Chemical Properties
gemstone; green or blue; chief ore for beryllium; hexagonal, a=0.9188 nm, c=0.9189 nm [CIC73] [KIR78]
Chemical Properties
Beryl, Be3Al2Si6O18, is called aquamarine when pale green or blue from the presence of Fe, emerald when dark green from Cr or at times V, and morganite or red beryl when pink or red, respectively, from Mn. Only synthetic emerald is in commercial production.
Physical properties
(i) a low mass density;
(ii) low refractive indices;
(iii) dichroism;
(iv) a low birefringence.
Definition
A mineral, 3BeO.Al2O3.6SiO2,
used as a source of beryllium. There are
several varieties including the gemstones
emerald (colored green by traces of
chromium oxide) and aquamarine (a bluegreen
color).
Safety Profile
Confirmed carcinogen withexperimental carcinogenic, neoplastigenic, andtumorigenic data. When heated to decomposition it emitstoxic fumes of BeO.
