Apuanite
Fe3+4Fe2+Sb3+4O12S [CNMNC approved formula]
Named for the locality: Buca della Vena mine, northeast of Stazzema, Apuan Alps, Tuscany, Italy.
| IMA status : | Approved Species 1978 (IMA1978-069) |
| CLASSIFICATION | |
| Dana (8th edition) : |
45.01.09.01 |
| (45) Acid and normal Antimonites, Arsenites and Phosphites | |
| (45.01) with miscellaneous formulae | |
| (45.01.09) | |
| Nickel-Strunz (10th edition) : |
04.JA.25 |
| (04) Oxides and Hydroxides | |
| (04.J) Arsenites, Antimonites, Bismuthites, Sulfites, | |
| (04.JA) Arsenites, antimonites, bismuthites; without additional anions, without H2O | |
| Crystal system: | Tetragonal System |
| Point group (H-M): | 4/mmm (or 4/m 2/m 2/m) — ditetragonal-dipyramidal |
| Unit cell: | a = 8.372 Å, c = 17.974 Å |
| Crystal Habit: | Crystals platy or tabular; commonly massive aggregates |
| Color: | Black |
| Diaphaneity: | Opaque |
| Luster: | Metallic |
| Hardness (Mohs): | 4 |
| Measured Density: | 5.33 g/cm3 |
| Cleavage: | 1; {110} perfect |
| Streak: | Black |
| Geologic Setting: | In an iron deposit in barite formed by low-grade metasomatic processes at the contact between phyllites and dolostones. |
| Mineral Association: | Versiliaite, barite, magnetite, hematite, pyrite |
Origin: Buca della Vena Mine, Stazzema (Ponte Stazzemese) , Versilia, Apuan Alps, Lucca Province, Tuscany, ItalyPicture size: 1.2 mm
Photo and Owner: Thomas Witzke