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ralstonite

noun ral·ston·ite \ ˈrȯlztəˌnīt , -lst- \
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Definition of ralstonite

plural -s
: a mineral NaMgAl5F12(OH)6.3H2O consisting of a hydrous basic fluoride of aluminum, sodium, and magnesium in octahedral crystals

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Origin and Etymology of ralstonite

J. Grier Ralston, 19th century American clergyman + English -ite

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