Bergenite
A valid IMA mineral species - grandfathered
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About Bergenite
Formula:
Ca2Ba4(UO2)9(PO4)6O6 · 16H2O
Colour:
Yellow
Specific Gravity:
4.82 (Calculated)
Crystal System:
Monoclinic
Member of:
Name:
Named in 1959 by Hans Wilhelm Bültemann and Gunter Harald Moh for the region near type locality Bergen, Saxony, Germany. The artificial compound was synthesized in 1956 by V. Ross and was called barium-phosphuranylite.
Type Locality:
This page provides mineralogical data about Bergenite.
Unique Identifiers
Mindat ID:
631
Long-form identifier:
mindat:1:1:631:0
GUID
(UUID V4):
(UUID V4):
cb5916e8-5f18-4ec5-89be-8131fee05732
IMA Classification of Bergenite
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
Ca2Ba4(UO2)9O6(PO4)6 · 16H2O
First published:
1959
Classification of Bergenite
8.EC.40
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
42.4.5.3
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
19.11.20
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 |
---|---|---|
Bgn | 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 Bergenite
Transparency:
Translucent
Colour:
Yellow
Streak:
Pale yellow
Density:
4.82 g/cm3 (Calculated)
Optical Data of Bergenite
Type:
Biaxial (-)
RI values:
nα = 1.660 nβ = 1.700 - 1.710 nγ = 1.722
Max Birefringence:
δ = 0.062
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:
weak
Chemistry of Bergenite
Mindat Formula:
Ca2Ba4(UO2)9(PO4)6O6 · 16H2O
Crystallography of Bergenite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Cell Parameters:
a = 10.092 Å, b = 17.245 Å, c = 17.355 Å
β = 113.678°
β = 113.678°
Ratio:
a:b:c = 0.585 : 1 : 1.006
Unit Cell V:
2766.2 ų
Z:
2
Morphology:
Thin tabular.
Comment:
Data from Locock and Burns (2003)
Crystal Structure
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2x2x2 | 3x3x3 | 4x4x4
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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) |
---|---|---|---|---|---|---|---|
0005828 | Bergenite | Locock A J, Burns P C (2003) The crystal structure of bergenite, a new geometrical isomer of the phosphuranylite group The Canadian Mineralogist 41 91-101 | 2003 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
7.73 Å | (100) |
3.837 Å | (80) |
3.054 Å | (60) |
2.874 Å | (50) |
2.826 Å | (50) |
8.54 Å | (40) |
3.742 Å | (40) |
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] | |
47f : [Uranyl (U⁶⁺) minerals] |
Type Occurrence of Bergenite
Place of Conservation of Type Material:
No designated type material.
Associated Minerals at Type Locality:
Reference:
Bültemann, H.W., Moh, G.H. (1959) Bergenit, ein neues Mineral der Phosphuranylit-Gruppe. Neues Jahrbuch für Mineralogie, Monatshefte: 1959: 232-233.
Synonyms of Bergenite
Other Language Names for Bergenite
Relationship of Bergenite to other Species
Member of:
Other Members of this group:
Althupite | AlTh(UO2)7(PO4)4(OH)5O2 · 15H2O | Tric. 1 : P1 |
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) |
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 Bergenite associated with Quartz | SiO2 |
1 photo of Bergenite associated with Baryte | BaSO4 |
1 photo of Bergenite associated with Metatorbernite | Cu(UO2)2(PO4)2 · 8H2O |
1 photo of Bergenite associated with Plumbogummite Group |
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.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 |
Fluorescence of Bergenite
Weak orange-brown in short- and long-wave ultraviolet light.
Other Information
Notes:
Radioactive
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 Bergenite
mindat.org URL:
https://www.mindat.org/min-631.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for Bergenite
Reference List:
Ross, Virginia (1956) Studies of uranium minerals (XXII): Synthetic calcium and lead uranyl phosphate minerals. American Mineralogist, 41 (11-12) 915-926
Cabri, Louis J., Fleischer, Michael, Pabst, Adolf (1981) New Mineral Names. American Mineralogist, 66 (9-10) 1099-1103 p.1102
Localities for Bergenite
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.
France | |
| 54 (in German) +1 other reference |
Germany | |
| |
| Wittern (2001) |
| Hajek (2010) |
| Bültemann et al. (1959) |
| Tröger (2006) +1 other reference |
| "Sigurd Stordal" Collection (E-Rocks) |
Wittern (2001) | |
USA | |
| Min News 13:7 p2 |
Quick NavTopAbout BergeniteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesRelationshipsCommon AssociatesStrunz-MindatFluorescence Other InformationInternet Links References Localities Locality List
Ste Barbe vein, Montmins mining district, Échassières, Vichy, Allier, Auvergne-Rhône-Alpes, France