phil·ip·stad·ite
| \ ˈfilə̇pˌstäˌdīt \
plural -s
Definition of philipstadite
: a mineral approximately Ca2(Fe, Mg)5(Si, Al)8O22(OH)2 consisting of silicate of calcium, iron, magnesium, and aluminum and belonging to the amphibole group
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Merriam-Webster unabridged
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