Dukeite Mineral Data

General Dukeite Information
Chemical Formula:	Bi+++24Cr++++++8O57(OH)6(H2O)3
Composition:	Molecular Weight = 6,499.55 gm
	Chromium 6.40 % Cr 12.31 % CrO₃
	Bismuth 77.17 % Bi 86.03 % Bi₂O₃
	Hydrogen 0.19 % H 1.66 % H₂O
	Oxygen 16.25 % O
	______ ______
	100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:	Bi₂₄Cr₈O₅₇(OH)₆(H₂O)₃
Environment:	Found on a specimen of pucherite.
IMA Status:	Approved IMA 1999 (Dana # Added)
Locality:	Found on a museum specimen labeled from the San Jose mine, Brejauba, Minas Gerais, Brazil. Corrected locality is Lavra da Posse, Sao Jose de Berjauba, Conceicao do Mato Dentro County, Link to MinDat.org Location Data.
Name Origin:	Named for Duke University, Duham, North Carolina, USA and for the Mary Duke Biddle Foundation.
Synonym:	ICSD 89799
	IMA1999-021