Nikischerite
NaFe2+6Al3(SO4)2(OH)18(H2O)12 [CNMNC approved formula]
Named for Anthony (Tony) J. Nikischer (1949-), geologist (Excalibur Minerals) who discovered the mineral.
| IMA status : | Approved Species 2001 () |
| CLASSIFICATION | |
| Dana (8th edition) : |
31.01.02.02 (This Dana# Added) |
| (31) Hydrated Sulfates Containing Hydroxyl or Halogen | |
| (31.01) where (A+ B++)m (XO4)p Zq · x(H2O), where m:p>6:1 | |
| (31.01.02) | |
| Nickel-Strunz (10th edition) : |
07.DD.35 |
| (07) Sulfates (selenates, tellurates, chromates, molybdates, wolframates) | |
| (07.D) Sulfates (selenates, etc.) with additional anions, with H2O | |
| (07.DD) With only medium-sized cations; sheets of edge-sharing octahedra | |
| Crystal system: | Trigonal System |
| Point group (H-M): | 3 — rhombohedral |