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Brookita
 Brookita | |
|---|---|
 | |
| Ezaugarri orokorrak | |
| Kategoria | oxido |
| Formula | |
| Dana sailkapena | 4.4.5.1 |
| Nickel-Strunz sailkapena | 4.DD.10 |
| Sistema kristalino | ortoerronbikoa |
| Talde espazial | mmm (2/m 2/m 2/m) - dipiramidala |
| Zelda unitatea | a = 5,4558 Å; b = 9,1819 Å; c = 5,1429 Å; |
| Eponimoa | Henry-James Brooke (en)  |
| Identifikazioa | |
| Kolorea | marroia, yellowish brown*, reddish brown; dar brown to iron-black; yellowish brown to dark brown in transmitted light* |
| Esfoliazioa | poor/indistinct - on {120}, in traces on {001}* |
| Distira | adamantino, subadamantino, beira, sub-vitreous*, sub-metallic* |
| Errefrakzio indizea | nα = 2,583 nβ = 2,584 nγ = 2,700 |
| Ezaugarri optikoak | biaxial (+)* |
| Pleokroismoa | ahul |
| 2V angelua | kalkulu: 12° to 20° |
| Erreferentziaka | [1] |
Brookita oxido motako minerala da.[1]
- ↑ a b (Ingelesez) «Brookite: Mineral information, data and localities.» www.mindat.org (Noiz kontsultatua: 12-05-2019).
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