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Bergenite

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Formula:
Ca2Ba4(UO2)9(PO4)6O6 · 16H2O
System:
Monoclinic
Colour:
Yellow
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.
Isostructural with:
This page provides mineralogical data about Bergenite.

Classification of Bergenite

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
8.EC.40

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
19.11.20

19 : Phosphates
11 : Phosphates of U
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First Recorded Occurrence of Bergenite

Year of Discovery:
1959

Physical Properties of Bergenite

Colour:
Yellow
Density:
4.82 g/cm3 (Calculated)

Crystallography of Bergenite

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Cell Parameters:
a = 10.092Å, b = 17.245Å, c = 17.355Å
β = 113.678°
Ratio:
a:b:c = 0.585 : 1 : 1.006
Unit Cell Volume:
V 2766.2 ų
Z:
2

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.
Surface Relief:
High
Dispersion:
weak

Chemical Properties of Bergenite

Formula:
Ca2Ba4(UO2)9(PO4)6O6 · 16H2O
Essential elements:
All elements listed in formula:

Relationship of Bergenite to other Species

Other Members of Group:
Phosphuranylite(H3O)3KCa(UO2)7(PO4)4O4 · 8H2O
YingjiangiteK2Ca(UO2)7(PO4)4(OH)6 · 6H2O
8.EC.05Françoisite-(Nd)(Nd,Ce,Sm)(UO2)3(PO4)2O(OH) · 6H2O
8.EC.05PhuralumiteAl2(UO2)3(PO4)3(OH)2 · 13H2O
8.EC.05UpaliteAl(UO2)3(PO4)2O(OH) · 7H2O
8.EC.05Françoisite-(Ce)(Ce,Nd,Ca)(UO2)3(PO4)2O(OH) · 6H2O
8.EC.10ArsenuranyliteCa(UO2)4(AsO4)2(OH)4 · 6H2O
8.EC.10DewindtiteH2Pb3(UO2)2(PO4)4O4 · 12H2O
8.EC.10Kivuite(Th,Ca,Pb)(UO2)4(HPO4)2(OH)8 · 7H2O
8.EC.10Phosphuranylite(H3O)3KCa(UO2)7(PO4)4O4 · 8H2O
8.EC.10YingjiangiteK2Ca(UO2)7(PO4)4(OH)6 · 6H2O
8.EC.15DumontitePb2(UO2)3(PO4)2(OH)4 · 3H2O
8.EC.15HügelitePb2(UO2)3(AsO4)2O2 · 5H2O
8.EC.20MetavanmeersscheiteU6+(UO2)3(PO4)2(OH)6 · 2H2O
8.EC.20VanmeersscheiteU6+(UO2)3(PO4)2(OH)6 · 4H2O
8.EC.20ArsenovanmeersscheiteU4+(UO2)3(AsO4)2(OH)2 · 4H2O
8.EC.25AlthupiteAlTh(UO2)7(PO4)4(OH)5O2 · 15H2O
8.EC.30MunditeAl(UO2)3(PO4)2(OH)3 · 5.5H2O
8.EC.35PhurcaliteCa2(UO2)3(PO4)2O2 · 7H2O
19.11.1LermontoviteU(PO4)(OH) · H2O
19.11.2MetavanmeersscheiteU6+(UO2)3(PO4)2(OH)6 · 2H2O
19.11.3VanmeersscheiteU6+(UO2)3(PO4)2(OH)6 · 4H2O
19.11.4Chernikovite(H3O)2(UO2)2(PO4)2 · 6H2O
19.11.5VyacheslaviteU(PO4)(OH) · nH2O
19.11.6MetanatroautuniteNa(UO2)(PO4)(H2O)3
19.11.7YingjiangiteK2Ca(UO2)7(PO4)4(OH)6 · 6H2O
19.11.8Meta-ankoleiteK2(UO2)2(PO4)2 · 6H2O
19.11.9Uramphite(NH4)2(UO2)2(PO4)2 · 6H2O
19.11.10TorberniteCu(UO2)2(PO4)2 · 12H2O
19.11.11MetatorberniteCu(UO2)2(PO4)2 · 8H2O
19.11.12SaléeiteMg(UO2)2(PO4)2 · 10H2O
19.11.13NingyoiteCaU(PO4)2 · 1-2H2O
19.11.14Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2O
19.11.15AutuniteCa(UO2)2(PO4)2 · 11H2O
19.11.16Pseudo-autunite(H3O)4Ca2(UO2)2(PO4)4 · 5H2O
19.11.17PhurcaliteCa2(UO2)3(PO4)2O2 · 7H2O
19.11.18Phosphuranylite(H3O)3KCa(UO2)7(PO4)4O4 · 8H2O
19.11.19UlrichiteCaCu(UO2)(PO4)2 · 4H2O
19.11.21Metauranocircite-IBa(UO2)2(PO4)2 · 7H2O
19.11.22UranocirciteBa(UO2)2(PO4)2 · 10H2O
19.11.23RanunculiteHAl(UO2)(PO4)(OH)3 · 4H2O
19.11.24TrianguliteAl3(UO2)4(PO4)4(OH)5 · 5H2O
19.11.25MunditeAl(UO2)3(PO4)2(OH)3 · 5.5H2O
19.11.26UpaliteAl(UO2)3(PO4)2O(OH) · 7H2O
19.11.27FurongiteAl13(UO2)7(PO4)13(OH)14 · 58H2O
19.11.28ThreadgolditeAl(UO2)2(PO4)2(OH) · 8H2O
19.11.29PhuralumiteAl2(UO2)3(PO4)3(OH)2 · 13H2O
19.11.30MoreauiteAl3(UO2)(PO4)3(OH)2 · 13H2O
19.11.31SabugaliteHAl(UO2)4(PO4)4 · 16H2O
19.11.32Uranospathite(Al,☐)(UO2)2(PO4)2F · 20(H2O,F)
19.11.33AlthupiteAlTh(UO2)7(PO4)4(OH)5O2 · 15H2O
19.11.34Françoisite-(Nd)(Nd,Ce,Sm)(UO2)3(PO4)2O(OH) · 6H2O
19.11.35Kivuite(Th,Ca,Pb)(UO2)4(HPO4)2(OH)8 · 7H2O
19.11.36ParsonsitePb2(UO2)(PO4)2 · 2H2O
19.11.37DewindtiteH2Pb3(UO2)2(PO4)4O4 · 12H2O
19.11.38DumontitePb2(UO2)3(PO4)2(OH)4 · 3H2O
19.11.39PrzhevalskitePb2(UO2)3(PO4)2(OH)4 · 3H2O
19.11.40LehneriteMn2+(UO2)2(PO4)2 · 8H2O
19.11.41BassetiteFe2+(UO2)2(PO4)2 · 8H2O
19.11.42Vochtenite(Fe2+,Mg)Fe3+(UO2)4(PO4)4(OH) · 12-13H2O

