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Compreignacite

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About CompreignaciteHide

Formula:
K2(UO2)6O4(OH)6 · 7H2O
Colour:
Yellow
Specific Gravity:
5.03
Crystal System:
Orthorhombic
Name:
Named for the community of Compreignac, France, near the type locality.
This page provides mineralogical data about Compreignacite.


Classification of CompreignaciteHide

Approved
First Published:
1964
4.GB.05

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
G : Uranyl Hydroxides
B : With additional cations (K, Ca, Ba, Pb, etc.); with mainly UO2(O,OH)5 pentagonal polyhedra
5.7.1.1

5 : OXIDES CONTAINING URANIUM OR THORIUM
7 : AX6O19·xH2O
7.16.8

7 : Oxides and Hydroxides
16 : Oxides of U

Physical Properties of CompreignaciteHide

Transparency:
Transparent, Translucent
Colour:
Yellow
Streak:
Pale yellow
Tenacity:
Brittle
Cleavage:
Perfect
(001)
Density:
5.03(5) g/cm3 (Measured)    5.13(5) g/cm3 (Calculated)

Optical Data of CompreignaciteHide

Type:
Biaxial (-)
Dispersion:
r > v medium
Pleochroism:
Strong
Comments:
X(=c) colorless; Y(=a), Z(=b) yellow

Chemical Properties of CompreignaciteHide

Formula:
K2(UO2)6O4(OH)6 · 7H2O

Crystallography of CompreignaciteHide

Crystal System:
Orthorhombic
Cell Parameters:
a = 7.16 Å, b = 12.14 Å, c = 14.88 Å
Ratio:
a:b:c = 0.59 : 1 : 1.226
Unit Cell V:
1,293.41 ų (Calculated from Unit Cell)
Morphology:
Flattened on (001)
Twinning:
Common on (110)

Type Occurrence of CompreignaciteHide

Place of Conservation of Type Material:
University of Pierre and Marie Curie, Paris.
National School of Mines, Paris, France.
National Museum of Natural History (Smithsonian), Washington, D.C., USA, 165183.
Reference:
Protas, J. (1964) Une nouvelle espèce minérale: la compreinacite, K20·6UO3·11H2O. Bulletin de la Société française de minéralogie et de cristallographie: 87: 365-371.

Synonyms of CompreignaciteHide

Other Language Names for CompreignaciteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Uranophane1 photo of Compreignacite associated with Uranophane on mindat.org.
Agrinierite1 photo of Compreignacite associated with Agrinierite on mindat.org.
Gypsum1 photo of Compreignacite associated with Gypsum on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

4.GB.05AgrinieriteK2(Ca,Sr)[(UO2)3O3(OH)2]2 · 5H2OOrth.
4.GB.05RameauiteK2Ca(H[3]2O)(H[5]2O)4[(UO2)6O6(OH)4](H[4]2O)Mon. m : Bb
4.GB.10BecquereliteCa(UO2)6O4(OH)6 · 8H2OOrth. mm2 : Pna21
4.GB.10BillietiteBa(UO2)6O4(OH)6 · 4-8H2OOrth. mm2
4.GB.10ProtasiteBa(UO2)3O3(OH)2 · 3H2OMon.
4.GB.15Richetite(Fe3+,Mg)Pb 8.6(UO2)36O36(OH)24•41H2O Tric.
4.GB.20BauranoiteBa(UO2)2(OH)6 · 1-2H2O
4.GB.20Calciouranoite(Ca,Ba,Pb)U2O7 · 5H2O
4.GB.20Metacalciouranoite(Ca,Ba,Pb,K2)U2O7 · 2H2O
4.GB.25FourmarieritePb(UO2)4O3(OH)4 · 4H2OOrth.
4.GB.30WölsendorfitePb7(UO2)14O19(OH)4 · 12H2OOrth. mmm (2/m 2/m 2/m) : Cmcm
4.GB.35MasuyitePb(UO2)3O3(OH)2 · 3H2OOrth.
4.GB.40MetavandendriesscheitePbU7O22 · nH2O n < 12Orth.
4.GB.40VandendriesscheitePbU7O22 · 12H2O
4.GB.45VandenbrandeiteCu(UO2)(OH)4Tric. 1 : P1
4.GB.50SayritePb2(UO2)5O6(OH)2 · 4H2OMon.
4.GB.55CuritePb3(UO2)8O8(OH)6 · 3H2OOrth. mmm (2/m 2/m 2/m) : Pnma
4.GB.60Iriginite(UO2)Mo2O7 · 3H2OOrth. mmm (2/m 2/m 2/m) : Pbcm
4.GB.65UranosphaeriteBi(UO2)O2(OH)Mon. 2/m
4.GB.70HolfertiteCaxU6+2-xTi(O8-xOH4x) · 3H2OTrig. 3 : P3

Related Minerals - Dana Grouping (8th Ed.)Hide

5.7.1.2BecquereliteCa(UO2)6O4(OH)6 · 8H2OOrth. mm2 : Pna21
5.7.1.3BillietiteBa(UO2)6O4(OH)6 · 4-8H2OOrth. mm2

