General Information:
Chemical Formula:
(Y,Ca,Fe)(Ti,Nb)2(O,OH)6
Composition:
(Molecular Weight = 274.97 gm)
Calcium 4.37 % Ca
Yttrium 19.40 % Y
Titanium 30.47 % Ti
Niobium 8.45 % Nb
Iron 2.03 % Fe
Hydrogen 0.37 % H
Oxygen 34.91 % O
Empirical Formula:
Y0.6Ca0.3Fe2+0.1Ti1.75Nb0.25O5(OH)
IMA Status:
Accepted IMA 1966
Locality:
TL: Norway, Urstad, Hittero
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.
Physical Properties:
Cleavage:
None
Color:
black, brownish black, brown, brownish yellow, or yellowish.
Density:
4.85 - 5.13, Average = 4.99
Diaphaniety:
Transparent to subtranslucent
Habits:
Massive - Uniformly indistinguishable crystals forming large masses., ,
Hardness:
5-6 - Between Apatite and Orthoclase
Luster:
Adamantine - Resinous
Streak:
reddish yellow
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