Yingjiangite
A valid IMA mineral species
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About Yingjiangite
Formula:
K2Ca(UO2)7(PO4)4(OH)6 · 6H2O
Colour:
Yellow, golden-yellow
Lustre:
Sub-Adamantine, Sub-Vitreous, Resinous
Hardness:
3 - 4
Specific Gravity:
4.15
Crystal System:
Orthorhombic
Member of:
Name:
Named in 1990 by Zhangru Chen, zuzhu Huang, and Xiaofa Gu for its discovery locality in Yingjiang County, Yunnan Province, China. Doubt was cast on the species by Coutinho, J. M. V. and Atencio, D. (2000).
Isostructural with:
Phosphuranylite Group.
Easily confused with Phosphuranylite. Possibly identical to phosphuranylite (Coutinho and Atencio, 2000; Plášil et al., 2009).
Easily confused with Phosphuranylite. Possibly identical to phosphuranylite (Coutinho and Atencio, 2000; Plášil et al., 2009).
Unique Identifiers
Mindat ID:
4362
Long-form identifier:
mindat:1:1:4362:1
GUID
(UUID V4):
(UUID V4):
20323d8e-3a56-42fd-b02b-a6ff6a1ea422
IMA Classification of Yingjiangite
Approved
Approval year:
1989
Classification of Yingjiangite
8.EC.10
8 : PHOSPHATES, ARSENATES, VANADATES
E : Uranyl phosphates and arsenates
C : UO2:RO4 = 3:2
8 : PHOSPHATES, ARSENATES, VANADATES
E : Uranyl phosphates and arsenates
C : UO2:RO4 = 3:2
42.6.12.1
42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
6 : A2(XO4)Zq·xH2O
42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
6 : A2(XO4)Zq·xH2O
19.11.7
19 : Phosphates
11 : Phosphates of U
19 : Phosphates
11 : Phosphates of U
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 |
---|---|---|
Yin | 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 Yingjiangite
Sub-Adamantine, Sub-Vitreous, Resinous
Transparency:
Transparent, Translucent
Colour:
Yellow, golden-yellow
Streak:
Pale yellow
Hardness:
3 - 4 on Mohs scale
Hardness Data:
Measured
Tenacity:
Brittle
Cleavage:
None Observed
Density:
4.15 g/cm3 (Measured) 4.17 g/cm3 (Calculated)
Optical Data of Yingjiangite
Type:
Biaxial (-)
RI values:
nα = 1.666 - 1.669 nβ = 1.692 - 1.703 nγ = 1.707 - 1.710
2V:
Measured: 36° to 38°, Calculated: 36°
Birefringence:
0.041
Max Birefringence:
δ = 0.041
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:
High
Dispersion:
r > v or r < v
Optical Extinction:
Parallel
Pleochroism:
Visible
Comments:
X = almost colorless
Y = pale yellow
Z = yellow
Orientation: Length-slow
Y = pale yellow
Z = yellow
Orientation: Length-slow
Chemistry of Yingjiangite
Mindat Formula:
K2Ca(UO2)7(PO4)4(OH)6 · 6H2O
Common Impurities:
Na,Mg,Mn,Fe,Ti,Si
Crystallography of Yingjiangite
Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Cmcm
Cell Parameters:
a = 15.707 Å, b = 17.424 Å, c = 13.692 Å
Ratio:
a:b:c = 0.901 : 1 : 0.786
Unit Cell V:
3,747.21 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Yellow crusts and fine-grained coating, also acicular crystals <1 mm.
Comment:
Space group reported as C222[sub]1[/sub] (by analogy with phosphuranylite; cell: a = 13.73(1), b = 15.99(1), c = 17.33(2) A) and as Bmmb (cell data given on Mindat refer to this space group). The crystal structure has not been solved yet.
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
8.03 Å | (100) |
5.90 Å | (40) |
3.99 Å | (90) |
3.88 Å | (40) |
3.45 Å | (40) |
3.17 Å | (70) |
3.10 Å | (70) |
2.886 Å | (60) |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 7: Great Oxidation Event | <2.4 |
47a : [Near-surface hydration of prior minerals] | |
47c : [Carbonates, phosphates, borates, nitrates] | |
47d : [Arsenates, antimonates, selenates, bismuthinates] |
Type Occurrence of Yingjiangite
General Appearance of Type Material:
granular massive
Place of Conservation of Type Material:
National Geological Museum, Beijing, China
Geological Setting of Type Material:
oxidized zone of a uranium deposit
Associated Minerals at Type Locality:
Synonyms of Yingjiangite
Other Language Names for Yingjiangite
German:Yingjiangit
Spanish:Yingjiangita
Relationship of Yingjiangite to other Species
Member of:
Other Members of this group:
Althupite | AlTh(UO2)7(PO4)4(OH)5O2 · 15H2O | Tric. 1 : P1 |
Bergenite | Ca2Ba4(UO2)9(PO4)6O6 · 16H2O | Mon. 2/m : P21/b |
Dewindtite | H2Pb3(UO2)6O4(PO4)4 · 12H2O | Orth. mmm (2/m 2/m 2/m) : Cmma |
Dumontite | Pb2(UO2)3O2(PO4)2 · 5H2O | Mon. 2/m : P21/m |
Françoisite-(Ce) | (Ce,Nd,Ca)(UO2)3(PO4)2O(OH) · 6H2O | Mon. 2/m : P21/b |
Françoisite-(Nd) | (Nd,Ce,Sm)(UO2)3(PO4)2O(OH) · 6H2O | Mon. 2/m |
Hügelite | Pb2(UO2)3(AsO4)2O2 · 5H2O | Mon. 2/m : P21/m |
Phosphuranylite | KCa(H3O)3(UO2)7(PO4)4O4 · 8H2O | Orth. mmm (2/m 2/m 2/m) : Cmcm |
Phuralumite | Al2[(UO2)3(PO4)2O(OH)](OH)3(H2O)9 | Mon. 2/m |
Phurcalite | Ca2(UO2)3(PO4)2O2 · 7H2O | Orth. mmm (2/m 2/m 2/m) : Pbca |
Upalite | Al(UO2)3(PO4)2O(OH) · 7H2O | Mon. 2/m : P21/b |
Vanmeersscheite | U6+(UO2)3(PO4)2(OH)6 · 4H2O | Orth. mmm (2/m 2/m 2/m) |
Common Associates
Associated Minerals Based on Photo Data:
4 photos of Yingjiangite associated with Meta-autunite | Ca(UO2)2(PO4)2 · 6H2O |
4 photos of Yingjiangite associated with Saléeite | Mg(UO2)2(PO4)2 · 10H2O |
2 photos of Yingjiangite associated with Becquerelite | Ca(UO2)6O4(OH)6 · 8H2O |
2 photos of Yingjiangite associated with Phosphuranylite | KCa(H3O)3(UO2)7(PO4)4O4 · 8H2O |
Related Minerals - Strunz-mindat Grouping
8.EC.05 | Françoisite-(Nd) | (Nd,Ce,Sm)(UO2)3(PO4)2O(OH) · 6H2O |
8.EC.05 | Phuralumite | Al2[(UO2)3(PO4)2O(OH)](OH)3(H2O)9 |
8.EC.05 | Upalite | Al(UO2)3(PO4)2O(OH) · 7H2O |
8.EC.05 | Françoisite-(Ce) | (Ce,Nd,Ca)(UO2)3(PO4)2O(OH) · 6H2O |
8.EC.10 | Arsenuranylite | Ca(UO2)4(AsO4)2(OH)4 · 6H2O |
8.EC.10 | Dewindtite | H2Pb3(UO2)6O4(PO4)4 · 12H2O |
8.EC.10 | Kivuite | Th(UO2)4(PO3OH)2(OH)8 · 7H2O |
8.EC.10 | Phosphuranylite | KCa(H3O)3(UO2)7(PO4)4O4 · 8H2O |
8.EC.10 | Renardite | Pb(UO2)4(PO4)2(OH)4 · H2O |
8.EC.15 | Dumontite | Pb2(UO2)3O2(PO4)2 · 5H2O |
8.EC.15 | Hügelite | Pb2(UO2)3(AsO4)2O2 · 5H2O |
8.EC.20 | Metavanmeersscheite | U6+(UO2)3(PO4)2(OH)6 · 2H2O |
8.EC.20 | Vanmeersscheite | U6+(UO2)3(PO4)2(OH)6 · 4H2O |
8.EC.20 | Arsenovanmeersscheite | U6+(UO2)3(AsO4)2(OH)6 · 4H2O |
8.EC.25 | Althupite | AlTh(UO2)7(PO4)4(OH)5O2 · 15H2O |
8.EC.30 | Mundite | Al(UO2)3(PO4)2(OH)3 · 5.5H2O |
8.EC.35 | Phurcalite | Ca2(UO2)3(PO4)2O2 · 7H2O |
8.EC.40 | Bergenite | Ca2Ba4(UO2)9(PO4)6O6 · 16H2O |
Fluorescence of Yingjiangite
weak yellowish green under SW UV
Other Information
Health Risks:
Radioactive
Internet Links for Yingjiangite
mindat.org URL:
https://www.mindat.org/min-4362.html
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References for Yingjiangite
Localities for Yingjiangite
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.
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Tirpersdorf, Vogtlandkreis, Saxony, Germany