Werdingite Mineral Data

General Werdingite Information
Chemical Formula:	(Mg,Fe)2Al14B4Si4O37
Composition:	Molecular Weight = 1,209.06 gm
	Magnesium 2.81 % Mg 4.67 % MgO
	Aluminum 31.69 % Al 59.87 % Al₂O₃
	Iron 4.16 % Fe 5.35 % FeO
	Silicon 9.29 % Si 19.88 % SiO₂
	Boron 3.22 % B 10.36 % B₂O₃
	Oxygen 48.83 % O
	______ ______
	100.00 % 100.13 % = TOTAL OXIDE
Empirical Formula:	Mg_1.4Fe²⁺_0.9Al_14.2B_3.6Si₄O_36.9
Environment:	Granitic pegmatites cutting granulite-facies metapelitic rocks
IMA Status:	Approved IMA 1990
Locality:	Cap Andrahomana, near Fort Dauphin, southeastern Madagascar (type locality of grandidierite), and at Almgjotheii, in the aureole of the Rogaland anorthosite complex, southwestern Norwa Link to MinDat.org Location Data.
Name Origin:	Named for Gunter Werding, of the Mineralogical Institute, Ruhr University, Bochum, Germany.
Name Pronunciation:	Werdingite + Pronunciation
Synonym:	ICSD 69604
	IMA1988-023
	PDF 46-1359