Difference between revisions of "Pararealgar"
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== Description == | == 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. | + | 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 == | == Synonyms and Related Terms == | ||
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arsenic sulfide | arsenic sulfide | ||
| − | == | + | == Risks == |
| − | Monoclinic, yellow, prismatic crystals. Fracture=brittle and uneven Luster=vitreous to resinous. Pigment particles are irregular with high relief. | + | * Highly toxic by ingestion and inhalation. |
| + | * Carcinogen and mutagen | ||
| + | |||
| + | == Physical and Chemical Properties == | ||
| + | |||
| + | * Monoclinic, yellow, prismatic crystals. | ||
| + | * Fracture=brittle and uneven | ||
| + | * Luster=vitreous to resinous. | ||
| + | * Pigment particles are irregular with high relief. | ||
{| class="wikitable" | {| class="wikitable" | ||
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|- | |- | ||
! scope="row"| Density | ! scope="row"| Density | ||
| − | | 3.52 | + | | 3.52 g/ml |
|- | |- | ||
! scope="row"| Molecular Weight | ! scope="row"| Molecular Weight | ||
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|} | |} | ||
| − | == | + | ==Resources and Citations== |
| − | |||
| − | |||
| − | |||
| − | |||
| − | + | * 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: [http://webmineral.com/data/pararealgar.shtml Pararealgar] | |
* Nicholas Eastaugh, Valentine Walsh, Tracey Chaplin, Ruth Siddall, ''Pigment Compendium'', Elsevier Butterworth-Heinemann, Oxford, 2004 | * Nicholas Eastaugh, Valentine Walsh, Tracey Chaplin, Ruth Siddall, ''Pigment Compendium'', Elsevier Butterworth-Heinemann, Oxford, 2004 | ||
Revision as of 14:27, 17 October 2022
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
Risks
- Highly toxic by ingestion and inhalation.
- Carcinogen and mutagen
Physical and Chemical 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 g/ml |
| Molecular Weight | 106.99 |
| Refractive Index | >2.02 |
Resources and Citations
- 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
- Nicholas Eastaugh, Valentine Walsh, Tracey Chaplin, Ruth Siddall, Pigment Compendium, Elsevier Butterworth-Heinemann, Oxford, 2004