roeblingite
noun
roe·bling·ite
| \ ˈrōbliŋˌīt\
plural -s
Definition of roeblingite
: a mineral supposedly Ca7Pb2H10(SO4)2(SiO4)6 consisting of an acid lead calcium silicate and sulfate occurring in white crystalline masses (hardness 3, specific gravity 3.4)
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