Arsenopyrite : CSIRO Spectroscopy Database

Arsenopyrite [ FeAsS ]

Image of Arsenopyrite

Image of Arsenopyrite in specimen 'M 25917' (Museums Victoria) from Redruth, Cornwall, England

Photograph by Frank Coffa, Museums Victoria, CC-BY-4.0

Material properties

Formula	FeAsS
Abbreviation	Apy
Classification	Arsenopyrite (group)
IMA Status	Approved (IMA 1962 s.p.)
Search other databases	webmineral.com, mindat.org, rruf.info, mineralienatlas.de, Handbook of Mineralogy, American Mineralogist Crystal Structure Database
Crystal symmetry	Monoclinic, Point group 2/m, Space group P2₁/c (#14)
Tags	Mineral, Sulphide

Composition

Element	Atoms
S	1
As	1
Fe	1
Total:	3

Specimens of Arsenopyrite

Name	Owner	Materials	Phase purity	Image
M2296 Arsenopyrite	CSIRO	Arsenopyrite (100.0%)	100.0	M2296 Arsenopyrite Photograph of Arsenopyrite [ FeAsS ] in specimen 'M2296 Arsenopyrite' (CSIRO) (C) 2025 CSIRO Mineral Resources. All rights reserved.
M1821 Arsenopyrite	CSIRO	Arsenopyrite (91.3%), Quartz	91.3	M1821 Arsenopyrite Image of Arsenopyrite and Quartz in specimen 'M1821 Arsenopyrite' [CSIRO]. (C) 2025 CSIRO Mineral Resources. All rights reserved.
M2452 Arsenopyrite	CSIRO	Arsenopyrite (88.0%), Pyrite, Quartz	88.0	M2452 Arsenopyrite Image of Arsenopyrite, Pyrite and Quartz in specimen 'M2452 Arsenopyrite' [CSIRO]. (C) 2025 CSIRO Mineral Resources. All rights reserved.
M0414 Arsenopyrite / Glaucodot	CSIRO	Arsenopyrite (72.8%), Calcite, Dolomite, Glaucodot	72.8	M0414 Arsenopyrite / Glaucodot Image of Arsenopyrite, Calcite, Dolomite and Glaucodot in specimen 'M0414 Arsenopyrite / Glaucodot' [CSIRO]. (C) 2026 CSIRO Mineral Resources. All rights reserved.
M2581 Arsenopyrite / Dolomite / Quartz	CSIRO	Arsenopyrite (51.0%), Dolomite, Muscovite-1M, Pyrite, Quartz, Siderite	51.0	M2581 Arsenopyrite / Dolomite / Quartz Image of Arsenopyrite, Dolomite, Muscovite-1M, Pyrite, Quartz and Siderite in specimen 'M2581 Arsenopyrite / Dolomite / Quartz' [CSIRO]. (C) 2026 CSIRO Mineral Resources. All rights reserved.
M0204 Quartz / Arsenopyrite	CSIRO	Arsenopyrite (42.4%), Galena, Löllingite, Quartz, Sphalerite	42.4	M0204 Quartz / Arsenopyrite Image of Quartz, Arsenopyrite, Galena, Löllingite and Sphalerite in specimen 'M0204 Quartz / Arsenopyrite' [CSIRO]. (C) 2025 CSIRO Mineral Resources. All rights reserved.
M0401 Arsenopyrite / Siderite / Calcite	CSIRO	Anglesite, Arsenopyrite (39.3%), Bournonite, Calcite, Mg, Siderite	39.3	M0401 Arsenopyrite / Siderite / Calcite Image of Arsenopyrite, Anglesite, Bournonite, Calcite (var. Mg) and Siderite in specimen 'M0401 Arsenopyrite / Siderite / Calcite' [CSIRO]. (C) 2026 CSIRO Mineral Resources. All rights reserved.
M2780 Chalcopyrite / Arsenopyrite / Siderite	CSIRO	Arsenopyrite (26.0%), Chalcopyrite, Jarosite, Pyrite, Siderite	26.0	M2780 Chalcopyrite / Arsenopyrite / Siderite Image of Chalcopyrite, Arsenopyrite, Jarosite, Pyrite and Siderite in specimen 'M2780 Chalcopyrite / Arsenopyrite / Siderite' [CSIRO]. (C) 2026 CSIRO Mineral Resources. All rights reserved.
M0279 Siderite / Arsenopyrite	CSIRO	Arsenopyrite (13.4%), Quartz, Siderite	13.4	M0279 Siderite / Arsenopyrite Image of Siderite, Arsenopyrite and Quartz in specimen 'M0279 Siderite / Arsenopyrite' [CSIRO]. (C) 2025 CSIRO Mineral Resources. All rights reserved.
M2096 Quartz / Ankerite	CSIRO	Ankerite, Arsenopyrite (7.0%), Fluorapatite, Muscovite-2M1, Pyrite, Quartz, Scheelite	7.0	M2096 Quartz / Ankerite Image of Quartz, Ankerite, Arsenopyrite, Fluorapatite, Muscovite-2M1, Pyrite and Scheelite in specimen 'M2096 Quartz / Ankerite' [CSIRO]. (C) 2026 CSIRO Mineral Resources. All rights reserved.
M2687 Pyrrhotite	CSIRO	Arsenopyrite (6.1%), Calcite, Mg, Magnetite, Pyrrhotite-4M, Pyrrhotite-5C, Sulfur, Szomolnokite	6.1	M2687 Pyrrhotite Image of Pyrrhotite-4M, Arsenopyrite, Calcite (var. Mg), Magnetite, Pyrrhotite-5C, Sulfur and Szomolnokite in specimen 'M2687 Pyrrhotite' [CSIRO]. (C) 2026 CSIRO Mineral Resources. All rights reserved.
M0367 Quartz	CSIRO	Arsenopyrite (4.1%), Quartz	4.1	M0367 Quartz Image of Quartz and Arsenopyrite in specimen 'M0367 Quartz' [CSIRO]. (C) 2026 CSIRO Mineral Resources. All rights reserved.