Ferro-ferri-hornblende
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| Ferro-ferri-hornblende | |
|---|---|
| General | |
| Category | Inosilicate Amphibole supergroup |
| Formula | ☐Ca2(Fe2+4Fe3+)(Si7Al)O22(OH)2 |
| IMA symbol | Ffhbl[1] |
| 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 | [2][3] |
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.[2]
