mineral From Wikipedia, the free encyclopedia
Ewaldita karbonato motako minerala da eta donnayite taldearen kidea da. [1]
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Ezaugarri orokorrak | |
Kategoria | karbonato |
Formula | |
Dana sailkapena | 14.2.4.1 |
Nickel-Strunz sailkapena | 5.CC.05 |
Sistema kristalino | hexagonala |
Talde espazial | 6mm - dihexagonal pyramidal* |
Zelda unitatea | a = 5,31 Å; c = 12,83 Å; |
Eponimoa | Paul Peter Ewald |
Aurkikuntza-lekua | Green River formation (Sweetwater Co.) (en) ![]() |
Identifikazioa | |
Kolorea | bluish green*, pale greenish gray* |
Errefrakzio indizea | nω = 1,646 nε = 1,572 |
Ezaugarri optikoak | uniaxial (-)* |
Pleokroismoa | visible |
Erreferentziaka | [1] |
Ewaldita karbonato mineralaren formula kimikoa hau da: . Sistema hexagonalaren arabera sortzen ditu kristalak.
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