-
hardness 5.5-6
Luster Vitreous to
greasy Streak White Density 3.6 (measured)
Optical properties Uniaxal(+)
Refractive index nω=1.70, nε=1.71 References...
- two
optic axes. The two
classes of
minerals naturally become known as
uniaxal and biaxal—or, in
later literature,
uniaxial and biaxial. In 1813, Brewster...
-
descriptions of
opacity Or, in
older literature, biaxal. Or, in
older literature,
uniaxal.
Yariv & Yeh (1984, pp. 86–7) give an
example of the
contrary kind, in...
-
Enclosure Containing Matter in
Visible Motion," and "Internal
Radiation in
Uniaxal Crystals." In 1859 he was
appointed director of Kew Observatory, and there...
