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
GUID
(UUID V4):
(UUID V4):
a73fd0b5-e9c9-42cb-90bc-7e4030ca060a
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 |
---|---|---|
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 = 2.000 nβ = 2.145
Max Birefringence:
δ = 2.000
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
relatively weak
Reflectivity:
Wavelength | R |
---|---|
470nm | 14.84% |
546nm | 13.03% |
589nm | 13.25% |
650nm | 13.64% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 14.84%.
Chemistry of Pingguite
Mindat Formula:
Bi6Te2O15
Originally assumed to be Bi6Te4+2O13.
Originally assumed to be Bi6Te4+2O13.
Elements listed:
Crystallography of Pingguite
Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/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. | 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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Please feel free to link to this page.
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External Links:
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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
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.
China (TL) | |
| Zhifu Sun et al. (1994) |
Poland | |
| Parafiniuk J. 2003: Secondary bismuth and tellurium minerals from Rędziny (SW Poland) +1 other reference |
Russia | |
| Sidorov et al. (2007, November) |
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