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UM1970-18-S:As

Invalid as an unnamed mineral
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Formula:
As4S4
Colour:
yellow
Lustre:
Resinous
Specific Gravity:
3.46
Crystal System:
Monoclinic
alpha-As4S4. Stable above 250°C.


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Unique IdentifiersHide

Mindat ID:
39034
Long-form identifier:
mindat:1:1:39034:3
GUID
(UUID V4):
5ff09df1-4072-4d89-99d7-a65cf16006fb

Classification of UM1970-18-S:AsHide

IMA status 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:AsHide

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

Chemical Properties of UM1970-18-S:AsHide

Formula:
As4S4

Crystallography of UM1970-18-S:AsHide

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 V:
806.698 ų
Z:
16

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
5.75 Å(80)
5.01 Å(40)
3.93 Å(70)
3.20 Å(80)
3.08 Å(70)
3.01 Å(100)
2.89 Å(100)
2.82 Å(60)

First Recorded Occurrence of UM1970-18-S:AsHide

Synonyms of UM1970-18-S:AsHide

Related Minerals - Strunz-mindat GroupingHide

2.FA.AnorpimentAs2S3Tric. 1 : P1
2.FA.BonazziiteAs4S4Mon. 2/m : B2/b
2.FA.ParadimorphiteAs4S3Orth. mmm (2/m 2/m 2/m) : Pnma
2.FA.05DuranusiteAs4SOrth. mmm (2/m 2/m 2/m) : Pmna
2.FA.10DimorphiteAs4S3Orth. mmm (2/m 2/m 2/m) : Pnma
2.FA.15bPararealgarAs4S4Mon. 2/m : P21/b
2.FA.15aRealgarAs4S4Mon. 2/m
2.FA.20AlacrániteAs8S9Mon. 2/m : P2/b
2.FA.25UzoniteAs4S5Mon. 2/m : P21/m
2.FA.30LaphamiteAs2Se3Mon. 2/m
2.FA.30OrpimentAs2S3Mon. 2/m
2.FA.35GetchelliteAsSbS3Mon. 2/m : P21/b
2.FA.40Wakabayashilite[(As,Sb)6S9][As4S5]Orth. mm2 : Pna21
2.FA.40KalgoorlieiteAs2Te3Mon. 2/m : B2/m

Other InformationHide

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:AsHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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:AsHide

Localities for UM1970-18-S:AsHide

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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Chile (FRL)
 
  • Atacama
    • Copiapó Province
      • Tierra Amarilla
        • Pampa Larga mining district
          • Alacrán
Clark, A.H. (1970) Alpha-arsenic sulfide, from Mina Alacrán, Pampa Larga, Chile. American Mineralogist, 55, 1338-1344.
 
Mineral and/or Locality  
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