Pararealgar
Jump to navigation
Jump to search
Description
An orange-yellow arsenic sulfide mineral that can occur as a light induced alteration product of realgar. Pararealgar has been found in association with realgar in occasional classical and European paintings.
Synonyms and Related Terms
arsenic sulfide
Other Properties
Monoclinic, yellow, prismatic crystals. Fracture=brittle and uneven Luster=vitreous to resinous. Pigment particles are irregular with high relief.
| Composition | AsS |
|---|---|
| Mohs Hardness | 1.0-1.5 |
| Density | 3.52 |
| Molecular Weight | 106.99 |
| Refractive Index | >2.02 |
Hazards and Safety
Highly toxic by ingestion and inhalation. Carcinogen and mutagen
Additional Information
° K. Trentelman, L. Stodulski, M. Pavlosky, 'Characterization of pararealgar and other light-induced transformation products from realgar by Raman microspectroscopy' Analytical Chemistry 68 (1996) 1755-1761.° Webmineral: Pararealgar
Sources Checked for Data in Record
- Nicholas Eastaugh, Valentine Walsh, Tracey Chaplin, Ruth Siddall, Pigment Compendium, Elsevier Butterworth-Heinemann, Oxford, 2004