Allochalcoselite Mineral Data

General Allochalcoselite Information
Chemical Formula:	Cu+Cu++5PbO2(SeO3)2Cl5
Composition:	Molecular Weight = 1,060.48 gm
	Copper 35.47 % Cu 6.75 % Cu₂O / 36.90 % CuO
	Lead 20.91 % Pb 22.52 % PbO
	Selenium 14.82 % Se 20.82 % SeO₂
	Chlorine 16.75 % Cl 16.75 % Cl
	- % Cl -3.78 % -O=Cl₂
	Oxygen 12.05 % O
	______ ______
	100.00 % 99.96 % = TOTAL OXIDE
Empirical Formula:	CuCu_4.92Pb_1.07Se_1.99O_7.99Cl_5.01
Environment:	Found among lead and copper selenite-chloride exhalative products associated with the fumaroles.
IMA Status:	Approved IMA 2004 (Dana # Added)
Locality:	Second cinder cone of the northern breach of the Great Tolbachik Fissure Eruption, Kamchatka Region, Russia. Link to MinDat.org Location Data.
Name Origin:	The name is compositional and is derived from the Greek, a???? ("different") + ?a???? ("copper") + se??'??("selenium"), to reflect the different valences and crystallographic behavi or of copper in this selenite mineral.
Synonym:	IMA2004-025