thortveitite
noun
thort·veit·ite
| \ (ˈ)tȯ(r)t¦vīˌtīt, (ˈ)thȯ-\
plural -s
Definition of thortveitite
: a mineral (Sc,Y)2Si2O7 consisting of scandium yttrium silicate and occurring in slender grayish-green orthorhombic crystals (hardness 6–7, specific gravity 3.6)
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