ATHENA MINERALOGY |
Mineral: | HOWIEITE |
---|---|
Formula: | Na(Fe2+,Mn)10(Fe3+,Al)2Si12O31(OH)13 |
Crystal System: | Anorthic (Triclinic) |
Group: | Howieite group |
IMA Number: | 1964-017 |
References: | CM 28 (1990), 855; HB2/1 (1995) |
Type Locality: | Laytonville quarry, Laytonville, Mendocino Co., California, USA |
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