Pararealgar Mineral Data + 
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- 2.8.22.1 Realgar AsS P 21/n 2/m
- 2.8.22.2 Pararealgar AsS P 21/c 2/m
- 2.8.22.3 Uzonite As4S5 P 21/m 2/m
- 2.8.22.4 Alacranite As8S9 P 2/c 2/m
- II/F.02-10 Duranusite As4S Unk Ortho
- II/F.02-20 Dimorphite As4S3 P nma 2/m 2/m 2/m
- II/F.02-30 Realgar AsS P 21/n 2/m
- II/F.02-40 Pararealgar AsS P 21/c 2/m
- II/F.02-50 Alacranite As8S9 P 2/c 2/m
- II/F.02-60 Uzonite As4S5 P 21/m 2/m
- II/F.02-70 Orpiment As2S3 P 21/n 2/m
- II/F.02-80 Laphamite As2(Se,S)3 P 21/n 2/m
- II/F.02-90 Jeromite As(S,Se)2 None
General Pararealgar Information |
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 Chemical Formula: |
AsS | ||
| Composition: |
Molecular Weight = 106.99 gm | ||
| Arsenic 70.03 % As | |||
| Sulfur 29.97 % S | |||
| ______ | |||
| 100.00 % | |||
| Empirical Formula: |
AsS | ||
| Environment: |
As an alteration product of reagar in stibnite-bearing quartz veins. | ||
| IMA Status: |
Approved IMA 1980 | ||
| Locality: |
Mount Washington copper deposit, Vancouver Island, British Columbia, Canada. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named for its chemical identity with realgar. | ||
| Synonym: |
ICSD 80124 | ||
| IMA1980-034 | |||
| PDF 33-127 | |||
Pararealgar Image | |||
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Images:
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Pararealgar Crystallography |
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| Axial Ratios: |
a:b:c =1.0263:1:0.8805 | ||
| Cell Dimensions: |
a = 9.909, b = 9.655, c = 8.502, Z = 16; beta = 97.29° V = 806.82 Den(Calc)= 3.52 | ||
| Crystal System: |
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/c | ||
| X Ray Diffraction: |
By Intensity(I/Io): 5.14(1), 5.56(0.91), 3.75(0.78), | ||
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Crystal Structure:
Mouse |
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Physical Properties of Pararealgar |
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| Cleavage: |
None | ||
| Color: |
Light yellow, Orange brown, Orange. | ||
| Density: |
3.52 | ||
| Fracture: |
Brittle - Uneven - Very brittle fracture producing uneven fragments. | ||
| Habit: |
Powdery - Forms a loose, poorly-coherent pulverulent mass. | ||
| Hardness: |
1-1.5 - Talc or a little harder | ||
| Luster: |
Vitreous - Resinous | ||
| Streak: |
light yellow | ||
Optical Properties of Pararealgar |
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| Optical Data: |
Biaxial (?), b=2.02 | ||
| Pleochroism (x): |
orange yellow. | ||
| Pleochroism (y): |
bright yellow. | ||
| Pleochroism (z): |
orange red. | ||
Calculated Properties of Pararealgar |
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| Electron Density: |
relectron=3.22 gm/cc |
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| Fermion Index |
Fermion Index = 0.00224 Boson Index = 0.99776 |
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| Photoelectric: |
PEPararealgar = 51.07 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Pararealgar is Not Radioactive |
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Pararealgar Classification |
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| Dana Class: |
2.8.22.2 (2)Sulfides - Including Selenides and Tellurides | ||
| (2.8)where Am Bn Xp, with (m+n):p=1:1 | |||
| (2.8.22)Dana Group | |||
| Strunz Class: |
II/F.02-40 II - Sulfides and sulphosalts | ||
| II/F - Sulfides with nonmetallic properties, Arsenic-Sulfides | |||
| II/F.02 - Duranusite - Jeromite series | |||
Other Pararealgar Information |
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| References: |
NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1) | ||
| See Also: |
Links to other databases for Pararealgar : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris Search for Pararealgar using: Visit our Advertisers for Pararealgar : Translate Pararealgar Mineral Data : Ask about Pararealgar here : Print or Cut-and-Paste your Pararealgar Specimen Label here :
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