Ferro-ferri-hornblende
Ferro-ferri-hornblende is an amphibole-supergroup mineral with the formula ☐Ca2(Fe2+4Fe3+)(Si7Al)O22(OH)2. It contains essential vacancy (☐). It was discovered in the Traversella mine, Canavese, Torino, Piedmont, Italy.[1]
| Ferro-ferri-hornblende | |
|---|---|
| General | |
| Category | Inosilicate Amphibole supergroup |
| Formula (repeating unit) | ☐Ca2(Fe2+4Fe3+)(Si7Al)O22(OH)2 |
| Crystal system | Monoclinic |
| Crystal class | Prismatic (2/m) (same H-M symbol) |
| Space group | C2/m |
| Unit cell | a = 9.93, b = 18.22 c = 5.32 [Å], β = 104.86° (approximated) |
| Identification | |
| References | [1][2] |
References
- Oberti, R., Boiocchi, M., Hawthorne, F.C., Ball, N.A., Pagano, R., and Pagano, A., 2015. Ferro-ferri-hornblende, IMA 2015-054. CNMNC Newsletter No. 27, October 2015, 1227; Mineralogical Magazine 79, 1229–1236
- "Ferro-ferri-hornblende: Ferro-ferri-hornblende mineral information and data". Mindat.org. Retrieved 2016-03-13.
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