Kupletskite Mineral Data + Say KUPLETSKITE

General Kupletskite Information
Help on Chemical Formula: Chemical Formula: K2Na(Mn,Fe++)7(Ti,Nb)2Si8O26(OH)4F
Help on Composition: Composition: Molecular Weight = 1,337.34 gm
   Potassium   6.58 %  K     7.92 % K2O
   Sodium      1.29 %  Na    1.74 % Na2O
   Titanium    5.37 %  Ti    8.96 % TiO2
   Manganese  21.57 %  Mn   27.85 % MnO
   Niobium     3.47 %  Nb    4.97 % Nb2O5
   Iron        7.31 %  Fe    9.40 % FeO
   Silicon    16.80 %  Si   35.94 % SiO2
   Hydrogen    0.30 %  H     2.69 % H2O
   Oxygen     35.89 %  O
   Fluorine    1.42 %  F     1.42 % F
                -   %  F    -0.60 % -O=F2
             ______        ______ 
             100.00 %      100.30 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: K2.25Na0.75Mn2+5.25Fe2+1.75Ti1.5Nb0.5Si8O26(OH)4(F)
Help on Environment: Environment: The monoclinic version is kukpletskite-Ma2b2c and the triclinic version is kupletskite-1A
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1956
Help on Locality: Locality: Lovozero massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Boris Mikhailovich Kupletski (1984-1964) and Elsa Maximilianove Bohnshtedt Kupletskaya (1897-1974), Russian geologists.
Help on Synonym: Synonym: ICSD 86867
  PDF 26-6
 

Kupletskite Image

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Kupletskite

Comments: Bronze-colored stellate crystalline spray of kupletskite on white orthoclase.
Location: 3M quarry, Little Rock, Pulaski County, Arkansas, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals
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Kupletskite   Niobokupletskite

Comments: Back-scattered electron image of Niobokupletskite (Nkpt) rimming kupletskite (Kpt). The zoning in the kupletskite is from Nb-poor to Nb-rich in the direction of the arrow (dark to medium gray). (CanMin v 38, p 628).
Location: Mont Saint-Hilaire, Quebec, Canada. Scale: Scale bar 100 µ-m.
© Canadian Mineralogist

Kupletskite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.2325:1:0.9118
Help on Cell Dimensions: Cell Dimensions: a = 5.4022, b = 23.226, c = 21.1782, Z = 4; beta = 95.246° V = 2,646.13 Den(Calc)= 3.36
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.64(1), 3.51(1), 2.57(0.5),1.732(0.4), 2.1(0.4), 2.76(0.1), 3(0.1), 3.25(0.1),
Click Here for Large Kupletskite Structure Window Crystal Structure:

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Piilonen P C , McDonald A M , Lalonde A E , The Canadian Mineralogist , 41 (2003) p.27-54, Insights into astrophyllite-group minerals II: Crystal chemistry, Note: sample NOR17, alkali granite, Locality: Gjerdingen intrusion, Norway

View Additional jPOWD Structure files for Kupletskite
[1] [10] [11] [12] [13] [2] [3] [4] [5] [6] [7] [8] [9]
 

Physical Properties of Kupletskite

Help on Cleavage: Cleavage: [001] Perfect
Help on Color: Color: Yellow brown, Black, Black brown.
Help on Density: Density: 3.2 - 3.23, Average = 3.21
Help on Diaphaniety: Diaphaniety: Translucent to Opaque
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 4 - Fluorite
Help on Luster: Luster: Vitreous - Adamantine
Help on Streak: Streak: brown
 

Optical Properties of Kupletskite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.037 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.078 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2069,KPDmeas= 0.2163,KC= 0.2245
Help on Optical Data: Optical Data: Biaxial (-), a=1.656, b=1.699, g=1.731, bire=0.0750, 2V(Calc)=78, 2V(Meas)=79.
 

