slavikite
noun
slav·ik·ite
ˈslavə̇ˌkīt
plural -s
: a mineral (Na, K)2Fe10(OH)6(SO4)13.63H2O(?) consisting of a hydrous basic sodium ferric sulfate and occurring as small greenish yellow rhombohedral crystals on weathered shales from Bohemia
Word History
Etymology
Czech slavíkite, from František Slavik †1957 Czech mineralogist + Czech -ite