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Manganoneptunite

A valid IMA mineral species - grandfathered
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About ManganoneptuniteHide

Formula:
KNa2Li(Mn2+)2Ti2[Si4O12]2
Colour:
Red
Lustre:
Vitreous
Hardness:
5 - 6
Specific Gravity:
3.17 - 3.20
Crystal System:
Monoclinic
Member of:
Name:
For being the manganese analogue of neptunite. The earlier name was mangan-neptunite, but it was changed to manganoneptunite by the IMA in 2008 (Burke 2008).
The Mn(II) analogue of neptunite.


Unique IdentifiersHide

Mindat ID:
2564
Long-form identifier:
mindat:1:1:2564:1
GUID
(UUID V4):
2afbe83f-2150-428b-99b4-1f5a5d11fe12

IMA Classification of ManganoneptuniteHide

Approved, 'Grandfathered' (first described prior to 1959)
IMA status notes:
Renamed by the IMA
IMA Formula:
KNa2LiMn2+2Ti2Si8O24
First published:
1923

Classification of ManganoneptuniteHide

9.EH.05

9 : SILICATES (Germanates)
E : Phyllosilicates
H : Transitional structures between phyllosilicate and other silicate units
Dana 7th ed.:
70.4.1.2
70.4.1.2

70 : INOSILICATES Column or Tube Structures
4 : Column or Tube Structures with linked chains forming cages
14.9.27

14 : Silicates not Containing Aluminum
9 : Silicates of Ti

Mineral SymbolsHide

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

SymbolSourceReference
MnnptIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Pronunciation of ManganoneptuniteHide

Pronunciation:
PlayRecorded byCountry
Jolyon RalphUnited Kingdom

Physical Properties of ManganoneptuniteHide

Vitreous
Transparency:
Translucent
Colour:
Red
Streak:
Brick-red, reddish brown.
Hardness:
5 - 6 on Mohs scale
Tenacity:
Brittle
Cleavage:
Distinct/Good
Distinct in two directions, intersecting at ~80°.
Fracture:
Irregular/Uneven, Conchoidal
Density:
3.17 - 3.20 g/cm3 (Measured)    3.26 g/cm3 (Calculated)

Optical Data of ManganoneptuniteHide

Type:
Biaxial (+)
RI values:
nα = 1.691 - 1.697 nβ = 1.693 - 1.700 nγ = 1.713 - 1.728
2V:
Measured: 31° to 36°, Calculated: 40°
Max Birefringence:
δ = 0.022 - 0.031
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
r > v strong
Optical Extinction:
Y = b; Z ∧ c = 16°-20°.
Pleochroism:
Strong
Comments:
X = light yellow; Y = orange or yellow-orange; Z = red-orange.
Comments:
Absorption: Z > Y > X.

Chemistry of ManganoneptuniteHide

Mindat Formula:
KNa2Li(Mn2+)2Ti2[Si4O12]2

Crystallography of ManganoneptuniteHide

Crystal System:
Monoclinic
Class (H-M):
m - Domatic
Space Group:
Bb
Setting:
Cc
Cell Parameters:
a = 16.4821(6) Å, b = 12.5195(4) Å, c = 10.0292(3) Å
β = 115.474(1)°
Ratio:
a:b:c = 1.317 : 1 : 0.801
Unit Cell V:
1868.31 ų
Morphology:
Prismatic crystals, elongated along [001]. Forms include {110}, {001}, {100}. Also {111}, {111} and rare {210}.
Twinning:
Contact twinning on {001}.

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0018809ManganoneptuniteBorisov S V, Klevtsova R F, Bakakin V V, Belov N V (1966) The crystal structure of neptunite Soviet Physics Crystallography 10 684-6891966Lovozero, Russia0293
0015717ManganoneptuniteZolotarev A A, Krivovichev S V, Yakovenchuk V N (2007) Refinement of the mangan-neptunite structure Zapiski Vserossijskogo Mineralogicheskogo Obshchestva 136 118-1232007Mt. Kaskasnyuncharr, the Khibiny alkaline pluton, Russia0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
2.485 Å(100)
1.506 Å(100)
1.483 Å(90)
2.170 Å(80)
1.924 Å(70)
2.841 Å(60)
2.948 Å(50)
Comments:
Lovozero massif, Russia.

Geological EnvironmentHide

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

Type Occurrence of ManganoneptuniteHide

General Appearance of Type Material:
Dark cherry-red crystalline granular aggregates, some of significant size and included with aegirine.
Place of Conservation of Type Material:
No designated type material.
Geological Setting of Type Material:
Pegmatite in nepheline syenite.
Associated Minerals at Type Locality:
Reference:
Kurbatov, S.M. (1923): Analyse d'une neptounite manganifère des Monts Chibines en Laponie russe. Comptes Rendus de l’Académie des Sciences de Russie, 1, 59-60.

