Hügelite
A valid IMA mineral species - grandfathered
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About Hügelite
Friedrich von Hugel
Formula:
Pb2(UO2)3(AsO4)2O2 · 5H2O
Colour:
Brown, orange-yellow, yellowish brown
Lustre:
Adamantine, Greasy
Hardness:
2 - 3
Specific Gravity:
5.1
Crystal System:
Monoclinic
Member of:
Name:
After Baron Friedrich von Hügel (1852–1925), Austrian-British theologian.
This page provides mineralogical data about Hügelite.
Unique Identifiers
Mindat ID:
1942
Long-form identifier:
mindat:1:1:1942:8
GUID
(UUID V4):
(UUID V4):
ef9c7a8b-a6e7-47ab-a78c-6a9b3a6848cb
IMA Classification of Hügelite
Approved, 'Grandfathered' (first described prior to 1959)
First published:
1914
Classification of Hügelite
8.EC.15
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
42.4.5.2
42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
4 : (AB)5(XO4)2Zq·xH2O
42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
4 : (AB)5(XO4)2Zq·xH2O
20.7.16
20 : Arsenates (also arsenates with phosphate, but without other anions)
7 : Arsenates of U
20 : Arsenates (also arsenates with phosphate, but without other anions)
7 : Arsenates 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 |
|---|---|---|
| Hüg | 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 Hügelite
Adamantine, Greasy
Transparency:
Transparent, Translucent
Colour:
Brown, orange-yellow, yellowish brown
Streak:
Light yellow
Hardness:
2 - 3 on Mohs scale
Tenacity:
Brittle
Cleavage:
Distinct/Good
Good on {100}
Probable on {110}
Good on {100}
Probable on {110}
Fracture:
Conchoidal
Density:
5.1 g/cm3 (Measured) 5.8 g/cm3 (Calculated)
Optical Data of Hügelite
Type:
Biaxial (+)
RI values:
nα = 1.898 nγ = 1.915
2V:
Measured: 25°
Max Birefringence:
δ = 0.017
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:
Moderate
Dispersion:
r > v extreme
Pleochroism:
Strong
Comments:
X= yellow
Y= yellow with orange tint
Z= colorless to pale yellow
Y= yellow with orange tint
Z= colorless to pale yellow
Chemistry of Hügelite
Mindat Formula:
Pb2(UO2)3(AsO4)2O2 · 5H2O
Crystallography of Hügelite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/m
Setting:
P1 21/m 1
Cell Parameters:
a = 7.0189(7) Å, b = 17.1374(10) Å, c = 8.1310(10) Å
β = 108.904(10)°
β = 108.904(10)°
Ratio:
a:b:c = 0.41 : 1 : 0.474
Unit Cell V:
925.29 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Crystals prismatic [001], with {110}, {001} and {011}.
Twinning:
Twinning by reticular merohedry, mirror in [100]
Comment:
Cell parameters from Plášil et al. (2021)
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.73 Å | (100b) |
| 3.06 Å | (90) |
| 3.00 Å | (70) |
| 2.89 Å | (70) |
| 1.833 Å | (70) |
| 4.33 Å | (60b) |
| 2.70 Å | (60) |
Comments:
Michael mine, Germany.
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] | |
| 47f : [Uranyl (U⁶⁺) minerals] |
Type Occurrence of Hügelite
General Appearance of Type Material:
Aggregates of fine, tangled needles. Sometimes in radial arrangements.
Geological Setting of Type Material:
Secondary mineral in hornstone breccia
Reference:
Dürrfeld, V. (1914) Uber einige bemerkenswerte Mineralvorkommen des neues wasserhaltiges (Schwarzwald). 4. Hügelit, ein neues wasserhaltigen Blei-Zink-Vanadinits von Reichenbach bei Lahr [On the remarkable mineral occurrences of Kinzigtales. 4. Hügelite, a new water-bearing lead zinc vanadate from Reichenbach near Lahr]. Zeitschrift fur Kristallographie: 53: 182-183.
Synonyms of Hügelite
Other Language Names for Hügelite
Relationship of Hügelite 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 |
| 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) |
| Yingjiangite | K2Ca(UO2)7(PO4)4(OH)6 · 6H2O | Orth. mmm (2/m 2/m 2/m) : Cmcm |
Common Associates
Associated Minerals Based on Photo Data:
| 3 photos of Hügelite associated with Widenmannite | Pb2(OH)2[(UO2)(CO3)2] |
| 2 photos of Hügelite associated with Hallimondite | Pb2(UO2)(AsO4)2 · nH2O |
| 1 photo of Hügelite associated with Pyromorphite | Pb5(PO4)3Cl |
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 | Yingjiangite | K2Ca(UO2)7(PO4)4(OH)6 · 6H2O |
| 8.EC.10 | Renardite | Pb(UO2)4(PO4)2(OH)4 · H2O |
| 8.EC.15 | Dumontite | Pb2(UO2)3O2(PO4)2 · 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 |
Other Information
Health Risks:
Radioactive
Internet Links for Hügelite
mindat.org URL:
https://www.mindat.org/min-1942.html
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External Links:
References for Hügelite
Reference List:
Jambor, John L., Burke, Ernst A. J. (1989) New Mineral Names. American Mineralogist, 74 (11-12) 1399-1404 see dumontite
Burns, Peter C. (2005) U6+ minerals and inorganic compounds: insights into an expanded structural hierarchy of crystal structures. The Canadian Mineralogist, 43 (6) 1839-1894 doi:10.2113/gscanmin.43.6.1839
Plášil, Jakub, Petříček, Václav, Škácha, Pavel (2021) Crystal structure of the uranyl arsenate mineral hügelite, Pb2(UO2)3O2(AsO4)2(H2O)5, revisited: a correct unit cell, twinning and hydrogen bonding. Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials, 77 (3) 378-383 doi:10.1107/s2052520621004091
Localities for Hügelite
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.
Czech Republic | |
| Plášil, Jakub, Petříček, Václav, Škácha, Pavel (2021) Crystal structure of the uranyl arsenate mineral hügelite, Pb2(UO2)3O2(AsO4)2(H2O)5, revisited: a correct unit cell, twinning and hydrogen bonding. Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials, 77 (3) 378-383 doi:10.1107/s2052520621004091 |
France | |
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Germany | |
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Bühlskopf U deposit, Ellweiler, Birkenfeld, Birkenfeld, Rhineland-Palatinate, Germany