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Geography Categories
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| Definition Of: |
Irtyshite
 General Information: Chemical Formula:Na2(Ta,Nb)4O11 Composition:(Molecular Weight = 901.74 gm)Sodium 5.10 % NaTantalum 70.23 % TaNiobium 5.15 % NbOxygen 19.52 % O Empirical Formula: Na2Ta3.5Nb0.5O11 Environment:Granitic pegmatites. IMA Status:Approved IMA Locality:Irtysh River area, eastern Kazakhstan. Name Origin:Named for the locality. Physical Properties: Cleavage:None Color:colorless. Density:7.03 Diaphaniety:Transparent Habits:Microscopic Crystals - Crystals visible only with microscopes., , Hardness:7 - Quartz Luster:Adamantine Streak:white More details...
Na2(Ta,Nb)4O11
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Mineralogy INDEX:
List of Terms: Terms beginning with "A", Page 1 |
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Page Number:
1 2 3 A: Page 1 of 3.
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