- Northupite
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Northupite
Northupite octahedraGeneral Category Carbonate minerals Chemical formula Na3Mg(CO3)2Cl Strunz classification 05.BF.05 Crystal symmetry m3 (2/m 3) - Diploidal Unit cell a = 13.98Å Identification Color Colourless, pale yellow, grey, brown; colourless in transmitted light Crystal system Isometric Fracture Conchoidal Tenacity Brittle Mohs scale hardness 3½ - 4 Luster Vitreous Diaphaneity Transparent Optical properties Isotropic Solubility Readily soluble in dilute acids with effervescence. Decomposed by hot water with the separation of magnesium carbonate. Northupite is an uncommon evaporite mineral, with the chemical formula Na3Mg(CO3)2Cl. It was discovered in 1895 at Searles Lake, San Bernardino County, California by C. H. Northup (b. 1861), a grocer from San Jose, California, for whom Northupite is named.
References
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