husebyåsen prospect	Engvoldsen et al. (1991) +1 other reference
ⓘ Kariåsen	Engvoldsen et al. (1991)
ⓘ Rambergåsen	Knut Edvard Larsen (2023)
ⓘ Vøra	Berge (1978)
Viken Lunner ⓘ Gjerdingselva	Raade et al. (1982)

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

Russia
Aldan Shield Chara and Tokko Rivers Confluence ⓘ Murunskii Massif	[Lapis 1993:4 p.13-20]
ⓘ Kedrovyi alkaline massif	Konev et al. (1996)
Murmansk Oblast Khibiny Massif ⓘ Aykuayvenchorr Mt. (Aikuaivenchorr Mt.; Aikuaiventchorr Mt.)	[World of Stones 95:5-6
ⓘ Eveslogchorr Mt	World of Stones 95:5-6 +2 other references
Astrophyllite Stream ⓘ Pegmatite	Pekov et al. (2005)
ⓘ IGC Stop 4-2	Arzamastsev et al. (2008)
ⓘ Vein No. 3	Men'shikov (2006)
ⓘ Khibinpakhkchorr Mountain	Azarova et al. (2009)
Kukisvumchorr Mt ⓘ Kirovskii apatite mine	Cámara et al. (2013) +1 other reference
ⓘ Hilairitovoye pegmatite	Pekov (2003)
Kovdorsky District ⓘ Kovdor Massif	Mikhailova et al. (2015)
Lovozersky District ⓘ Alluaiv Mountain	Yakovenchuk et al. (2010)
Umbozero mine ⓘ Shomiokitovoe pegmatite	Pekov et al. (1999) +1 other reference
ⓘ Apuaiv Mountain	Sorokhtina N.V. et al. (2004)
ⓘ Karnasurt Mountain	Pekov (1998) +1 other reference
ⓘ Hackmanite Stock	Pekov (1998)
ⓘ Natrolite Stock	New Data on Minerals M. +2 other references
ⓘ Kitknyun Mountain	Ivanyuk et al. (2006)
Kuftnyun Mountain ⓘ Pegmatite No. 19	Pekov (1998)
ⓘ Kuivchorr Mountain	[World of Stones 95:5-6
ⓘ Malyi Punkaruaiv Mountain	Yakovenchuk et al. (2011)
ⓘ Selsurt Mountain	Pekov (2003)
ⓘ Sengischorr Mountain	Tom Loomis specimen +1 other reference
Tuva Sangilen Upland ⓘ Korgeredaba alkaline massif	Kapustin et al. (1965)

Spain
Canary Islands Santa Cruz de Tenerife Province Tenerife ⓘ Alcala	Dill et al. (2023)
ⓘ La Mareta	Dill et al. (2023)
ⓘ Playa de San Juan	Dill et al. (2023)
ⓘ Poris de Abona	Dill et al. (2023)
Santiago del Teide ⓘ Puerto de Santiago	Dill et al. (2023)

Tajikistan
Districts of Republican Subordination ⓘ Dara-i-Pioz Massif	Pautov (2003)

USA
Massachusetts Norfolk County ⓘ Quincy
New Mexico Otero County Cornudas Mountains ⓘ Wind Mountain	XRD Laszlo Horvath collection specimen

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