Chemical Formula: Al6.5-7(BO3)(SiO4)3(O,OH)3
Help on Composition: Composition: Molecular Weight = 571.93 g
 
Boron 1.89 % B 6.09 % B2O3 0.00 %
Oxygen 50.35 % O 0.00 % 0.00 %
Aluminum 33.02 % Al 62.40 % Al2O3 0.00 %
Silicon 14.73 % Si 31.52 % SiO2 0.00 %


99.99 % 100.01 %
 
Help on Empirical Formula: Empirical Formula: Al7O3(BO3)(SiO4)3
Help on Environment: Environment: Pegmatites, pneumatolytic, and metamorphic rocks
Help on Locality: Locality: San Diego Co., California.. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the French paleontologist, M. E. Dumortier (1803-1873)
Help on Synonym: Synonym: