Ag3AsS3, Proustite
Negative uniaxial crystal: no > ne
Molecular mass: 494.724
Specific gravity: 5.49 g/cm3 [1]; 5.629 g/cm3 [2]; 5.635 g/cm3 at T = 293K [3];
5.65 g/cm3 [4]
Point group: 3m
Lattice constants:
a = 10.74Å [5]; 10.756Å [6]; 10.82Å [4]
c = 8.64Å [5]; 8.652Å [6]; 8.69Å [4]
Mohs hardness: 2–2.5 [3]
Solubility in water: insoluble [3]
Melting point: 769K
About the crystal
Proustite was introduced in 1967 [5] and during the next decade was extensively
used for nonlinear frequency conversion to the IR range and for IR up-conversion.
However, this material is not free from drawbacks, such as lowvalue of surface damage
threshold and difficulty in obtaining large uniform monocrystals. In the 1980s, this
crystal was replaced by other materials (i.e., by AGS and GaSe).
详细参数下载：http://www.webcryst.com/zh/download/viewdownload/6-/193-ag3ass3-proustite.html
