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Niobokupletskite

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About NiobokupletskiteHide

Formula:
K2NaMn2+7(Nb,Ti)(Si4O12)2O2(OH)4(O,F)
Colour:
Light yellow-brown, silvery brown.
Lustre:
Vitreous
Hardness:
3 - 4
Crystal System:
Triclinic
Name:
Named for its Nb content and its relation to kupletskite.

Classification of NiobokupletskiteHide

Approved
9.DC.05

9 : SILICATES (Germanates)
D : Inosilicates
C : Inosilicates with branched 2-periodic single chains; Si2O6 + 2SiO3 Si4O12

Physical Properties of NiobokupletskiteHide

Vitreous
Colour:
Light yellow-brown, silvery brown.
Hardness:
3 - 4 on Mohs scale

Optical Data of NiobokupletskiteHide

Type:
Biaxial (+)
RI values:
nα = 1.718 nβ = 1.733 nγ = 1.750
Max Birefringence:
δ = 0.032
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
r > v strong

Chemical Properties of NiobokupletskiteHide

Formula:
K2NaMn2+7(Nb,Ti)(Si4O12)2O2(OH)4(O,F)
IMA Formula:
K2NaMn7(Nb,Zr,Ti)2Si8O26(OH,O,F)5

Crystallography of NiobokupletskiteHide

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Setting:
P1
Cell Parameters:
a = 5.4303 Å, b = 11.924 Å, c = 11.747 Å
α = 112.927°, β = 94.750°, γ = 103.175°
Ratio:
a:b:c = 0.455 : 1 : 0.985
Unit Cell V:
669.5 ų

Type Occurrence of NiobokupletskiteHide

Synonyms of NiobokupletskiteHide

Other Language Names for NiobokupletskiteHide

Relationship of Niobokupletskite to other SpeciesHide

Other Members of this group:
Kupletskite(K,Na)3(Mn,Fe)7Ti2Si8O26(OH)4FTric.
Kupletskite-(Cs)Cs2NaMn2+7Ti2(Si4O12)2O2(OH)4FTric.

Common AssociatesHide

Associated Minerals Based on Photo Data:
Franconite8 photos of Niobokupletskite associated with Franconite on mindat.org.
Aegirine7 photos of Niobokupletskite associated with Aegirine on mindat.org.
Albite6 photos of Niobokupletskite associated with Albite on mindat.org.
Wurtzite2 photos of Niobokupletskite associated with Wurtzite on mindat.org.
Catapleiite1 photo of Niobokupletskite associated with Catapleiite on mindat.org.
Eudialyte1 photo of Niobokupletskite associated with Eudialyte on mindat.org.
Kupletskite1 photo of Niobokupletskite associated with Kupletskite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

9.DC.05AstrophylliteK2NaFe2+7Ti2Si8O28(OH)4FTric. 1 : P1
9.DC.05Hydroastrophyllite(H3O,K,Ca)3(Fe,Mn)5-65Ti2Si8(O,OH)31Tric.
9.DC.05Kupletskite(K,Na)3(Mn,Fe)7Ti2Si8O26(OH)4FTric.
9.DC.05LobanoviteK2Na(Fe2+4Mg2Na)Ti2(Si4O12)2O2(OH)4Mon. 2/m : B2/m
9.DC.05Niobophyllite(K,Na)3(Fe,Mn)6(Nb,Ti)2Si8(O,OH,F)31Tric.
9.DC.05ZircophylliteK2NaFe2+7Zr2(Si4O12)2O2(OH)4FTric.
9.DC.05Kupletskite-(Cs)Cs2NaMn2+7Ti2(Si4O12)2O2(OH)4FTric.
9.DC.05NalivkiniteLi2Na(Fe2+,Mn2+)7Ti2Si8O26(OH)4FTric. 1 : P1
9.DC.05SveinbergeiteCa(Fe2+6Fe3+)Ti2(Si4O12)2O2(OH)5(H2O)4Tric. 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.

References for NiobokupletskiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Piilonen, P.C., Lalonde, A.E., McDonald, A.M., and Gault, R.A. (2000) Niobokupletskite, a new astrophyllite-group mineral from Mont Saint-Hilaire, Quebec, Canada: description and crystal structure. Canadian Mineralogist: 38: 627–639.
Jambor, J.L. and Roberts, A.C. (2001) New mineral names. American Mineralogist: 86: 197-200.
Sokolova, E., Cámara, F., Hawthorne, F.C., and Ciriotti, M.E. (2017) The Astrophyllite supergroup: nomenclature and classification. Mineralogical Magazine: 81: 143-153.

Internet Links for NiobokupletskiteHide

Localities for NiobokupletskiteHide

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 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Canada (TL)
 
  • Québec
    • Montérégie
      • La Vallée-du-Richelieu RCM
        • Mont Saint-Hilaire
Piilonen, P.C., Lalonde, A.E., McDonald, A.M., and Gault, R.A. (2000) Niobokupletskite, a new astrophyllite-group mineral from Mont Saint-Hilaire, Quebec, Canada: description and crystal structure. Canadian Mineralogist: 38: 627–639.; Jambor, J.L. and Roberts, A.C. (2001) New mineral names. American Mineralogist: 86: 197-200.
Mineral and/or Locality  
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