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Anorpiment

A valid IMA mineral species

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Photos of Anorpiment (20)

Anorpiment Gallery Search Photos of Anorpiment

Edit Add Synonym Edit CIF structures Clear Cache

Anorpiment

Palomo mines, Castrovirreyna Province, Huancavelica, Peru

Anorpiment, etc.

Palomo mines, Castrovirreyna Province, Huancavelica, Peru

Anorpiment, etc.

Palomo mines, Castrovirreyna Province, Huancavelica, Peru

Anorpiment

Palomo mines, Castrovirreyna Province, Huancavelica, Peru

Anorpiment, etc.

Palomo mines, Castrovirreyna Province, Huancavelica, Peru

Anorpiment, etc.

Palomo mines, Castrovirreyna Province, Huancavelica, Peru

Anorpiment

Palomo mines, Castrovirreyna Province, Huancavelica, Peru

Anorpiment, etc.

Palomo mines, Castrovirreyna Province, Huancavelica, Peru

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About AnorpimentHide

Formula:

As₂S₃

Colour:

Greenish yellow

Lustre:

Resinous, Pearly

Hardness:

1½

Specific Gravity:

3.33

Crystal System:

Triclinic

Name:

Named for its triclinic (anorthic) symmetry and its dimorphous relationship to orpiment.

Type Locality:

ⓘ Palomo mines, Castrovirreyna Province, Huancavelica, Peru

Dimorph of:

Orpiment

This page provides mineralogical data about Anorpiment.

Unique IdentifiersHide

Mindat ID:

42349

Long-form identifier:

mindat:1:1:42349:2

GUID
(UUID V4):

bd02c825-b23a-4b94-a07a-42b2f00a19ae

IMA Classification of AnorpimentHide

IMA status:

Approved

Approval year:

2011

Classification of AnorpimentHide

Strunz-mindat (2024):

2.FA.

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

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Symbol	Source	Reference
Apm	IMA–CNMNC	Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Pronunciation of AnorpimentHide

Pronunciation:

Play	Recorded by	Country
	Jolyon Ralph	United Kingdom

Physical Properties of AnorpimentHide

Lustre:

Resinous, Pearly

Transparency:

Transparent

Comment:

Resinous on crystal faces, pearly on cleavage surfaces

Colour:

Greenish yellow

Streak:

Yellow

Hardness:

1½ on Mohs scale

Tenacity:

Sectile

Cleavage:

Perfect
Perfect and easy on {001}

Fracture:

Irregular/Uneven

Density:

3.33 g/cm³ (Measured) 3.321 g/cm³ (Calculated)

Optical Data of AnorpimentHide

Type:

Biaxial (-)

Comments:

All indices of refraction are greater than 2.

Chemistry of AnorpimentHide

Mindat Formula:

As₂S₃

Elements listed:

As, S - search for minerals with similar chemistry

Crystallography of AnorpimentHide

Crystal System:

Triclinic

Class (H-M):

1 - Pinacoidal

Space Group:

Setting:

Cell Parameters:

a = 5.7577(2) Å, b = 8.7169(3) Å, c = 10.2682(7) Å
α = 78.152(7)°, β = 75.817(7)°, γ = 89.861(6)°

Ratio:

a:b:c = 0.661 : 1 : 1.178

Unit Cell V:

488.38 Å³

Morphology:

The crystal forms include {010}, {110}, {110}, {001}, {021} and {021}. The faces of the {110} and {110} forms are typically incompletely formed and cavernous.

Crystal StructureHide

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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure

ID	Species	Reference	Link	Year	Locality	Pressure (GPa)	Temp (K)
0018526	Anorpiment	Kampf A R, Downs R T, Housley R M, Jenkins R A, Hyrsl J (2011) Anorpiment, As2S3, the triclinic dimorph of orpiment Mineralogical Magazine 75 2857-2867		2011	Palomo mine, Castrovirreyna Province, Huancavelica Department, Peru	0	293

