- Aeschynite-(Y)
Aeschynite-(Y) (or Aeschinite-(Y), Aeschynite-(Yt), Blomstrandine, Priorite) (Y,Ca,Fe,Th)(Ti,Nb)2(O,OH)6 is a
mineral ofyttrium ,calcium ,iron ,thorium ,titanium ,niobium ,oxygen , andhydrogen . Its name comes from the Greek word for "shame". Its Mohs scale rating is 5 to 6.External links
* [http://www.mindat.org/min-39.html Mindat.org]
* [http://www.webmineral.com/data/Aeschynite-%28Y%29.shtml Webmineral.org]General Aeschynite-(Y) Information Chemical Formula: (Y,Ca,Fe)(Ti,Nb)2(O,OH)6 Composition: Molecular Weight = 274.97 gm Calcium 4.37 % Ca 6.12 % CaO Yttrium 19.40 % Y 24.64 % Y2O3 Titanium 30.47 % Ti 50.84 % TiO2 Niobium 8.45 % Nb 12.08 % Nb2O5 Iron 2.03 % Fe 2.61 % FeO Hydrogen 0.37 % H 3.28 % H2O Oxygen 34.91 % O ______ ______ 100.00 % 99.56 % = TOTAL OXIDE Empirical Formula: Y0.6Ca0.3Fe2+0.1Ti1.75Nb0.25O5(OH) IMA Status: Approved IMA 1966 Locality: Norway, Urstad, Hittero 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. Synonym: Eschynite Physical Properties of Aeschynite-(Y) Cleavage: None Color: Black, Brownish black, Brown, Brownish yellow, Yellowish. Density: 4.85 - 5.13, Average = 4.99 Diaphaniety: Transparent to subtranslucent Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments. Habit: Massive - Uniformly indistinguishable crystals forming large masses. Hardness: 5-6 - Between Apatite and Orthoclase Luster: Adamantine - Resinous Streak: reddish yellow
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