Kupletskite-(Cs) Mineral Data

Kupletskite-(Cs) Mineral Data +

General Kupletskite-(Cs) Information

Chemical Formula:

(Cs,K)2Na(Mn,Fe++,Li)7(Ti,Nb)2Si8O26(OH)4F

Composition:

Molecular Weight = 1,455.85 gm

Cesium 13.69 % Cs 14.52 % Cs₂O

Potassium 1.34 % K 1.62 % K₂O

Sodium 1.58 % Na 2.13 % Na₂O

Lithium 0.19 % Li 0.41 % Li₂O

Titanium 4.60 % Ti 7.68 % TiO₂

Manganese 17.36 % Mn 22.41 % MnO

Niobium 3.19 % Nb 4.56 % Nb₂O₅

Iron 8.06 % Fe 9.87 % FeO / 0.55 % Fe₂O₃

Silicon 15.43 % Si 33.02 % SiO₂

Hydrogen 0.28 % H 2.47 % H₂O

Oxygen 32.97 % O

Fluorine 1.30 % F 1.30 % F

- % F -0.55 % -O=F₂

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Cs_1.5K_0.5NaMn²⁺_4.6Fe²⁺₂Li_0.4Ti_1.4Nb_0.5Fe³⁺_0.1Si₈O₂₆(OH)₄F

Environment:

At the border of aegirine-microcline-quartz pegmatites.

IMA Status:

Approved IMA 1971

Locality:

In the [Dara-i-Pioz massif,] Alai Range, Tien Shan, Tadzhikistan. Link to MinDat.org Location Data.

Name Origin:

For the cesium in the composition and similarity to kupletskite. Renamed kupletskite-(Cs) from cesium kupletskite (IMA order 04-A).

Synonym:

Cesium-kupletskite

IMA2004-04a

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Kupletskite-(Cs) Crystallography

Axial Ratios:

a:b:c =0.4608:1:1.8023

Cell Dimensions:

a = 5.41, b = 11.74, c = 21.16, Z = 2; alpha = 89°, beta = 90°, gamma = 102.383° V = 1,312.48 Den(Calc)= 3.68

Crystal System:

Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1

Physical Properties of Kupletskite-(Cs)

Cleavage:

[001] Perfect

Color:

Brown, Black.

Density:

3.68

Diaphaniety:

Translucent to Opaque

Habit:

Platy - Sheet forms (e.g. micas).

Habit:

Rosette - Bundled tabular aggregates resembling rose flower petals.

Hardness:

4 - Fluorite

Luster:

Vitreous - Adamantine

Optical Properties of Kupletskite-(Cs)

Optical Data:

Biaxial (+), b=1.726, g=1.758, , 2V(Meas)=75.

Calculated Properties of Kupletskite-(Cs)

Electron Density:

r_electron=3.49 gm/cc
note: r_{Kupletskite-(Cs)}=3.68 gm/cc.

Fermion Index

Fermion Index = 0.01517
Boson Index = 0.98483

Photoelectric:

PE_{Kupletskite-(Cs)}= 68.38 barns/electron
U=PE_{Kupletskite-(Cs)} x r_electron= 238.55 barns/cc.

Radioactivity:

GRapi = 18.37 (Gamma Ray American Petroleum Institute Units)

Estimated Radioactivity from Kupletskite-(Cs) - barely detectable

Kupletskite-(Cs) Classification

Dana Class:

69.1.1.3 (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

Strunz Class:

VIII/G.12-60 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-(Cs) Information

References:

NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Kupletskite-(Cs) :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -Handbook of Mineralogy (MinSocAm) 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas

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Kupletskite-(Cs)

(Cs,K)2Na(Mn,Fe++,Li)7(Ti,Nb)2Si8O26(OH)4F
Dana No: 69.1.1.3 Strunz No: VIII/G.12-60
Locality:

Notes: