Ximengite
A valid IMA mineral species
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About Ximengite
Formula:
Bi(PO4)
Colour:
Colourless
Lustre:
Vitreous, Greasy
Hardness:
4½
Specific Gravity:
05.534 (Calculated)
Crystal System:
Trigonal
Name:
Named after its discovery locality, the Ximeng tin mining district, Yunnan Province, China.
Type Locality:
Dimorph of:
Two other polymorphs are known as synthetic compounds. One of them was found in Portugal recently (2024): Unnamed (Monoclinic polymorph of ximengite).
Unique Identifiers
Mindat ID:
4337
Long-form identifier:
mindat:1:1:4337:9
IMA Classification of Ximengite
Approved
Approval year:
1985
Type description reference:
Classification of Ximengite
8.AD.45
8 : PHOSPHATES, ARSENATES, VANADATES
A : Phosphates, etc. without additional anions, without H2O
D : With only large cations
8 : PHOSPHATES, ARSENATES, VANADATES
A : Phosphates, etc. without additional anions, without H2O
D : With only large cations
38.4.9.1
38 : ANHYDROUS NORMAL PHOSPHATES, ARSENATES, AND VANADATES
4 : AXO4
38 : ANHYDROUS NORMAL PHOSPHATES, ARSENATES, AND VANADATES
4 : AXO4
19.10.11
19 : Phosphates
10 : Phosphates of Pb, Th, V and Bi
19 : Phosphates
10 : Phosphates of Pb, Th, V and Bi
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 |
|---|---|---|
| Xim | 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 Ximengite
Vitreous, Greasy
Transparency:
Transparent
Colour:
Colourless
Streak:
White
Hardness:
4½ on Mohs scale
Hardness:
VHN100=279 - 283 - Vickers
Tenacity:
Brittle
Density:
05.534 g/cm3 (Calculated)
Optical Data of Ximengite
Type:
Uniaxial (+)
RI values:
nω = 1.77 nε = 1.77
Max. Birefringence:
δ = 0.000
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.
Surface Relief:
Moderate
Chemistry of Ximengite
Mindat Formula:
Bi(PO4)
Element Weights:
Elements listed:
Crystallography of Ximengite
Crystal System:
Trigonal
Class (H-M):
3 2 - Trapezohedral
Space Group:
P31 2 1
Cell Parameters:
a = 6.986(2) Å, c = 6.475(3) Å
Ratio:
a:c = 1 : 0.927
Unit Cell V:
273.67 ų (Calculated from Unit Cell)
Z:
3
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0010600 | Ximengite | Mooney-Slater R C L (1962) Polymorphic forms of bismuth phosphate Zeitschrift fur Kristallographie 117 371-385 |  | 1962 | synthetic | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.024 Å | (100) |
| 4.420 Å | (91) |
| 3.493 Å | (88) |
| 6.052 Å | (73) |
| 2.854 Å | (65) |
| 1.7474 Å | (48) |
| 2.157 Å | (47) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47c : [Carbonates, phosphates, borates, nitrates] | |
| 47h : [Near-surface oxidized, dehydrated minerals] |
Type Occurrence of Ximengite
General Appearance of Type Material:
Earthy veinlets and irregular granular aggregates of grains <0.001 to 0.1 mm in size.
Place of Conservation of Type Material:
Bureau of Geology and Mineral Resources, Kunming, China.
Geological Setting of Type Material:
Alteration of bismuthinite containing waylandite and monazite.
Associated Minerals at Type Locality:
Synonyms of Ximengite
Other Language Names for Ximengite
Common Associates
Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
| 8.AD. | Unnamed (Monoclinic polymorph of ximengite) | Bi(PO4) |
| 8.AD. | Keplerite | Ca9(Ca0.5◻0.5)Mg(PO4)7 |
| 8.AD. | Mazorite | Ba3(PO4)2 |
| 8.AD. | Deynekoite | Ca9◻Fe3+(PO4)7 |
| 8.AD. | Monazite-(Gd) | Gd(PO4) |
| 8.AD.05 | Nahpoite | Na2(PO3OH) |
| 8.AD.10 | Weilite | Ca(HAsO4) |
| 8.AD.10 | Švenekite | Ca(H2AsO4)2 |
| 8.AD.10 | Monetite | Ca(PO3OH) |
| 8.AD.15 | Archerite | (K,NH4)(H2PO4) |
| 8.AD.15 | Biphosphammite | NH4(H2PO4) |
| 8.AD.20 | Phosphammite | (NH4)2(PO3OH) |
| 8.AD.25 | Buchwaldite | NaCa(PO4) |
| 8.AD.30 | Schultenite | Pb(HAsO4) |
| 8.AD.35 | Dreyerite | Bi(VO4) |
| 8.AD.35 | Wakefieldite-(La) | La(VO4) |
| 8.AD.35 | Anningite-(Ce) | (Ca0.5Ce4+0.5)(VO4) |
| 8.AD.35 | Pretulite | Sc(PO4) |
| 8.AD.35 | Wakefieldite-(Ce) | Ce(VO4) |
| 8.AD.35 | Wakefieldite-(Y) | Y(VO4) |
| 8.AD.35 | Xenotime-(Yb) | Yb(PO4) |
| 8.AD.35 | Chernovite-(Ce) | (Ce,Y)(AsO4) |
| 8.AD.35 | Xenotime-(Gd) | Gd(PO4) |
| 8.AD.35 | Chernovite-(Y) | Y(AsO4) |
| 8.AD.35 | Xenotime-(Y) | Y(PO4) |
| 8.AD.35 | Wakefieldite-(Nd) | Nd(VO4) |
| 8.AD.40 | Pucherite | Bi(VO4) |
| 8.AD.50 | UM2005-35-VO:CaFePSiTh | (Th,Ca)(VO4,SiO4,PO4) |
| 8.AD.50 | Rooseveltite | Bi(AsO4) |
| 8.AD.50 | Gasparite-(Ce) | Ce(AsO4) |
| 8.AD.50 | Monazite-(Sm) | Sm(PO4) |
| 8.AD.50 | Monazite-(Ce) | Ce(PO4) |
| 8.AD.50 | Monazite-(La) | La(PO4) |
| 8.AD.50 | Monazite-(Nd) | Nd(PO4) |
| 8.AD.50 | Gasparite-(La) | La(AsO4) |
| 8.AD.50 | Cheralite | CaTh(PO4)2 |
| 8.AD.55 | Tetrarooseveltite | Bi(AsO4) |
| 8.AD.60 | Chursinite | [Hg2]2+Hg2+2[AsO4]2 |
| 8.AD.65 | Clinobisvanite | Bi(VO4) |
| 8.AD.70 | Gurimite | Ba3(VO4)2 |
| 8.AD.75 | Picaite | NaCa[AsO3OH][AsO2(OH)2] |
Other Information
Notes:
Yellowish green cathodoluminescence under the electron
beam.
beam.
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 Ximengite
mindat.org URL:
https://www.mindat.org/min-4337.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
References for Ximengite
Reference List:
Localities for Ximengite
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) | |
| Jiaxin Shi (1989) +1 other reference |
DR Congo | |
| analysed (EDS & P-XRD) |
Germany | |
| Dill (2009) |
Italy | |
| Biagioni et al. (2008) +1 other reference |
Poland | |
| Pieczka et al. (2015) +1 other reference |
| Kozłowski et al. (2016) |
| Kozłowski et al. (2018) |
Portugal | |
| Cepedal et al. (2013) |
Slovakia | |
| Martin Števko |
Quick NavTopAbout XimengiteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
Eta-Etu, Bapere, Lubero Territory, North Kivu, DR Congo