Changchengite (original) (raw)
A valid IMA mineral species
Specific Gravity:
11.96 (Calculated)
Name:
Named after Changcheng, the romanized name of the "Great Wall" of China.
This page provides mineralogical data about Changchengite.
Unique IdentifiersHide
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Long-form identifier:
mindat:1:1:6860:0
80450b7d-c42a-444f-b510-31d51f3e2636
IMA Classification of ChangchengiteHide
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Type description reference:
Classification of ChangchengiteHide
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2.EB.25
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
E : Metal Sulfides, M: S <= 1:2
B : M:S = 1:2, with Fe, Co, Ni, PGE, etc.
Mineral SymbolsHide
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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Ccg | 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 ChangchengiteHide
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Hardness:
VHN20=140 - 185 kg/mm2 - Vickers
Density:
11.96 g/cm3 (Calculated)
Optical Data of ChangchengiteHide
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Reflectivity:
| Wavelength | R |
|---|---|
| 400nm | 43.3% |
| 440nm | 45.5% |
| 480nm | 46.4% |
| 520nm | 46.9% |
| 560nm | 47.3% |
| 600nm | 47.7% |
| 640nm | 47.6% |
| 680nm | 47.3% |
| 700nm | 47.3% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 47.7%.
Colour in reflected light:
Bright white with a yellowish tint
Chemistry of ChangchengiteHide
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Crystallography of ChangchengiteHide
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Class (H-M):
23 - Tetartoidal
Cell Parameters:
a = 6.164(3) Å
Unit Cell V:
234.20 ų (Calculated from Unit Cell)
X-Ray Powder DiffractionHide
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Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.75 Å | (70) |
| 2.51 Å | (60) |
| 1.860 Å | (100) |
| 1.090 Å | (50) |
| 1.027 Å | (50) |
Geological EnvironmentHide
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Type Occurrence of ChangchengiteHide
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General Appearance of Type Material:
Aggregates to 0.2 mm, and as veinlets to 0.2 mm width and 1.0 mm length.
Place of Conservation of Type Material:
National Geological Museum of China, Beijing, China.
Geological Setting of Type Material:
Associated Minerals at Type Locality:
Reference:
Yu, Z. (1997) Changchengite - A new iridium bismuthide sulfide. Acta Geologica Sinica: 71(4): 336-339.
Synonyms of ChangchengiteHide
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Other Language Names for ChangchengiteHide
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Relationship of Changchengite to other SpeciesHide
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Other Members of this group:
Related Minerals - Strunz-mindat GroupingHide
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| 2.EB. | Iridarsenite | (Ir,Ru)As2 | Mon. 2/m : _P_21/b |
|---|---|---|---|
| 2.EB. | Selenolaurite | RuSe2 | Iso. m_3(2/m_3) : P _a_3 |
| 2.EB. | Andrieslombaardite | RhSbS | Iso. 23 : _P_213 |
| 2.EB. | Kanatzidisite | (SbBiS3)2Te2 | Mon. 2/m : _P_21/m |
| 2.EB.05a | Aurostibite | AuSb2 | Iso. m_3(2/m_3) : P _a_3 |
| 2.EB.05b | Bambollaite | Cu(Se,Te)2 | Tet. |
| 2.EB.05a | Cattierite | CoS2 | Iso. m_3(2/m_3) : P _a_3 |
| 2.EB.05a | Erlichmanite | OsS2 | Iso. m_3(2/m_3) : P _a_3 |
| 2.EB.05a | Fukuchilite | Cu3FeS8 | Iso. m_3(2/m_3) : P _a_3 |
| 2.EB.05a | Geversite | PtSb2 | Iso. m_3(2/m_3) : P _a_3 |
| 2.EB.05a | Hauerite | MnS2 | Iso. m_3(2/m_3) : P _a_3 |
| 2.EB.05a | Insizwaite | Pt(Bi,Sb)2 | Iso. m_3(2/m_3) : P _a_3 |
| 2.EB.05a | Krut'aite | CuSe2 | Iso. m_3(2/m_3) : P _a_3 |
| 2.EB.05a | Laurite | RuS2 | Iso. m_3(2/m_3) : P _a_3 |
| 2.EB.05a | Penroseite | (Ni,Co,Cu)Se2 | Iso. m_3(2/m_3) : P _a_3 |
| 2.EB.05a | Pyrite | FeS2 | Iso. m_3(2/m_3) : P _a_3 |
| 2.EB.05a | Sperrylite | PtAs2 | Iso. m_3(2/m_3) : P _a_3 |