Other Names for Bergenite

Name in Other Languages:
German:Bergenit
Spanish:Bergenita

Other Information

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Bergenite

Reference List:
American Mineralogist (1960): 45: 909.

American Mineralogist (1981): 66: 1102.

Bültemann, H. W. & G. H. Moh (1959): Bergenit, ein neues Mineral der Phosphuranylit-Gruppe. Neues Jahrbuch für Mineralogie, Monatshefte, 1959, 232-233.

Piret, P. & Deliens, M. (1981): New data for holotype bergenite. Bulletin de Minéralogie 104, 16-18. (in French)

Locock, A. J. & Burns, P. C. (2003c): The crystal structure of bergenite, a new geometrical isomer of the phosphuranylite group. Canadian Mineralogist: 41: 91-101.

Burns, Peter C. (2005) U 6+ minerals and inorganic compounds: insights into an expanded structural hierarchy of crystal structures. Canadian Mineralogist: 43: 1839-1894.

Internet Links for Bergenite

Localities for Bergenite

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
France
 
  • Auvergne
    • Allier
      • Ébreuil
        • Échassières
Kolitsch, U., Gröbner, J. & Brandstätter, F. (2009): Neufunde von Les Montmins, Allier, Frankreich. Lapis 34 (11), 24-32; 54 (in German).
Germany
 
  • Baden-Württemberg
    • Black Forest
      • Menzenschwand
No reference listed
  • Saxony
    • Erzgebirge
      • Johanngeorgenstadt District
Wittern: "Mineralfundorte in Deutschland", 2001
      • Marienberg District
        • Lauta
Hajek, W. (2010): Kristallwelten Marienberg. Weise Verlag, München.
    • Vogtland
      • Oelsnitz
Wittern: "Mineralfundorte in Deutschland", 2001
      • Zobes-Bergen District
        • Bergen U deposit
          • Bergen
"Sigurd Stordal" Collection, aquired from Hochwälder (E-Rocks)
H.W. Bültemann & G.H. Moh (1959) Neues Jahrbuch für Mineralogie, Monatshefte, 232-233
        • Zobes U deposit
          • Mechelgrün
Tröger, S. (2006): Uran- und Wismutmineralien von Mechelgrün im Vogtland. Lapis 31 (9), 22-24; 58. (in German)
USA
 
  • Utah
    • Emery Co.
Min News 13:7 p2
Mineral and/or Locality  
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