pumpellyite
noun
pum·​pel·​ly·​ite
| \ ˌpəmˈpelēˌīt\
plural -s
Definition of pumpellyite
: a mineral Ca4(Al,Mg,Fe)6Si6O23(OH)3.2H2O(?) consisting of a hydrous calcium aluminosilicate probably related to clinozoisite
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