Chemistry:Zirkelite
From HandWiki
| Zirkelite | |
|---|---|
| General | |
| Category | Oxide mineral |
| Formula (repeating unit) | (Ti,Ca,Zr)O (2-x) |
| Strunz classification | 4.DL.05 |
| Crystal system | Isometric |
| Crystal class | Hexoctahedral (m3m) H-M symbol: (4/m 3 2/m) |
| Unit cell | a = 5.02 Å, Z = 4 |
| Identification | |
| Color | Black, reddish brown |
| Crystal habit | Crystalline, metamict, pseudocubic |
| Cleavage | None |
| Fracture | Brittle |
| |re|er}} | Resinous |
| Streak | Brownish grey |
| Diaphaneity | Subtranslucent to opaque[1] |
| Density | 4.7 |
| Other characteristics |  Radioactive |
Zirkelite is an oxide mineral with the chemical formula (Ca,Th,Ce)Zr(Ti,Nb)
2O
7. It occurs as well-formed fine sized isometric crystals. It is a black, brown or yellow mineral with a hardness of 5.5 and a specific gravity of 4.7.
Name and discovery
Zirkelite was first discovered in Brazil in 1895. It was named for Germany petrographer Ferdinand Zirkel (1838–1912).
Occurrence
Initial discovery was from the Jacupiranga carbonatite, Sao Paulo, Brazil. It is also found in Canada , Kazakhstan, Norway , Russia , South Africa , the United Kingdom , and the United States .
See also
References
- ↑ "Zirkelite Mineral Data". http://www.webmineral.com/data/Zirkelite.shtml#.VfLMJygViko.
- ↑ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine 85 (3): 291–320. doi:10.1180/mgm.2021.43. Bibcode: 2021MinM...85..291W.
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