CIF Raw Data - click here to close

data_global
_chemical_name_mineral 'Anorpiment'
loop_
_publ_author_name
'Kampf A R'
'Downs R T'
'Housley R M'
'Jenkins R A'
'Hyrsl J'
_journal_name_full 'Mineralogical Magazine'
_journal_volume 75 
_journal_year 2011
_journal_page_first 2857
_journal_page_last 2867
_publ_section_title
;
 Anorpiment, As2S3, the triclinic dimorph of orpiment
;
_database_code_amcsd 0018526
_chemical_compound_source 'Palomo mine, Castrovirreyna Province, Huancavelica Department, Peru'
_chemical_formula_sum 'As2 S3'
_cell_length_a 5.7577
_cell_length_b 8.7169
_cell_length_c 10.2682
_cell_angle_alpha 78.152
_cell_angle_beta 75.817
_cell_angle_gamma 89.861
_cell_volume 488.377
_exptl_crystal_density_diffrn      3.346
_symmetry_space_group_name_H-M 'P -1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
As1   0.39108   0.36238   0.67225   0.02442
As2   0.81064   0.17527   0.83715   0.02433
As3   0.37392   0.67873   0.83354   0.02455
As4   0.93519   0.86377   0.66860   0.02401
S1   0.90075   0.92003   0.87870   0.02840
S2   0.49936   0.11754   0.75544   0.03040
S3   0.75475   0.61916   0.74806   0.03000
S4   0.05571   0.27458   0.62594   0.02710
S5   0.31075   0.77483   0.62295   0.02750
S6   0.24319   0.42417   0.88062   0.02900
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
As1 0.02430 0.02060 0.02770 -0.00155 -0.00473 -0.00577
As2 0.02650 0.02120 0.02830 0.00289 -0.00749 -0.01095
As3 0.02680 0.02100 0.02860 0.00398 -0.00738 -0.01117
As4 0.02670 0.02010 0.02710 0.00446 -0.00934 -0.00593
S1 0.03820 0.02200 0.02680 0.00640 -0.01070 -0.00600
S2 0.02450 0.02190 0.04920 0.00350 -0.01310 -0.01240
S3 0.02390 0.02110 0.04840 0.00320 -0.01050 -0.01330
S4 0.02840 0.02790 0.02730 0.00030 -0.01020 -0.00700
S5 0.02450 0.02900 0.02830 0.00370 -0.00470 -0.00650
S6 0.03580 0.02320 0.02640 -0.00360 -0.00440 -0.00580

X-Ray Powder DiffractionHide

Powder Diffraction Data:

d-spacing	Intensity
4.867 Å	(97)
4.519 Å	(77)
3.609 Å	(82)
2.880 Å	(75)
2.552 Å	(100)
2.469 Å	(96)

Geological EnvironmentHide

Paragenetic Mode(s):

Paragenetic Mode	Earliest Age (Ga)
High-𝑇 alteration and/or metamorphism
33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12])

Type Occurrence of AnorpimentHide

Type Locality:

ⓘ Palomo mines, Castrovirreyna Province, Huancavelica, Peru

General Appearance of Type Material:

Drusy coatings of wedge shaped crystals up to 0.2 mm.

Place of Conservation of Type Material:

Two cotype specimens are deposited in the Natural History Museum of Los Angeles County, catalogue numbers 63514 and 63544. One cotype is deposited in the collections of the Mineral Museum of the University of Arizona, catalogue number 19326.

Synonyms of AnorpimentHide

IMA2011-014

Other Language Names for AnorpimentHide

German:Anauripigment

Common AssociatesHide

Associated Minerals Based on Photo Data:

23 photos of Anorpiment associated with Orpiment	As₂S₃
15 photos of Anorpiment associated with Galena	PbS
10 photos of Anorpiment associated with Quartz	SiO₂
9 photos of Anorpiment associated with Realgar	As₄S₄
8 photos of Anorpiment associated with Baryte	BaSO₄
8 photos of Anorpiment associated with Sphalerite	ZnS
4 photos of Anorpiment associated with Chalcopyrite	CuFeS₂
2 photos of Anorpiment associated with Pyrite	FeS₂
2 photos of Anorpiment associated with Seligmannite	PbCuAsS₃
1 photo of Anorpiment associated with Stibnite	Sb₂S₃

