Chemical Formula: Ca2Fe++(Al,Fe+++)2(SiO4)(Si2O7)(OH)2·(H2O)
Help on Composition: Composition: Molecular Weight = 485.24 g
 
Hydrogen 0.62 % H 5.57 % H2O 0.00 %
Oxygen 42.86 % O 0.00 % 0.00 %
Aluminum 11.12 % Al 21.01 % Al2O3 0.00 %
Silicon 17.36 % Si 37.15 % SiO2 0.00 %
Calcium 16.52 % Ca 23.11 % CaO 0.00 %
Iron 11.51 % Fe 14.81 % FeO 0.00 %


99.99 % 101.65 %
 
Help on Empirical Formula: Empirical Formula: Ca2Fe2+Al2(SiO4)(Si2O7)(OH)·(H2O)
Help on Environment: Environment:
Help on Locality: Locality: Langban, near Filipstad, Varmland, Sweden (actually TL of julgoldite).. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the American geologist, R. Pumpelly (1837-1923)
Help on Synonym: Synonym: Ferropumpellyite