Langisite
A valid IMA mineral species
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About Langisite
Formula:
CoAs
May contain minor Ni replacing Co.
Colour:
Pink
Lustre:
Metallic
Hardness:
6 - 6½
Specific Gravity:
8.17 (Calculated)
Crystal System:
Hexagonal
Member of:
Name:
Named by W. Petruk, D.C. Harris, and J.M. Stewart in 1969 after the type locality of Langis mine, Cobalt-Gowganda area, Canada.
Unique Identifiers
Mindat ID:
2321
Long-form identifier:
mindat:1:1:2321:0
GUID
(UUID V4):
(UUID V4):
a5361620-579f-49ac-8521-357b8901de0a
IMA Classification of Langisite
Approved
First published:
1969
Classification of Langisite
2.CC.05
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
C : Metal Sulfides, M: S = 1: 1 (and similar)
C : With Ni, Fe, Co, PGE, etc.
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
C : Metal Sulfides, M: S = 1: 1 (and similar)
C : With Ni, Fe, Co, PGE, etc.
2.8.11.9
2 : SULFIDES
8 : AmXp, with m:p = 1:1
2 : SULFIDES
8 : AmXp, with m:p = 1:1
3.11.33
3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
11 : Sulphides etc. of Ni
3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
11 : Sulphides etc. of Ni
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Lgi | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Langisite
Optical Data of Langisite
Anisotropism:
Medium, bluish-grey to light brown
Bireflectance:
Very weak
Reflectivity:
Wavelength | R1 | R2 |
---|---|---|
470nm | 45.4% | 46.4% |
546nm | 46.4% | 47.1% |
589nm | 47.5% | 48.2% |
650nm | 49.9% | 51.0% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 51.0%.
R1 shown in black, R2 shown in red
Colour in reflected light:
pinkish-tan
Pleochroism:
Weak
Chemistry of Langisite
Mindat Formula:
CoAs
May contain minor Ni replacing Co.
May contain minor Ni replacing Co.
Elements listed:
Crystallography of Langisite
Crystal System:
Hexagonal
Class (H-M):
6 - Pyramidal
Space Group:
P63
Cell Parameters:
a = 3.538 Å, c = 5.127 Å
Ratio:
a:c = 1 : 1.449
Unit Cell V:
55.58 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Minute irregular grains and lamellae.
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
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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) |
---|---|---|---|---|---|---|---|
0011969 | Langisite | Fjellvag H, Selte K, Stave F E (1984) On the structural and magnetic properties of Co1-tNitAs and CoAs1-xSbx Acta Chemica Scandinavica A38 687-691 | 1984 | 0 | 293 | ||
0011970 | Langisite | Fjellvag H, Selte K, Stave F E (1984) On the structural and magnetic properties of Co1-tNitAs and CoAs1-xSbx Acta Chemica Scandinavica A38 687-691 | 1984 | synthetic | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
2.631 Å | (100) |
1.966 Å | (90) |
1.770 Å | (80) |
1.493 Å | (40) |
1.470 Å | (30) |
1.315 Å | (30) |
1.141 Å | (30) |
1.022 Å | (30) |
Comments:
Langis mine, Canada. The data are from the type description.
Geological Environment
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 Langisite
General Appearance of Type Material:
As irregular grains and lamellae in safflorite.
Place of Conservation of Type Material:
Canadian Geological Survey, Ottawa, Ontario, Canada, number 12140.
Royal Ontario Museum, Toronto, Ontario, Canada.
Royal Ontario Museum, Toronto, Ontario, Canada.
Geological Setting of Type Material:
In an arsenide-sulphide assemblage in a fault vein rich in silver.
