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UM1970-18-S:As

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Formula:
As4S4
System:
Monoclinic
Colour:
yellow
Lustre:
Resinous
alpha-As4S4. Stable above 250°C.


Classification of UM1970-18-S:As

Notes:
Unnamed (probably invalid)
Approval History:
Unnamed, and probably invalid.
2.FA.15d

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
F : Sulfides of arsenic, alkalies; sulfides with halide, oxide, hydroxide, H2O
A : With As, (Sb), S
2.8.21.3

2 : SULFIDES
8 : AmXp, with m:p = 1:1

Physical Properties of UM1970-18-S:As

Resinous
Colour:
yellow
Density:
3.46 g/cm3 (Measured)    3.46 g/cm3 (Calculated)

Chemical Properties of UM1970-18-S:As

Formula:
As4S4
Elements listed in formula:

Crystallography of UM1970-18-S:As

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/b
Cell Parameters:
a = 9.957 Å, b = 9.335 Å, c = 8.889 Å
β = 102.48°
Ratio:
a:b:c = 1.067 : 1 : 0.952
Unit Cell Volume:
V 806.698 ų
Z:
16
X-Ray Powder Diffraction Data:
d-spacingIntensity
5.75 (80)
5.01 (40)
3.93 (70)
3.20 (80)
3.08 (70)
3.01 (100)
2.89 (100)
2.82 (60)
(

First Recorded Occurrence of UM1970-18-S:As

Relationship of UM1970-18-S:As to other Species

2.FA.AnorpimentAs2S3
2.FA.BonazziiteAs4S4
2.FA.05DuranusiteAs4S
2.FA.10DimorphiteAs4S3
2.FA.15bPararealgarAs4S4
2.FA.15aRealgarAs4S4
2.FA.20AlacrániteAs8S9
2.FA.25UzoniteAs4S5
2.FA.30LaphamiteAs2(Se,S)3
2.FA.30OrpimentAs2S3
2.FA.35GetchelliteAsSbS3
2.FA.40Wakabayashilite[(As,Sb)6S9][As4S5]

Other Names for UM1970-18-S:As

Name in Other Languages:

Other Information

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for UM1970-18-S:As

Reference List:
American Mineralogist 55,1338(1970).

Canadian Mineralogist 11,520(1972)

Journal of the Chemical Society, Dalton Transactions (1972), 1347.

Internet Links for UM1970-18-S:As

mindat.org URL:
https://www.mindat.org/min-39034.html
Please feel free to link to this page.

Localities for UM1970-18-S:As

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Chile (FRL)
 
  • Atacama Region
    • Copiapó Province
      • Tierra Amarilla
        • Pampa Larga district
          • Alacrán
Amer. Min. 55,1338(1970)
Mineral and/or Locality  
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