Guettardite
Pb(Sb,As)2S4 [CNMNC approved formula]
Named for Jean Etienne Guettard (17-15-1786), French geologist.
| IMA status : | Approved Species 1967 () |
| CLASSIFICATION | |
| Dana (8th edition) : |
03.07.08.02 |
| (03) Sulfides - Sulfosalts | |
| (03.07) where z/y = 2 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals | |
| (03.07.08) Sartorite Group | |
| Nickel-Strunz (10th edition) : |
02.HC.05a |
| (02) Sulfides | |
| (02.H) Sulfosalts of SnS Archetype | |
| (02.HC) With only Pb | |
| Crystal system: | Monoclinic System |
| Point group (H-M): | 2/m — prismatic |