Pronunciation Guide 
General Information |
|
 Chemical Formula: |
(K,Na)1-x(Ta,Nb,Al)4(O,OH)11 |
| Environment: |
Granite pegmatites. |
| IMA Status: |
Approved IMA 1982 |
| Locality: |
Kola Peninsula, Russia. |
| Name Origin: |
Named for A. F. Sosedko (1901-1957), Russian mineralogist. |
Classification |
|
| Dana Class: |
8.7.6.2 (8)Multiple Oxides with Nb, Ta, and Ti |
| (8.7)Dana Type | |
| (8.7.6)Dana Group | |
| Strunz Class: |
IV/D.27-50 IV - Oxides |
| IV/D - Oxides with metal : oxygen = 1:2 (MO2 and related compounds) | |
| IV/D.27 - Bahianite - Sosedkoite series | |
Crystallography |
|
| Axial Ratios: |
a:b:c =0.9729:1:0.2227 |
| Cell Dimensions: |
a = 17.25, b = 17.73, c = 3.95, Z = 1; V = 1,208.08 |
| Crystal System: |
Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pban |
| X Ray Diffraction: |
By Intensity(I/Io): 3.95(1) 3.03(0.9) 1.974(0.6) |
Physical Properties |
|
| Cleavage: |
None |
| Color: |
colorless. |
| Density: |
6.9 |
| Diaphaniety: |
Transparent |
| Hardness: |
6 - Orthoclase |
| Luminescence: |
Non-fluorescent. |
| Luster: |
Adamantine |
| Streak: |
white |
Other Information |
|
| References: |
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) |
| See Also: |
Links to other databases for Sosedkoite : 1 -Athena Mineralogy 2 - EUROmin Project 3 -MinDat.org Location Data 4 -MinMax 5 -École des Mines de Paris Search for Sosedkoite using: Visit our Advertisers for Sosedkoite : Ask about Sosedkoite here : |
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