VS
Name
—
(Y,Ln,Ca,Th)(Ti,Nb)₂(O,OH)₆
Formula
—
Mineral Species
Entry type
—
Oxides & Hydroxides
Chemical class
—
Orthorhombic
Crystal system
—
5–6
Mohs hardness
—
4.82–4.93
Specific gravity
—
White, pale yellow, reddish yellow
Streak
—
Submetallic to pearly on crystal faces, resinous to waxy on fracture surfaces
Luster
—
Perfect on {100}, {010}, and {001}
Cleavage
—
Pnma
Space group
—
Aeschynite
Structural group
—
Aes-Y · Approved
IMA
—
1906
Named in
—
Pale yellow, yellow-orange, pale greenish yellow
Typical colors
—
Y · Ln · Ca · Th · Ti · Nb · O · H
Elements
—