Senekevichite Mineral Data

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General Senekevichite Information

Chemical Formula:

CsKNaCa2TiO[Si7O18(OH)]

Composition:

Molecular Weight = 817.63 gm

Cesium 16.25 % Cs 17.23 % Cs₂O

Potassium 4.78 % K 5.76 % K₂O

Calcium 9.80 % Ca 13.72 % CaO

Titanium 5.86 % Ti 9.77 % TiO₂

Silicon 24.04 % Si 51.44 % SiO₂

Hydrogen 0.12 % H 1.10 % H₂O

Oxygen 39.14 % O

______ ______

100.00 % 99.02 % = TOTAL OXIDE

Empirical Formula:

CsKCa₂TiOSi₇O₁₈(OH)

Environment:

Cs-dominant analogue of tinaksite

IMA Status:

Proposed IMA 2004 (Dana # Added)

Locality:

Dara-i-Pioz glacier, Tajikistan Link to MinDat.org Location Data.

Name Origin:

Commission on New Minerals, Nomenclature and Classification (CNMNC)

Synonym:

IMA2004-017

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Senekevichite Crystallography

Axial Ratios:

a:b:c =0.8511:1:0.5765

Cell Dimensions:

a = 10.4191, b = 12.2408, c = 7.0569, Z = 2; alpha = 90.857°, beta = 99.193°, gamma = 91.895° V = 887.88 Den(Calc)= 3.06

Crystal System:

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

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.06(1), 3.14(0.21), 2.959(0.2),2.038(0.17), 3.25(0.16), 4.08(0.13), 3.33(0.11),

Optical Properties of Senekevichite

Optical Data:

NCalc= 1.64 - from Gladstone-Dale relationship (KC = 0.2097) where Ncalc=Dcalc*KC+1

Calculated Properties of Senekevichite

Electron Density:

Bulk Density (Electron Density)=2.96 gm/cc
note: Specific Gravity of Senekevichite =3.06 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_{Senekevichite}= 67.78 barns/electron
U=PE_{Senekevichite} x r_electron= 200.41 barns/cc.

Radioactivity:

GRapi = 66.67 (Gamma Ray American Petroleum Institute Units)
Concentration of Senekevichite per GRapi unit = 1.50 (%)

Estimated Radioactivity from Senekevichite - barely detectable

Senekevichite Classification

Dana Class:

67.02.01.03 (67)Inosilicate Unbranched Chains with W>2

(67.02)with W=5

(67.02.01)Tinaksite group

67.02.01.01 Tinaksite K2Na(Ca,Mn)2(Ti,Fe)O[Si7O18(OH)] P1,P 1 Tri

67.02.01.02 Tokkoite K2Ca4[Si7O18(OH)](F,OH) P1 1

67.02.01.03 Senekevichite! CsKNaCa2TiO[Si7O18(OH)] P1 1

Strunz Class:

09.DG.07.5 09 - SILICATES (Germanates)

09.D - Inosilicates* Structural terminology according to Liebau (1985)

09.DG -Inosilicates with 3-periodic single and multiple chains

09.DG.07.5 Senekevichite! CsKNaCa2TiO[Si7O18(OH)] P1 1

Other Senekevichite Information

See Also:

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

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Senekevichite

CsKNaCa2TiO[Si7O18(OH)]
Dana No: 67.02.01.03 Strunz No: 09.DG.07.5
Locality:

Notes: