lansfordite
noun
lans·ford·ite
ˈlan(t)sfə(r)ˌdīt,
-anzf-
plural -s
: a mineral MgCO3.5H2O composed of a hydrous basic carbonate of magnesium like paraffin when first taken out of the ground but altering to nesquehonite on exposure
Word History
Etymology
German lansfordit, from Lansford, Pennsylvania, its locality + German -it -ite