Calculated Properties of Kupletskite

Help on Electron Density: Electron Density:

relectron=3.11 gm/cc
note: rKupletskite =3.22 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.01651
Boson Index = 0.98349
Help on Photoelectric: Photoelectric:

PEKupletskite = 15.04 barns/electron
U=PEKupletskite x relectron= 46.72 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 91.72 (Gamma Ray American Petroleum Institute Units)

Estimated Radioactivity from Kupletskite - barely detectable

 

Kupletskite Classification
Help on Dana Class: Dana Class: 69.1.1.2 (69)Inosilicate Chains with Side Branches or Loops
  (69.1)with (P=2, and N=4, 2 branches)
  (69.1.1)Astrophyllite group
 
69.1.1.1 Astrophyllite K2Na(Fe,Mn)7Ti2Si8O26(OH)4 P1 1
 
69.1.1.2 Kupletskite K2Na(Mn,Fe)7(Ti,Nb)2Si8O26(OH)4F C 2/c 2/m
 
69.1.1.3 Kupletskite-(Cs) (Cs,K)2Na(Mn,Fe,Li)7(Ti,Nb)2Si8O26(OH)4F P1 1
 
69.1.1.4 Niobophyllite K2Na(Fe,Mn)7(Nb,Ti)2Si8O26(OH)4(F,O) P1,P 1 Tri
 
69.1.1.5 Zircophyllite K2(Na,Ca)(Mn,Fe)7(Zr,Nb)2Si8O26(OH)4F P1 1
 
69.1.1.6 Hydroastrophyllite (H3O,K)2Ca(Fe,Mn)5-6Ti2Si8O26(OH)4F P1 1
 
69.1.1.7 Magnesiumastrophyllite K2Na[Na(Fe,Fe,Mn)Mg2]Ti2Si8O26(OH)4F A2/m 2/m
 
69.1.1.8 Niobokupletskite! K2Na(Mn,Zn,Fe)7(Nb,Zr,Ti)2Si8O26(OH)4(O,F) P1 1
Help on Strunz Class: Strunz Class: VIII/G.12-50 VIII - Silicates
  VIII/G - Intermediate between chain- and layered silicates
  VIII/G.12 - Astrophyllite- Kupletskite group
 
VIII/G.12-20 Magnesiumastrophyllite K2Na[Na(Fe,Fe,Mn)Mg2]Ti2Si8O26(OH)4F A2/m 2/m
 
VIII/G.12-30 Hydroastrophyllite (H3O,K)2Ca(Fe,Mn)5-6Ti2Si8O26(OH)4F P1 1
 
VIII/G.12-40 Astrophyllite K2Na(Fe,Mn)7Ti2Si8O26(OH)4 P1 1
 
VIII/G.12-50 Kupletskite K2Na(Mn,Fe)7(Ti,Nb)2Si8O26(OH)4F C 2/c 2/m
 
VIII/G.12-60 Kupletskite-(Cs) (Cs,K)2Na(Mn,Fe,Li)7(Ti,Nb)2Si8O26(OH)4F P1 1
 
VIII/G.12-65 Niobokupletskite! K2Na(Mn,Zn,Fe)7(Nb,Zr,Ti)2Si8O26(OH)4(O,F) P1 1
 
VIII/G.12-70 Zircophyllite K2(Na,Ca)(Mn,Fe)7(Zr,Nb)2Si8O26(OH)4F P1 1
 
VIII/G.12-80 Niobophyllite K2Na(Fe,Mn)7(Nb,Ti)2Si8O26(OH)4(F,O) P1,P 1 Tri
 

Other Kupletskite Information
Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8, AmMin, Vol 87, p 768) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Kupletskite :
1 - Alkali-Nuts(English) 2 - Alkali-Nuts(Francais) 3 -Am. Min. Crystal Structure Database 4 - Amethyst Galleries' Mineral Gallery 5 -Athena 6 - EUROmin Project 7 -Google Images 8 -Google Scholar 9 -Handbook of Mineralogy (MinSocAm) 10 -Handbook of Mineralogy (UofA) 11 -MinDAT 12 -MinMax(Deutsch) 13 -MinMax(English) 14 -Mineralienatlas (Deutsch) 15 -QUT Mineral Atlas 16 -École des Mines de Paris

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Kupletskite

K2Na(Mn,Fe++)7(Ti,Nb)2Si8O26(OH)4F
Dana No: 69.1.1.2 Strunz No: VIII/G.12-50
Locality:

 

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