| 2.EB.05a | Trogtalite | CoSe2 | Iso. m_3(2/m_3) : P _a_3 |
| 2.EB.05a | Vaesite | NiS2 | Iso. m_3(2/m_3) : P _a_3 |
| 2.EB.05a | Villamanínite | (Cu,Ni,Co,Fe)S2 | Tric. |
| 2.EB.05a | Dzharkenite | FeSe2 | Iso. m_3(2/m_3) : P _a_3 |
| 2.EB.05a | Gaotaiite | Ir3Te8 | Iso. m_3(2/m_3) : P _a_3 |
| 2.EB.05a v | Cayeuxite | ||
| 2.EB.10b | Alloclasite | Co1-xFexAsS | Mon. 2 : _P_21 |
| 2.EB.10d | Costibite | CoSbS | Orth. m _m_2 : P m _n_21 |
| 2.EB.10a | Ferroselite | FeSe2 | Orth. m m m _(_2/_m_2/_m_2/m ) : P n n m |
| 2.EB.10a | Frohbergite | FeTe2 | Orth. m m m _(_2/_m_2/_m_2/m ) : P n n m |
| 2.EB.10c | Glaucodot | (Co0.50Fe0.50)AsS | Orth. m _m_2 : P m _n_21 |
| 2.EB.10a | Kullerudite | NiSe2 | Orth. m m m _(_2/_m_2/_m_2/m ) : P n n m |
| 2.EB.10a | Marcasite | FeS2 | Orth. m m m _(_2/_m_2/_m_2/m ) : P n n m |
| 2.EB.10a | Mattagamite | CoTe2 | Orth. m m m _(_2/_m_2/_m_2/m ) : P n n m |
| 2.EB.10e | Paracostibite | CoSbS | Orth. m m m _(_2/_m_2/_m_2/m ) : P b c a |
| 2.EB.10e | Pararammelsbergite | NiAs2 | Orth. m m m _(_2/_m_2/_m_2/m ) : P b c a |
| 2.EB.10f | Oenite | CoSbAs | Orth. |
| 2.EB.10a | Petříčekite | CuSe2 | Orth. m m m _(_2/_m_2/_m_2/m ) : P n n m |
| 2.EB.15a | Anduoite | (Ru,Os)As2 | Orth. |
| 2.EB.15a | Clinosafflorite | CoAs2 | Mon. 2/m : _P_21/m |
| 2.EB.15a | Löllingite | FeAs2 | Orth. m m m _(_2/_m_2/_m_2/m ) : P n n m |
| 2.EB.15a | Nisbite | NiSb2 | Orth. m m m _(_2/_m_2/_m_2/m ) : P n n m |
| 2.EB.15a | Omeiite | (Os,Ru)As2 | Orth. |
| 2.EB.15c | Paxite | CuAs2 | Mon. 2/m : _P_21/b |
| 2.EB.15a | Rammelsbergite | NiAs2 | Orth. m m m _(_2/_m_2/_m_2/m ) : P n n m |
| 2.EB.15a | Safflorite | (Co,Ni,Fe)As2 | Orth. m m m _(_2/_m_2/_m_2/m ) : P n n m |
| 2.EB.15b | Seinäjokite | FeSb2 | Orth. |
| 2.EB.20 | Arsenopyrite | FeAsS | Mon. 2/m : _P_21/b |
| 2.EB.20 | Gudmundite | FeSbS | Mon. 2/m : _P_21/b |
| 2.EB.20 | Osarsite | (Os,Ru)AsS | Mon. |
| 2.EB.20 | Ruarsite | (Ru,Os)AsS | Mon. |
| 2.EB.25 va | Antimony-bearing Gersdorffite | Ni(As,Sb)S | |
| 2.EB.25 | Cobaltite | CoAsS | Orth. m _m_2 : P c _a_21 |
| 2.EB.25 | Gersdorffite | NiAsS | Iso. m_3(2/m_3) : P _a_3 |
| 2.EB.25 | Hollingworthite | (Rh,Pt,Pd)AsS | Iso. m_3(2/m_3) : P _a_3 |
| 2.EB.25 | Irarsite | (Ir,Ru,Rh,Pt)AsS | Iso. m_3(2/m_3) : P _a_3 |
| 2.EB.25 | Jolliffeite | NiAsSe | Iso. m_3(2/m_3) : P _a_3 |
| 2.EB.25 | Krutovite | NiAs2 | Iso. 23 : _P_213 |
| 2.EB.25 | Maslovite | PtBiTe | Iso. 23 : _P_213 |
| 2.EB.25 | Michenerite | PdBiTe | Iso. 23 : _P_213 |
| 2.EB.25 | Padmaite | PdBiSe | Iso. 432 |
| 2.EB.25 | Platarsite | Pt(As,S)2 | Iso. m_3(2/m_3) : P _a_3 |
| 2.EB.25 | Testibiopalladite | PdSbTe | Iso. |
| 2.EB.25 | Tolovkite | IrSbS | Iso. |
| 2.EB.25 | Ullmannite | NiSbS | Iso. 23 : _P_213 |
| 2.EB.25 | Willyamite | CoSbS | |
| 2.EB.25 | Mayingite | IrBiTe | Iso. m_3(2/m_3) : P _a_3 |
| 2.EB.25 | Kalungaite | PdAsSe | Iso. m_3(2/m_3) : P _a_3 |
| 2.EB.25 | Milotaite | PdSbSe | Iso. 23 : _P_213 |
| 2.EB.25 | Paragersdorffite | Ni(As,S)2 | Iso. m_3(2/m_3) : P _a_3 |
| 2.EB.25 | Orthogersdorffite | NiAsS | Orth. m _m_2 : P c _a_21 |
| 2.EB.25 | Kvačekite | NiSbSe | Iso. 23 : _P_213 |
| 2.EB.30 | Urvantsevite | Pd(Bi,Pb)2 | Tet. 4/m m m _(_4/_m_2/_m_2/m ) : _I_4/m m m |
| 2.EB.35 | Rheniite | ReS2 | Tric. 1 : _P_1 |
Other InformationHide
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Notes:
Insoluble in HNO3, HCl, and H3PO4
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 ChangchengiteHide
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References for ChangchengiteHide
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Localities for ChangchengiteHide
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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
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- 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.
| China (TL) | |
|---|---|
| Hebei Chengde Chengde County Gaositai ⓘ Gaositai Cr-PGE deposit (Gao District; Gaotai village) (TL) | Yu (1997) +1 other reference |
| ⓘ Wulie river placers (TL) | Yu (1997) +1 other reference |