Jan Kuyper, G.Bryan Street
JACS
Thermal analysis and X-ray powder diffraction data have been used to show that realgar synthesized directly from arsenic and sulfur exists in the high temperature β phase, which is metastable at room temperature. The X-ray powder data indicated that the metastable β phase is orthorhombic with lattice constants a = 9·95 A ̊, b = 13·49 A ̊ and c = 7·07 A ̊. The enthalpy of the α to β transition and the enthalpy of fusion were measured as 0·83 kcal/mole and 6·0 kcal/mole respectively. The observed stability of β realgar relative to decomposition to As2S3 was greater than that reported in the literature for α realgar. © 1970.
Jan Kuyper, G.Bryan Street
JACS
G.Bryan Street
Journal of Solid State Chemistry
Thomas C. Clarke, Roy H. Geiss, et al.
Journal of the Chemical Society, Chemical Communications
W.D. Gill, G.Bryan Street
Journal of Non-Crystalline Solids