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Pingguite
A valid IMA mineral species
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About Pingguite
Formula:
Bi6Te2O15
Originally assumed to be Bi6Te4+2O13.
Colour:
Yellow-green
Lustre:
Adamantine, Vitreous
Hardness:
5½ - 6
Specific Gravity:
8.44
Crystal System:
Orthorhombic
Name:
Named after its locality.
Type Locality:
This page provides mineralogical data about Pingguite.
Unique Identifiers
Mindat ID:
7237
Long-form identifier:
mindat:1:1:7237:9
Similar Names
| Panguite | A valid IMA mineral species | (Ti,Al,Sc,Mg,Zr,Ca)1.8O3 |
| Pinguite | A synonym of Nontronite |
IMA Classification of Pingguite
Classification of Pingguite
4.JL.20
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
J : Arsenites, antimonites, bismuthites, sulfites, selenites, tellurites; iodates
L : Tellurites with additional anions, without H2O
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
J : Arsenites, antimonites, bismuthites, sulfites, selenites, tellurites; iodates
L : Tellurites with additional anions, without H2O
34.5.4.1
34 : SELENITES, TELLURITES AND SULFITES
5 : A(X3O8)
34 : SELENITES, TELLURITES AND SULFITES
5 : A(X3O8)
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 for Standard |
|---|---|---|
| Png | 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 Pingguite
Adamantine, Vitreous
Transparency:
Translucent
Colour:
Yellow-green
Streak:
Pale yellow-green
Hardness:
5½ - 6 on Mohs scale
Hardness:
VHN50=449 - 572 kg/mm2 - Vickers
Tenacity:
Brittle
Density:
8.44 g/cm3 (Measured) 8.64 g/cm3 (Calculated)
Optical Data of Pingguite
Type:
Biaxial
RI values:
nα = 2 nβ = 2.145
Surface Relief:
Unknown
Dispersion:
relatively weak
Reflectivity:
| Wavelength | R1 (%) |
|---|---|
| 470nm | 14.84% |
| 546nm | 13.03% |
| 589nm | 13.25% |
| 650nm | 13.64% |
Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 14.84%.
Chemistry of Pingguite
Mindat Formula:
Bi6Te2O15
Originally assumed to be Bi6Te4+2O13.
Originally assumed to be Bi6Te4+2O13.
Element Weights:
Elements listed:
Crystallography of Pingguite
Crystal System:
Orthorhombic
Class (H-M):
mmm(2/m2/m2/m) - Dipyramidal
Space Group:
Pnma
Cell Parameters:
a = 10.637(2) Å, b = 22.797(4) Å, c = 5.4136(11) Å
Ratio:
a:b:c = 0.467 : 1 : 0.237
Unit Cell V:
1,312.75 ų (Calculated from Unit Cell)
Morphology:
Granular aggregates, tiny crystals.
Comment:
Originally assumed to have a = 5.689, b = 10.791, c = 5.308 Å.
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.146 Å | (100) |
| 2.841 Å | (80) |
| 2.694 Å | (20) |
| 1.956 Å | (10) |
| 1.695 Å | (20) |
| 1.631 Å | (10) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47d : [Arsenates, antimonates, selenates, bismuthinates] | |
| 47e : [Vanadates, chromates, manganates] | |
| 47h : [Near-surface oxidized, dehydrated minerals] |
Type Occurrence of Pingguite
General Appearance of Type Material:
Granular aggregates, to 0.5 mm in diameter, that consist of tabular grains up to 0.6 µm long.
Place of Conservation of Type Material:
Geological Museum of China, Beijing, China
Geological Setting of Type Material:
Oxidation zone of a gold deposit
Associated Minerals at Type Locality:
Synonyms of Pingguite
Other Language Names for Pingguite
Related Minerals - Strunz-mindat Grouping
| 4.JL. | Chorążewiczite | Pb2Fe3+(Te6+O6)(HCO3) |
| 4.JL. | Tomiolloite | Al12(Te4+O3)5[(SO3)0.5(SO4)0.5](OH)24 |
| 4.JL.05 | Rodalquilarite | Fe2(TeO2OH)3(TeO3)Cl |
| 4.JL.10 | Mackayite | Fe3+(Te4+2O5)(OH) |
| 4.JL.15 | Mroseite | CaTe4+(CO3)O2 |
| 4.JL.25 | Tlapallite | (Ca,Pb)3CaCu6[Te4+3Te6+O12]2(Te4+O3)2(SO4)2 · 3H2O |
| 4.JL.30 | 'Girdite' | H2Pb3(Te4+O3)(Te6+O6) |
| 4.JL.40 | Bodieite | Bi2(TeO3)2(SO4) |
Other Information
Thermal Behaviour:
TGA showed no significant weight loss, and DTA showed a small endothermic peak at about 800 °C.
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 Pingguite
mindat.org URL:
https://www.mindat.org/min-7237.html
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References for Pingguite
Reference List:
Nénert, Gwilherm, Missen, Owen P., Lian, Hong, Weil, Matthias, Blake, Graeme R., Kampf, Anthony R., Mills, Stuart J. (2020) Crystal structure and thermal behavior of Bi6Te2O15: investigation of synthetic and natural pingguite. Physics and Chemistry of Minerals, 47 (12) doi:10.1007/s00269-020-01121-7
Localities for Pingguite
Showing 6 localities.
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) | |
| Zhifu Sun et al. (1994) |
Poland | |
| Parafiniuk J. (2003) +1 other reference |
Russia | |
| Sidorov et al. (2007) |
Sweden | |
| Aksel Osterlof specimen +1 other reference |
USA | |
| Collected by and in the collection of ... +1 other reference |
| In the collection of Alex Earl |
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Upper D-Site, Blue Bell Mine, Zzyzx, Soda Mountains, Silver Lake Mining District, San Bernardino County, California, USA