Related Minerals - Strunz-mindat Grouping Hide

2.FA.	Bonazziite	As₄S₄	Mon. 2/m : B2/b
2.FA.	Paradimorphite	As₄S₃	Orth. mmm (2/m 2/m 2/m) : Pnma
2.FA.05	Duranusite	As₄S	Orth. mmm (2/m 2/m 2/m) : Pmna
2.FA.10	Dimorphite	As₄S₃	Orth. mmm (2/m 2/m 2/m) : Pnma
2.FA.15b	Pararealgar	As₄S₄	Mon. 2/m : P2₁/b
2.FA.15a	Realgar	As₄S₄	Mon. 2/m
2.FA.15d	UM1970-18-S:As	As₄S₄	Mon. 2/m : B2/b
2.FA.20	Alacránite	As₈S₉	Mon. 2/m : P2/b
2.FA.25	Uzonite	As₄S₅	Mon. 2/m : P2₁/m
2.FA.30	Laphamite	As₂Se₃	Mon. 2/m
2.FA.30	Orpiment	As₂S₃	Mon. 2/m
2.FA.35	Getchellite	AsSbS₃	Mon. 2/m : P2₁/b
2.FA.40	Wakabayashilite	[(As,Sb)₆S₉][As₄S₅]	Orth. mm2 : Pna2₁
2.FA.40	Kalgoorlieite	As₂Te₃	Mon. 2/m : B2/m

Other InformationHide

Notes:

Insoluble in concentrated HCl.

Health Risks:

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

Internet Links for AnorpimentHide

mindat.org URL:

https://www.mindat.org/min-42349.html
Please feel free to link to this page.

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External Links:

Look for Anorpiment on Webmineral

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Raman and XRD data at RRUFF project

References and PDF downloads at RRUFF project

American Mineralogist Crystal Structure Database

Handbook of Mineralogy page PDF

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References for AnorpimentHide

Reference List:

Kampf, A. R., Downs, R. T., Housley, R. M., Jenkins, R. A., Hyršl, J. (2011) Anorpiment, As₂S₃, the triclinic dimorph of orpiment. Mineralogical Magazine, 75 (6) 2857-2867 doi:10.1180/minmag.2011.075.6.2857

Williams, P. A., Hatert, F., Pasero, M., Mills, S. J. (2011) New minerals and nomenclature modifications approved in 2011, CNMNC Newsletter No. 10. Mineralogical Magazine, 75 (5) 2549-2561 doi:10.1180/minmag.2011.075.5.2549

Banaru, D. A., Aksenov, S. M., Yamnova, N. A., Banaru, A. M. (2023) Structural Complexity of Molecular, Chain, and Layered Crystal Structures of Natural and Synthetic Arsenic Sulfides. Crystallography Reports, 68 (2) Pleiades Publishing Ltd. 223-236 doi:10.1134/s1063774523020037

(2023) Anorpiment. Handbook of Mineralogy. Mineralogical Society of America

Localities for AnorpimentHide

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.


Peru (TL)
Huancavelica Castrovirreyna Province ⓘ Palomo mines (TL)	Kampf et al. (2011) +1 other reference

Romania
Maramureș County Băiuț ⓘ Breiner Mine (Brainer Mine; Breiner deposit)	Łukasz Kruszewski PXRD & pXRF analysis ...

Anorpiment

About AnorpimentHide

Unique IdentifiersHide

IMA Classification of AnorpimentHide

Classification of AnorpimentHide

Mineral SymbolsHide

Pronunciation of AnorpimentHide

Physical Properties of AnorpimentHide

Optical Data of AnorpimentHide

Chemistry of AnorpimentHide

Crystallography of AnorpimentHide

Crystal StructureHide

X-Ray Powder DiffractionHide

Geological EnvironmentHide

Type Occurrence of AnorpimentHide

Synonyms of AnorpimentHide

Other Language Names for AnorpimentHide

Common AssociatesHide

Related Minerals - Strunz-mindat GroupingHide

Other InformationHide

Internet Links for AnorpimentHide

References for AnorpimentHide

Localities for AnorpimentHide

Locality ListHide

Related Minerals - Strunz-mindat Grouping Hide