Tantalaeschynite-(Y) Mineral Data

General Tantalaeschynite-(Y) Information
Chemical Formula:	(Y,Ce,Ca)(Ta,Ti,Nb)2O6
Composition:	Molecular Weight = 499.75 gm
	Calcium 0.80 % Ca 1.12 % CaO
	Cerium 8.41 % Ce 9.85 % Ce₂O₃
	Yttrium 10.67 % Y 13.56 % Y₂O₃
	Tantalum 54.31 % Ta 66.32 % Ta₂O₅
	Titanium 2.87 % Ti 4.80 % TiO₂
	Niobium 3.72 % Nb 5.32 % Nb₂O₅
	Oxygen 19.21 % O
	______ ______
	100.00 % 100.96 % = TOTAL OXIDE
Empirical Formula:	Y_0.6Ce_0.3Ca_0.1Ta_1.5Ti_0.3Nb_0.2O₆
Environment:	In a pegmatite.
IMA Status:	Approved IMA 1974
Locality:	S�o Jose do Sabug�, Para�ba, Brazil. Link to MinDat.org Location Data.
Name Origin:	Named for its composition and from the Greek for "shame," in allusion to the inability of chemists, at the time of its discovery, to separate some of its constituents.
Name Pronunciation:	Tantalaeschynite-(Y) + Pronunciation
Synonym:	Tantal-aeschynite-(Y) - Renamed Tantalaeschynite-(Y) by Mineralogical Record, v39 (2008), p131