Montgomeryite is a phosphate mineral with the chemical formula Ca4MgAl4(PO4)6(OH)4·12H2O.[1] The mineral was discovered in Fairfield, Utah in a variscite nodule.[3][4] Montgomeryite is a very rare mineral and can only be found in a few places in the world.[5]
| Montgomeryite | |
|---|---|
 Montgomeryite found in South Australia | |
| General | |
| Category | Phosphate mineral |
| Formula (repeating unit) | Ca4MgAl4(PO4)6(OH)4·12H2O[1] |
| IMA symbol | Mgm[2] |
| Identification | |
| Color | Dark green to light green, colorless, red, yellow[1] |
| Mohs scale hardness | 4[1] |
References
edit- ^ a b c d "Montgomeryite". mindat.org. Retrieved 10 August 2019.
- ^ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85: 291–320.
- ^ Larsen, Esper S. (1940-05-01). "Overite and montgomeryite: two new minerals from Fairfield, Utah". American Mineralogist. 25 (5): 315–326. ISSN 0003-004X.
- ^ "Fairfield Utah Varisite nodules". www.minsocam.org. Retrieved 2019-08-11.
- ^ Marty, Joe; Howard, Donald G.; Barwood, Henry (1999-01-20). Minerals of the Utahlite Claim, Lucin, Box Elder County, Utah. Utah Geological Survey. ISBN 9781557916396.
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