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Lisiguangite

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Li Siguang
Formula:
PtCuBiS3
Hardness:
Specific Gravity:
7.42 (Calculated)
Crystal System:
Orthorhombic
Member of:
Name:
named for renowned Chinese geologist, Li Siguang (J.S. Lee) in honor of his birthday (26 October, 1889 Huanggang, Hubei, China - 29 April, 1971 Beijing). He was minister of geology of China (1952–1971), Vice President of the Chinese Academy of Sciences, and Chairman of the China National Association of the Sciences
This page provides mineralogical data about Lisiguangite.


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Classification of LisiguangiteHide

Approved
Approval Year:
2007
2.GA.25

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
G : Sulfarsenites, sulfantimonites, sulfbismuthites
A : Neso-sulfarsenites, etc. without additional S

Physical Properties of LisiguangiteHide

Hardness:
2½ on Mohs scale
Hardness:
VHN25=47 kg/mm2 - Vickers
Tenacity:
Brittle
Cleavage:
Perfect
perfect {010}, distinct {001}, and visible {100} cleavage
Fracture:
Step-Like
Density:
7.42 g/cm3 (Calculated)

Optical Data of LisiguangiteHide

Type:
Anisotropic
Anisotropism:
weak to moderate anisotropy with blue-green to brown colors, and parallel extinction
Bireflectance:
none
Colour in reflected light:
is bright white with a yellowish tin
Internal Reflections:
none
Pleochroism:
Non-pleochroic

Chemical Properties of LisiguangiteHide

Formula:
PtCuBiS3
IMA Formula:
CuPtBiS3

Crystallography of LisiguangiteHide

Crystal System:
Orthorhombic
Class (H-M):
2 2 2 - Disphenoidal
Space Group:
P21 21 21
Cell Parameters:
a = 7.7152(15) Å, b = 12.838(3) Å, c = 4.9248(10) Å
Ratio:
a:b:c = 0.601 : 1 : 0.384
Unit Cell V:
487.79 ų (Calculated from Unit Cell)
Z:
4

Type Occurrence of LisiguangiteHide

General Appearance of Type Material:
grains from heavy mineral concentrate. Idiomorphic, tabular or lamellar [on (010)] crystals elongated along [100] up to 2 mm long and 0.5 mm wide.
Place of Conservation of Type Material:
(polished thin sections) is deposited at the Geological Museum of China, Beijing (cat. no. M-11031)
Geological Setting of Type Material:
contact metamorphic in origin, with the PGM and sulfide minerals occurring in an exoskarn associated with mafic igneous rocks (garnet pyroxenite)
Associated Minerals at Type Locality:

Synonyms of LisiguangiteHide

Relationship of Lisiguangite to other SpeciesHide

Member of:
Other Members of this group:
LapieiteNiCuSbS3Orth.
MalyshevitePdCuBiS3Orth. mmm (2/m 2/m 2/m) : Pmmm
MückeiteNiCu(Bi,Sb)S3Orth. 2 2 2 : P21 21 21
Unnamed (Pd-Bi-Cu Selenide)PdBiCuSe3

Related Minerals - Nickel-Strunz GroupingHide

2.GA.05ProustiteAg3AsS3Trig. 3m (3 2/m) : R3c
2.GA.05PyrargyriteAg3SbS3Trig. 3m : R3c
2.GA.10PyrostilpniteAg3SbS3Mon. 2/m : P21/b
2.GA.10XanthoconiteAg3AsS3Mon. 2/m : B2/b
2.GA.15SamsoniteAg4MnSb2S6Mon. 2/m : P21/m
2.GA.20SkinneriteCu3SbS3Mon. 2/m : P21/b
2.GA.20WitticheniteCu3BiS3Orth. 2 2 2 : P21 21 21
2.GA.25LapieiteNiCuSbS3Orth.
2.GA.25MückeiteNiCu(Bi,Sb)S3Orth. 2 2 2 : P21 21 21
2.GA.25MalyshevitePdCuBiS3Orth. mmm (2/m 2/m 2/m) : Pmmm
2.GA.30AktashiteCu6Hg3As4S12Trig. 3 : R3
2.GA.30GruzdeviteCu6Hg3Sb4S12Trig.
2.GA.30NowackiiteCu6Zn3As4S12Trig. 3 : R3
2.GA.35LaffittiteAgHgAsS3Mon.
2.GA.40RouthieriteTl(Cu,Ag)(Hg,Zn)2(As,Sb)2S6Tet. 4 2m : I4 2m
2.GA.40StalderiteTl(Cu,Ag)(Zn,Fe,Hg)2(As,Sb)2S6Tet.
2.GA.45ErniggliiteTl2SnAs2S6Trig.
2.GA.50BournonitePbCuSbS3Orth. mm2 : Pmn21
2.GA.50SeligmannitePbCuAsS3Orth. mmm (2/m 2/m 2/m) : Pmmn
2.GA.50SoučekitePbCuBi(S,Se)3Orth.

Other InformationHide

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

References for LisiguangiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Yu, Z., Cheng, F., Ma, H. (2009): Lisiguangite, CuPtBiS3, a new platinum-group mineral from the Yanshan Mountains, Hebei, China. Acta Geologica Sinica, 83, 238-244.

Internet Links for LisiguangiteHide

Localities for LisiguangiteHide

ⓘ - Click for 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
China (TL)
 
  • Hebei Province
    • Chengde Prefecture
      • Yan Mts (Yanshan Mts)
Yu, Z., Cheng, F., Ma, H. (2009): Lisiguangite, CuPtBiS3, a new platinum-group mineral from the Yanshan Mountains, Hebei, China. Acta Geologica Sinica, 83, 238-244.
Mineral and/or Locality  
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