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Senekevichite Mineral Data
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General Senekevichite Information
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 Chemical Formula: |
CsKNaCa2TiO[Si7O18(OH)] |
| Composition: |
Molecular Weight = 817.63 gm |
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Cesium 16.25 % Cs 17.23 % Cs2O |
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Potassium 4.78 % K 5.76 % K2O |
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Calcium 9.80 % Ca 13.72 % CaO |
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Titanium 5.86 % Ti 9.77 % TiO2 |
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Silicon 24.04 % Si 51.44 % SiO2 |
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Hydrogen 0.12 % H 1.10 % H2O |
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Oxygen 39.14 % O |
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______ ______ |
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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
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| 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 - Pinacoidal H-M Symbol ( 1) Space Group: P1 |
| X Ray Diffraction: |
By Intensity(I/Io): 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), |
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Optical Properties of Senekevichite
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| Optical Data: |
NCalc= 1.64 - from Gladstone-Dale relationship (KC = 0.2097) where Ncalc=Dcalc*KC+1
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Calculated Properties of Senekevichite
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| Electron Density: |
Bulk Density (Electron Density)=2.96 gm/cc
note: Specific Gravity of Senekevichite =3.06 gm/cc.
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| Fermion Index: |
Fermion Index = 0.01
Boson Index = 0.99 |
| Photoelectric: |
PESenekevichite = 67.78 barns/electron
U=PESenekevichite x relectron= 200.41 barns/cc.
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| Radioactivity: |
GRapi = 66.67 (Gamma Ray American Petroleum Institute Units)
Concentration of Senekevichite per GRapi unit = 1.50 (%)
Estimated Radioactivity from Senekevichite  - barely detectable
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Senekevichite Classification
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| Dana Class: |
67.02.01.03 (67)Inosilicate Unbranched Chains with W>2 |
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(67.02)with W=5 |
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(67.02.01)Tinaksite group |
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67.02.01.01 Tinaksite K2Na(Ca,Mn)2(Ti,Fe)O[Si7O18(OH)] P1,P 1 Tri |
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67.02.01.02 Tokkoite K2Ca4[Si7O18(OH)](F,OH) P1 1 |
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67.02.01.03 Senekevichite! CsKNaCa2TiO[Si7O18(OH)] P1 1 |
| Strunz Class: |
09.DG.07.5 09 - SILICATES (Germanates) |
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09.D - Inosilicates* Structural terminology according to Liebau (1985) |
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09.DG -Inosilicates with 3-periodic single and multiple chains |
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09.DG.07.5 Senekevichite! CsKNaCa2TiO[Si7O18(OH)] P1 1 |
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Other Senekevichite Information
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| See Also: |
Links to other databases for Senekevichite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info
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Print or Cut-and-Paste your Senekevichite Specimen Label here :
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Senekevichite
CsKNaCa2TiO[Si7O18(OH)]
Dana No: 67.02.01.03 Strunz No: 09.DG.07.5
Locality:
Notes:
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