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UM1970-19-S:As

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Big Photo

Crassier Saint-Pierre, La Ricamarie, Saint-Etienne, Loire, Rhône-Alpes, France
© JF Carpentier




Formula:
As
 
4
S
 
4
System:MonoclinicColour:yellow, yellow-orange


Beta-As4S4.

Classification of UM1970-19-S:As

IMA status:Unnamed - valid
Nickel-Strunz 10th (pending) edition ID:2.FA.15c

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
Dana 8th edition ID:2.8.21.4

2 : SULFIDES
8 : AmXp, with m:p = 1:1
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Type Occurrence of UM1970-19-S:As

Type Locality:Alacrán Mine, Alacrán, Pampa Larga district, Tierra Amarilla, Copiapó Province, Atacama Region, Chile

Physical Properties of UM1970-19-S:As

Lustre:Resinous
Colour:yellow, yellow-orange

Crystallography of UM1970-19-S:As

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:B2/b {B1 1 2/b} {C2/c} {C1 2/c 1}
Cell Parameters:a = 9.82Å, b = 9.29Å, c = 8.86Å
β = 102.03°
Ratio:a:b:c = 1.057 : 1 : 0.954
Unit Cell Volume:V 793 ų

Chemical Properties of UM1970-19-S:As

Formula:
As
 
4
S
 
4
Essential elements:As, S
All elements listed in formula:As, S

Relationship of UM1970-19-S:As to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
2.FA.05Duranusite
As
 
4
S
2.FA.10Dimorphite
As
 
4
S
 
3
2.FA.15bPararealgar
As
 
4
S
 
4
2.FA.15aRealgar
As
 
4
S
 
4
2.FA.15dUM1970-18-S:As
As
 
4
S
 
4
2.FA.20Alacránite
As
 
8
S
 
9
2.FA.25Uzonite
As
 
4
S
 
5
2.FA.30Laphamite
As
 
2
(Se,S)
 
3
2.FA.30Orpiment
As
 
2
S
 
3
2.FA.35Getchellite
AsSbS
 
3
2.FA.40Wakabayashilite
[(As,Sb)
 
6
S
 
9
][As
 
4
S
 
5
]

Other Names for UM1970-19-S:As

Synonyms:
Low RealgarUM1970-19Unnamed beta-As4S4
Other Languages:

Other Information

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

References for UM1970-19-S:As

Reference List:

- +
Clark, A.H., Alpha-Arsenic Sulfide from Mina Alacran, Pampa Larga, Chile, American Mineralogist 55, 1338(1970)

BURNS P.C. and PERCIVAL J.B. (2001). Alacranite, As4S4: a new occurrence, new formula, and determination of the crystal structure, Canadian Mineralogist, 39, 809-818.

BONAZZI P., BINDI L., POPOVA V., PRATESI G. and MENCHETTI S. (2003). Alacranite, As8S9: structural study of the holotype and re-assignment of the original chemical formula, American Mineralogist, 88, 1796-1800

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    • Localities for UM1970-19-S:As

    The 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.
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    (TL) indicates type locality. ? 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
     
    • Atacama Region
      • Copiapó Province
        • Tierra Amarilla
          • Pampa Larga district
            • Alacrán
    		American Mineralogist 55,1338(1970)
    France
     
    • Rhône-Alpes
      • Loire
        • Saint-Etienne
          • La Ricamarie
    		http://www.mindat.org/mesg-6-119758.html
    Papua New Guinea
     
    • New Ireland Province
      • Lihir Island area
    		Can Min 39 (3), 2001, 809-818
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    Copyright © Jolyon Ralph and Ida Chau 1993-2011. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 21st Jun 2011 01:58:00
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