Manganiandrosite-(Ce) Mineral Data

General Manganiandrosite-(Ce) Information
Chemical Formula:	(Mn++,Ca)(Ce,REE)AlMn+++Mn++(Si2O7)(SiO4)O(OH)
Composition:	Molecular Weight = 599.53 gm
	Strontium 1.02 % Sr 1.21 % SrO
	Calcium 2.81 % Ca 3.93 % CaO
	Lanthanum 5.33 % La 6.25 % La₂O₃
	Cerium 10.75 % Ce 12.59 % Ce₂O₃
	Samarium 0.25 % Sm 0.29 % Sm₂O₃
	Magnesium 0.16 % Mg 0.27 % MgO
	Titanium 0.80 % Ti 1.33 % TiO₂
	Manganese 20.43 % Mn 18.46 % MnO / 8.82 % Mn₂O₃
	Aluminum 4.50 % Al 8.50 % Al₂O₃
	Iron 2.14 % Fe 3.06 % Fe₂O₃
	Silicon 14.05 % Si 30.07 % SiO₂
	Hydrogen 0.17 % H 1.50 % H₂O
	Neodymium 2.89 % Nd 3.37 % Nd₂O₃
	Oxygen 34.69 % O
	______ ______
	100.00 % 99.65 % = TOTAL OXIDE
Empirical Formula:	Mn²⁺_0.6Ca_0.4Ce_0.46La_0.23Nd_0.12Sm_0.01Sr_0.07Ca_0.02Mn³⁺_0.63Fe³⁺_0.23Ti_0.1Mg_0.04Al Mn²⁺_0.96Mn³⁺_0.04(Si₂O₇)(SiO₄)(OH)
Environment:	Found in a Mesozoic eclogite-facies ophiolitic unit of the western Alps. Manganiandrosite-(Ce) has dominant Mn+++ in the M1 site. Epidote group; structure determined
IMA Status:	Approved IMA 2002 (Dana # Added)
Locality:	Praborna manganese mine, Saint-Marcel, Aosta valley, Italy. Link to MinDat.org Location Data.
Name Origin:	Commission on New Minerals, Nomenclature and Classification (CNMNC)
Synonym:	IMA2002-049