Associated Minerals at Type Locality:
Synonyms of Langisite
Other Language Names for Langisite
Relationship of Langisite to other Species
Member of:
Other Members of this group:
Achávalite | FeSe | Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc |
Breithauptite | NiSb | Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc |
Freboldite | CoSe | Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc |
Kotulskite | Pd(Te,Bi)2-x (x ≈ 0.4) | Hex. |
Nickeline | NiAs | Hex. 6/mmm (6/m 2/m 2/m) : P63/mcm |
Sederholmite | beta-NiSe | Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc |
Sobolevskite | PdBi | Hex. |
Stumpflite | PtSb | Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc |
Sudburyite | PdSb | Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc |
Vavřínite | Ni2SbTe2 | Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc |
Zlatogorite | NiCuSb2 | Trig. 3m (3 2/m) : P3 1m |
Common Associates
Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
2.CC. | Tilkerodeite | Pd2HgSe3 |
2.CC. | UM2007-26-S:CuFeIrNiPtRh | (Ir,Cu,Ni,Pt,Rh,Fe)9S11 |
2.CC. | Crowningshieldite | (Ni0.9Fe0.10)S |
2.CC. | Eliopoulosite | V7S8 |
2.CC. | Kuvaevite | Ir5Ni10S16 |
2.CC. | Torryweiserite | Rh5Ni10S16 |
2.CC. | Tamuraite | Ir5Fe10S16 |
2.CC. | Ferrotorryweiserite | Rh5Fe10S16 |
2.CC.05 | Achávalite | FeSe |
2.CC.05 | Breithauptite | NiSb |
2.CC.05 | Freboldite | CoSe |
2.CC.05 | Kotulskite | Pd(Te,Bi)2-x (x ≈ 0.4) |
2.CC.05 | Nickeline | NiAs |
2.CC.05 | Sederholmite | beta-NiSe |
2.CC.05 | Sobolevskite | PdBi |
2.CC.05 | Stumpflite | PtSb |
2.CC.05 | Sudburyite | PdSb |
2.CC.05 | Jaipurite | CoS |
2.CC.05 | Zlatogorite | NiCuSb2 |
2.CC.10 | Pyrrhotite | Fe1-xS |
2.CC.10 | Smythite | (Fe,Ni)3+xS4 (x=0-0.3) |
2.CC.10 | Troilite | FeS |
2.CC.15 | Cherepanovite | RhAs |
2.CC.15 | Modderite | (Co,Fe)As |
2.CC.15 | Ruthenarsenite | (Ru,Ni)As |
2.CC.15 | Westerveldite | (Fe,Ni,Co)As |
2.CC.15 | Minakawaite | RhSb |
2.CC.20 | Millerite | NiS |
2.CC.20 | Mäkinenite | γ-NiSe |
2.CC.20 | UM1990-38-S:CuFeIrNiPtRh | (Ni,Fe,Rh,Cu,Ir,Pt)S |
2.CC.25 | Mackinawite | FeS |
2.CC.30 | Hexatestibiopanickelite | (Pd,Ni)(Sb,Te) ? |
2.CC.30 | Vavřínite | Ni2SbTe2 |
2.CC.35a | Braggite | PdPt3S4 |
2.CC.35b | Cooperite | PtS |
2.CC.35a | Vysotskite | PdS |
2.CC.45 | Jacutingaite | Pt2HgSe3 |
2.CC.50 | Imgreite | NiTe (?) |
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 Langisite
mindat.org URL:
https://www.mindat.org/min-2321.html
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Please feel free to link to this page.
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References for Langisite
Localities for Langisite
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).
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.
All localities listed without proper references should be considered as questionable.
Canada | |
| Bailey (2017) |
| 159-161. +1 other reference |
| Petruk et al. (1969) |
Czech Republic | |
| Scharm +7 other references |
Greece | |
| Tombros (2008) |
Tombros et al. (2019) | |
UK | |
| from XRD and EPMA results - B. Smith +1 other reference |
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Langis Mine, Casey Township, Cobalt Area, Cobalt-Gowganda region, Timiskaming District, Ontario, Canada