Haigerachite
KFe3+3(H2PO4)6(HPO4)2 • 4H2O [CNMNC approved formula]
Named for the village and valley near the locality: Silberbrunnle mine dump near Gengenbach in the central Black Forest, Aufschluss, Germany.
| IMA status : | Approved Species 1999 () |
| CLASSIFICATION | |
| Dana (8th edition) : |
39.03.10.01 (This Dana# Added) |
| (39) Hydrated Acid Phosphates | |
| (39.03) with miscellaneous formulae | |
| (39.03.10) | |
| Nickel-Strunz (10th edition) : |
08.CF.10 |
| (08) Phosphates, Arsenates, Vanadates | |
| (08.C) Phosphates without Additional Anions, with H2O | |
| (08.CF) With large and medium-sized cations, RO4:H2O > 1:1 | |
| Crystal system: | Monoclinic System |
| Point group (H-M): | 2/m — prismatic |