Zhengminghuaite
A valid IMA mineral species
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Formula:
Cu6Fe3As4S12
Lustre:
Metallic
Hardness:
4
Specific Gravity:
4.77 (Calculated)
Crystal System:
Trigonal
Name:
In honor of Prof. Zheng Minghua (born October 23, 1934), a famous geologist and expert of gold deposits from the College of Earth Sciences, Chengdu University Technology, China.
Type Locality:
Nowackiite isotypic series.
Fe-dominant analogue at the divalent cations site of nowackiite (Cu6Zn3As4S12) and aktashite (Cu6Hg3As4S12)
Fe-dominant analogue at the divalent cations site of nowackiite (Cu6Zn3As4S12) and aktashite (Cu6Hg3As4S12)
Unique Identifiers
Mindat ID:
470397
Long-form identifier:
mindat:1:1:470397:2
GUID
(UUID V4):
(UUID V4):
3f88b6f2-529a-48b0-8a00-64507c819c18
IMA Classification of Zhengminghuaite
Approved, Pending publication
Approval year:
2022
Classification of Zhengminghuaite
2.GA.30
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
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
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 |
|---|---|---|
| Zmh | 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 Zhengminghuaite
Metallic
Transparency:
Opaque
Hardness:
4 on Mohs scale
Hardness:
VHN10=219(28) kg/mm2 - Vickers
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven, Conchoidal
Density:
4.77(5) g/cm3 (Calculated)
Optical Data of Zhengminghuaite
Anisotropism:
very weak
Bireflectance:
weak - whitish gray to pinkish tinted gray
Reflectivity:
| Wavelength | R1 | R2 |
|---|---|---|
| 470nm | 28.84% | 22.11% |
| 546nm | 29.00% | 23.04% |
| 589nm | 31.71% | 26.31% |
| 650nm | 34.38% | 28.31% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 34.38%.
R1 shown in black, R2 shown in red
Colour in reflected light:
whitish gray
Internal Reflections:
none
Comments:
Anisotropy is very weak and only visible with slightly opened analyzer.
Chemistry of Zhengminghuaite
Mindat Formula:
Cu6Fe3As4S12
Elements listed:
Chemical Analysis
Empirical formulas:
| Sample ID | Empirical Formula |
|---|---|
| 1 | (Cu5.92Hg0.08)Σ6.00(Fe1.59Hg1.07Zn0.37)Σ3.03(As3.94Sb0.02)Σ3.96S11.93 |
Sample references:
| ID | Locality | Reference | Notes |
|---|---|---|---|
| 1 | Zimudang Mine, Xingren County, Qianxinan, Guizhou, China |
Crystallography of Zhengminghuaite
Crystal System:
Trigonal
Class (H-M):
3 - Pyramidal
Space Group:
R3
Cell Parameters:
a = 13.5373(2) Å, c = 9.235(1) Å
Ratio:
a:c = 1 : 0.682
Unit Cell V:
1,465.65 ų (Calculated from Unit Cell)
Z:
3
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.079 Å | (67) |
| 3.067 Å | (100) |
| 2.659 Å | (90) |
| 1.882 Å | (99) |
| 1.877 Å | (84) |
| 1.606 Å | (93) |
| 1.603 Å | (83) |
| 1.601 Å | (85) |
Comments:
From Type Description.
Type Occurrence of Zhengminghuaite
General Appearance of Type Material:
fractured grains of several to a few tens μm
Place of Conservation of Type Material:
Type material is deposited in the collections of the Geological Museum of China, No. 16, Yangrou Hutong, Xisi, Beijing 100031, People’s Republic of China, catalogue number M16136
Geological Setting of Type Material:
late ore-stage mineral assemblage in Carlin type deposit.
Associated Minerals at Type Locality:
Synonyms of Zhengminghuaite
Related Minerals - Strunz-mindat Grouping
| 2.GA. | Arsiccioite | AgHg2Tl(As,Sb)2S6 |
| 2.GA. | Eckerite | Ag2CuAsS3 |
| 2.GA. | Pyradoketosite | Ag3SbS3 |
| 2.GA.05 | Proustite | Ag3AsS3 |
| 2.GA.05 | Pyrargyrite | Ag3SbS3 |
| 2.GA.10 | Pyrostilpnite | Ag3SbS3 |
| 2.GA.10 | Xanthoconite | Ag3AsS3 |
| 2.GA.15 | Samsonite | Ag4MnSb2S6 |
| 2.GA.20 | Skinnerite | Cu3SbS3 |
| 2.GA.20 | Wittichenite | Cu3BiS3 |
| 2.GA.20 | Bytízite | Cu3SbSe3 |
| 2.GA.25 | Lapieite | NiCuSbS3 |
| 2.GA.25 | Mückeite | NiCu(Bi,Sb)S3 |
| 2.GA.25 | Malyshevite | PdCuBiS3 |
| 2.GA.25 | Lisiguangite | PtCuBiS3 |
| 2.GA.25 | Roterbärite | PdBiCuSe3 |
| 2.GA.30 | Aktashite | Cu6Hg3As4S12 |
| 2.GA.30 | Gruzdevite | Cu6Hg3Sb4S12 |
| 2.GA.30 | Nowackiite | Cu6Zn3As4S12 |
| 2.GA.35 | Laffittite | AgHgAsS3 |
| 2.GA.40 | Routhierite | Tl(Cu,Ag)(Hg,Zn)2(As,Sb)2S6 |
| 2.GA.40 | Stalderite | Tl(Cu,Ag)(Zn,Fe,Hg)2(As,Sb)2S6 |
| 2.GA.40 | Ralphcannonite | AgZn2TlAs2S6 |
| 2.GA.40 | Ferrostalderite | CuFe2TlAs2S6 |
| 2.GA.40 | Unnamed (Ag-Fe endmember of Routhierite Group) | AgFe2TlAs2S6 |
| 2.GA.45 | Erniggliite | Tl2SnAs2S6 |
| 2.GA.50 | Bournonite | PbCuSbS3 |
| 2.GA.50 | Seligmannite | PbCuAsS3 |
| 2.GA.50 | Součekite | PbCuBi(S,Se)3 |
| 2.GA.50 | Unnamed (Pb-Cu-Bi Selenide) | PbCuBiSe3 |
| 2.GA.50 | Cerromojonite | CuPbBiSe3 |
| 2.GA.55 | Eldragónite | Cu6BiSe4(Se2) |
Fluorescence of Zhengminghuaite
none observed
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 Zhengminghuaite
mindat.org URL:
https://www.mindat.org/min-470397.html
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References for Zhengminghuaite
Reference List:
Localities for Zhengminghuaite
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.
China (TL) | |
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