sheridanite

noun

sher·​i·​dan·​ite

ˈsherədᵊnˌīt

plural -s

: a mineral (Mg₉Al₃)(Al₃Si₅)O₂₀(OH)₁₆ of the chlorite group consisting of pale greenish colorless basic silicate of magnesium and aluminum

Word History

Etymology

Sheridan county, Wyoming, its locality + English -ite

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