Pyrrhotite-4C
A structural variant of Pyrrhotite
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Formula:
Fe7S8
Crystal System:
Monoclinic
A polytype of Pyrrhotite
The most common polytype of pyrrhotite.
Formed usually at low temperatures and stable at low temperature.
The most common polytype of pyrrhotite.
Formed usually at low temperatures and stable at low temperature.
Unique Identifiers
Mindat ID:
40439
Long-form identifier:
mindat:1:1:40439:0
Chemistry of Pyrrhotite-4C
Mindat Formula:
Fe7S8
Elements listed:
Crystallography of Pyrrhotite-4C
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/b
Setting:
C2/c
Cell Parameters:
a = 11.88 Å, b = 6.87 Å, c = 22.79 Å
β = 90.47°
β = 90.47°
Ratio:
a:b:c = 1.729 : 1 : 3.317
Unit Cell V:
1,859.96 ų (Calculated from Unit Cell)
Comment:
Originally described in non-standard setting F2/d, with a = 11.902(8), b = 6.859(5), c = 22.787(10) Å, and β = 90°26' ± 3' (Tokonami et al., 1971)..
Synonyms of Pyrrhotite-4C
Common Associates
Associated Minerals Based on Photo Data:
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.
Internet Links for Pyrrhotite-4C
mindat.org URL:
https://www.mindat.org/min-40439.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for Pyrrhotite-4C
Reference List:
Tokonami, Masayasu, Nishiguchi, Katsuhisa, Morimoto, and Nobuo (1972) Crystal structure of a monoclinic pyrrhotite (Fe7S8) American Mineralogist, 57 (7-8) 1066-1080
Powell, Anthony V., Vaqueiro, Paz, Knight, Kevin S., Chapon, Laurent C., Sánchez, Rodolfo D. (2004) Structure and magnetism in synthetic pyrrhotite Fe7S8: A powder neutron-diffraction study. Physical Review B, 70 (1). 014415-1-014415-12 doi:10.1103/physrevb.70.014415
Harries, D., Pollok, K., Langenhorst, F. (2011) Translation interface modulation in NC-pyrrhotites: Direct imaging by TEM and a model toward understanding partially disordered structural states. American Mineralogist, 96 (5) 716-731 doi:10.2138/am.2011.3644
Jin, Lei, Koulialias, Dimitrios, Schnedler, Michael, Gehring, Andreas U., Pósfai, Mihály, Ebert, Philipp, Charilaou, Michalis, Schäublin, Robin E., Jia, Chun-Lin, Löffler, Jörg F., Dunin-Borkowski, Rafal E. (2021) Atomic-Scale Characterization of Commensurate and Incommensurate Vacancy Superstructures in Natural Pyrrhotites. American Mineralogist, 106 (1). 82-96 doi:10.2138/am-2020-7479ccby
Localities for Pyrrhotite-4C
symbol to view information about a locality.
The Locality List
- 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).
All localities listed without proper references should be considered as questionable.
Austria | |
| Kolitsch (2016) |
Poland | |
| Dulski et al. (2025) |
Russia | |
| Ivanyuk et al. (2018) |