Vyalsovite
CaFeAlS(OH)5 [CNMNC approved formula]
Named for Leonid N. Vyalsov (1939-), Russian mineralogist.
| IMA status : | Approved Species 1990 () |
| CLASSIFICATION | |
| Dana (8th edition) : |
02.14.04.01 |
| (02) Sulfides - Including Selenides and Tellurides | |
| (02.14) (Hydroxyl or Hydrated) | |
| (02.14.04) | |
| Nickel-Strunz (10th edition) : |
02.FD.45 |
| (02) Sulfides | |
| (02.F) Sulfides of Arsenic, Alkalies; Sulfides with Halide, Oxide, Hydroxide, H2O | |
| (02.FD) With O, OH, H2O | |
| Crystal system: | Orthorhombic System |
| Point group (H-M): | mmm (or 2/m 2/m 2/m) — dipyramidal |