Synonyms of ManganoneptuniteHide

Other Language Names for ManganoneptuniteHide

Simplified Chinese:锰柱星叶石
Traditional Chinese:錳柱星葉石

Relationship of Manganoneptunite to other SpeciesHide

Member of:
Other Members of this group:
MagnesioneptuniteKNa2Li(Mg)2Ti2[Si4O12]2Mon. 2/m : B2/b
NeptuniteKNa2Li(Fe2+)2Ti2[Si4O12]2Mon. m : Bb
RotherkopfiteKNa2Fe2+(Fe2+)2(Ti1.5Fe2+0.5)[Si4O12]2Mon. 2/m : B2/b
WatatsumiiteKNa2Li(Mn2+)2V4+2[Si4O12]2Mon. m : Bb
Forms a series with:

Common AssociatesHide

Associated Minerals Based on Photo Data:
65 photos of Manganoneptunite associated with SeranditeNaMn2+2Si3O8(OH)
58 photos of Manganoneptunite associated with AegirineNaFe3+Si2O6
25 photos of Manganoneptunite associated with CatapleiiteNa2Zr(Si3O9) · 2H2O
25 photos of Manganoneptunite associated with AlbiteNa(AlSi3O8)
24 photos of Manganoneptunite associated with Shkatulkalite Na2Nb2Na3Ti(Si2O7)2O2(FO)(H2O)4(H2O)3
22 photos of Manganoneptunite associated with NatroliteNa2Al2Si3O10 · 2H2O
21 photos of Manganoneptunite associated with MicroclineK(AlSi3O8)
20 photos of Manganoneptunite associated with AnalcimeNa(AlSi2O6) · H2O
19 photos of Manganoneptunite associated with UssingiteNa2AlSi3O8OH
18 photos of Manganoneptunite associated with Eudialyte Group[N(1)N(2)N(3)N(4)N(5)]3[M(1.1)M(1.2)]3[M(2.1)M(2.2)M(2.3)]3-6[M(3)M(4)]Z3[Si24O724X(1)X(2)

Related Minerals - Strunz-mindat GroupingHide

9.EH.05NeptuniteKNa2Li(Fe2+)2Ti2[Si4O12]2Mon. m : Bb
9.EH.05WatatsumiiteKNa2Li(Mn2+)2V4+2[Si4O12]2Mon. m : Bb
9.EH.05MagnesioneptuniteKNa2Li(Mg)2Ti2[Si4O12]2Mon. 2/m : B2/b
9.EH.05RotherkopfiteKNa2Fe2+(Fe2+)2(Ti1.5Fe2+0.5)[Si4O12]2Mon. 2/m : B2/b
9.EH.10GrumantiteNa(HSi2O5) · H2OOrth. mm2 : Fdd2
9.EH.15SarcoliteNa4Ca12Al8Si12O46(SiO4,PO4)(OH,H2O)4(CO3,Cl)Tet. 4/m : I4/m
9.EH.20UssingiteNa2AlSi3O8OHTric. 1 : P1
9.EH.25Leifite(Na,H2O)Na6[Be2Al2(Al,Si)Si15O39]F2Trig. 3m : P3m1
9.EH.25Telyushenkoite(Cs,Na,K)Na6[Be2Al3Si15O39]F2Trig. 3m (3 2/m) : P3 1m
9.EH.25EirikiteKNa6Be2(Si15Al3)O39F2Trig. 3m (3 2/m) : P3m1
9.EH.30NafertisiteNa3Fe2+10Ti2(Si6O17)2O2(OH)6F(H2O)2Mon. 2/m
9.EH.35VebleniteKNa(Fe2+5Fe3+4Mn7)Nb4(Si2O7)2(Si8O22)2O6(OH)10(H2O)3 Tric. 1 : P1

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 ManganoneptuniteHide

References for ManganoneptuniteHide

Localities for ManganoneptuniteHide

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
 
  • Québec
    • Montérégie
      • La Vallée-du-Richelieu RCM
        • Mont Saint-Hilaire
166-175. +2 other references
      • Lajemmerais RCM
        • Varennes & St-Amable
Horváth et al. (1998)
Horváth et al. (1998)
    • Montréal
      • Montréal-Est
Horváth collection
Greenland
 
  • Kujalleq
Petersen (2001)
Malawi
 
  • Southern Region
    • Zomba
Petersen et al. (1994)
Morocco
 
  • Drâa-Tafilalet Region
    • Midelt Province
      • Midelt Cercle
        • Aït Oufella Caïdat
          • Amersid
Khadem Allah (1993)
Namibia
 
  • Khomas Region
    • Windhoek Rural
      • Aris
Uwe Kolitsch (single-crystal X-ray diffraction + SEM-EDS) +6 other references
Russia
 
  • Buryatia
    • Mama River Basin
      • Maigunda River
Vladykin et al. (2017)
  • Murmansk Oblast
    • Khibiny Massif
      • Eveslogchorr Mt
        • Astrophyllite Stream
Pekov et al. (2005)
Arzamastsev et al. (2008)
      • Koashva Mt
American Mineralogist
Pekov et al. (2004)
        • Kirovskii apatite mine
Pekov et al. (2006)
Collection of the Fersman's ...
Kurbatov (1923) +1 other reference
Pavel.M. Kartashov (n.d.)
various added photos
    • Lovozersky District
[World of Stones 95:5-6 +1 other reference
        • Umbozero mine
Th. Witzke collection +1 other reference
Pavel.M. Kartashov (n.d.)
Pavel.M. Kartashov (n.d.)
Arzamastsev et al. (2008)
Kasatkin (2019)
Pekov (2005)
New Data on Minerals M. +1 other reference
Kasatkin (2019)
Pekov (1998) +2 other references
Pekov (1998)
      • Kuftnyun Mountain
Pekov (1998)
Pekov (1998) +2 other references
Ermolaeva et al. (2007)
      • Seidozero Lake
Yakovenchuk et al. (2007)
Semenov E.I. (1972)
Ermolaeva et al. (2007)
Spain
 
  • Canary Islands
    • Santa Cruz de Tenerife Province
      • Tenerife
        • Candelaria
          • Barranco Hondo
Dill et al. (2023)
USA
 
  • Montana
    • Meagher County
Mitchell (2000) +1 other reference
  • New Mexico
    • Colfax County
      • Springer
        • Point of Rocks Mesa (Pecks Mesa)
Rocks & Min.:60:229.
 
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