Vastmanlandite-(Ce) Mineral Data

General Vastmanlandite-(Ce) Information
Chemical Formula:	(Ce,La)3CaAl2Mg2[Si2O7][SiO4]3F(OH)2
Composition:	Molecular Weight = 1,094.51 gm
	Calcium 3.37 % Ca 4.71 % CaO
	Lanthanum 11.80 % La 13.84 % La₂O₃
	Cerium 20.74 % Ce 24.29 % Ce₂O₃
	Praeseodymium 1.80 % Pr 2.11 % Pr₂O₃
	Samarium 0.41 % Sm 0.48 % Sm₂O₃
	Gadolinium 0.14 % Gd 0.17 % Gd₂O₃
	Yttrium 0.16 % Y 0.21 % Y₂O₃
	Magnesium 3.38 % Mg 5.60 % MgO
	Aluminum 4.63 % Al 8.76 % Al₂O₃
	Iron 2.81 % Fe 1.18 % FeO / 2.70 % Fe₂O₃
	Silicon 12.68 % Si 27.12 % SiO₂
	Phosphorus 0.03 % P 0.06 % P₂O₅
	Hydrogen 0.18 % H 1.65 % H₂O
	Neodymium 5.53 % Nd 6.46 % Nd₂O₃
	Oxygen 31.25 % O
	Fluorine 1.08 % F 1.08 % F
	- % F -0.45 % -O=F₂
	______ ______
	100.00 % 99.95 % = TOTAL OXIDE
Empirical Formula:	Ce_1.62La_0.93Nd_0.42Pr_0.14Sm_0.03Y_0.02Gd_0.01Ca_0.92Mg_1.52Fe²⁺_0.18Fe³⁺_0.37Al_1.88Si_4.94 P_0.01O₁₉(OH)₂F_0.62O_0.38
Environment:	Material is from a now abandoned Fe mine, the Malmk�rra deposit, which consists of disseminated magnetite-amphibole skarn replacements in marble. Related to epidote group; structure determined.
IMA Status:	Approved IMA 2002 (Dana # Added)
Locality:	Lanthanide mineral deposits in V�stmanland county, Bergslagen mining region, south-central Sweden. Link to MinDat.org Location Data.
Name Origin:	The name is for V�stmanland, the county where the majority of the lanthanide deposits are found.
Synonym:	IMA2002-025