Norsethite
BaMg(CO3)2 [CNMNC approved formula]
Named for Keith Norseth (1927-1991), American engineering geologist, Westvaco trona mine, Wyoming, USA,.
| IMA status : | Approved Species 1960 () |
| CLASSIFICATION | |
| Dana (8th edition) : |
14.02.02.01 |
| (14) Anhydrous Carbonates | |
| (14.02) with Compound Formula A+ B++ (CO3)2 | |
| (14.02.02) Norsethite Group | |
| Nickel-Strunz (10th edition) : |
05.AB.30 |
| (05) Carbonates and Nitrates | |
| (05.A) Carbonates without additional anions, without H2O | |
| (05.AB) Alkali-earth (and other M2+) carbonates | |
| Crystal system: | Trigonal System |
| Point group (H-M): | 32 — trapezoidal |