<microscopy> A doubly refracting mineral used in the manufacture of polarizing prisms. It is uniaxial negative and in the trigonal diversion of the hexagonal system of crystals. Its indexes are epsilon =1.486, omega =1.658, its hardness is 3 on the Mohr scale and specific gravity 2.711.
See: balsam, Canada.
(05 Aug 1998)
|Bookmark with:||word visualiser||Go and visit our forums|