Montgomeryite

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]

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]

References

1. "Montgomeryite". mindat.org. Retrieved 10 August 2019.
2. Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85: 291–320.
3. Larsen, Esper S. (1940-05-01). "Overite and montgomeryite: two new minerals from Fairfield, Utah". American Mineralogist. 25 (5): 315–326. ISSN 0003-004X.
4. "Fairfield Utah Varisite nodules". www.minsocam.org. Retrieved 2019-08-11.
5. 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.