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

7.16.1UraniniteUO2Iso. m3m (4/m 3 2/m) : Fm3m
7.16.2Schoepite(UO2)8O2(OH)12 · 12H2OOrth. mmm (2/m 2/m 2/m) : Pbca
7.16.3ParaschoepiteUO3 · 2H2OOrth.
7.16.4Metaschoepite(UO2)8O2(OH)12 · 10H2OOrth. mmm (2/m 2/m 2/m) : Pbcn
7.16.5MetastudtiteUO4 · 2H2OOrth. mmm (2/m 2/m 2/m) : Pnma
7.16.6Studtite[(UO2)(O2)(H2O)2] · H2OMon.
7.16.7IanthiniteU4+(UO2)5O7 · 10H2OOrth. mm2 : Amm2
7.16.9VandenbrandeiteCu(UO2)(OH)4Tric. 1 : P1
7.16.10RoubaultiteCu2(UO2)3(CO3)2O2(OH)2•4H2OTric. 1 : P1
7.16.11BecquereliteCa(UO2)6O4(OH)6 · 8H2OOrth. mm2 : Pna21
7.16.12RameauiteK2Ca(H[3]2O)(H[5]2O)4[(UO2)6O6(OH)4](H[4]2O)Mon. m : Bb
7.16.13AgrinieriteK2(Ca,Sr)[(UO2)3O3(OH)2]2 · 5H2OOrth.
7.16.14ProtasiteBa(UO2)3O3(OH)2 · 3H2OMon.
7.16.15BillietiteBa(UO2)6O4(OH)6 · 4-8H2OOrth. mm2
7.16.16BauranoiteBa(UO2)2(OH)6 · 1-2H2O
7.16.17Metacalciouranoite(Ca,Ba,Pb,K2)U2O7 · 2H2O
7.16.18Calciouranoite(Ca,Ba,Pb)U2O7 · 5H2O
7.16.19OrthobranneriteU4+U6+Ti4O12(OH)2Orth.
7.16.20Thorutite(Th,U,Ca)Ti2(O,OH)6Mon.
7.16.21Davidite-(La)(La,Ce)(Y,U,Fe)(Ti,Fe)20(O,OH)38Trig.
7.16.22Davidite-(Ce)(Ce,La)(Y,U,Fe)(Ti,Fe)20(O,OH)38Trig. 3 : R3
7.16.23Brannerite(U4+,REE,Th,Ca)(Ti,Fe3+,Nb)2(O,OH)6Mon. 2/m : B2/m
7.16.24FourmarieritePb(UO2)4O3(OH)4 · 4H2OOrth.
7.16.25Richetite(Fe3+,Mg)Pb 8.6(UO2)36O36(OH)24•41H2O Tric.
7.16.26CuritePb3(UO2)8O8(OH)6 · 3H2OOrth. mmm (2/m 2/m 2/m) : Pnma
7.16.27MasuyitePb(UO2)3O3(OH)2 · 3H2OOrth.
7.16.28VandendriesscheitePbU7O22 · 12H2O
7.16.29MetavandendriesscheitePbU7O22 · nH2O n < 12Orth.
7.16.30SayritePb2(UO2)5O6(OH)2 · 4H2OMon.
7.16.31WölsendorfitePb7(UO2)14O19(OH)4 · 12H2OOrth. mmm (2/m 2/m 2/m) : Cmcm
7.16.32Clarkeite(Na,Ca,Pb)(UO2)O(OH) · 0-1H2OTrig.
7.16.33UranosphaeriteBi(UO2)O2(OH)Mon. 2/m

Other InformationHide

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 CompreignaciteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Protas, J. (1964) Une nouvelle espèce minérale: la compreinacite, K20·6UO3·11H2O. Bulletin de la Société française de minéralogie et de cristallographie: 87: 365-371.
Fleischer, M. (1965) New mineral names. American Mineralogist: 50: 807.
Burns, P.C. (1998) The structure of compreignacite, K2[(UO2)3O2(OH)3]2(H2O)7: Canadian Mineralogist: 36: 1061-1067.
Hill, F.C. and Burns, P.C. (1999) Structure of a synthetic Cs uranyl oxide hydrate and its relationship to compreignacite. Canadian Mineralogist: 37: 1283-1288.
Burns, P.C. (2005) U6+ minerals and inorganic compounds: insights into an expanded structural hierarchy of crystal structures. Canadian Mineralogist: 43: 1839-1894.

Internet Links for CompreignaciteHide

Localities for CompreignaciteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Australia
 
  • Northern Territory
    • Coomalie Shire
      • Batchelor
        • Rum Jungle
Geosciences, Museums Victoria
  • Tasmania
    • Northern Midlands municipality
      • Rossarden district
Bottrill (unpub)
Czech Republic
 
  • Central Bohemia Region
Pauliš P., Kopecký S., Černý P. 2007: Uranové minerály České Republiky a jejich naleziště. 1. část. (Kutna Hora, issue 1)
      • Březové Hory ore region (Birkenberg)
        • Březové Hory deposit
Plasil (2005)
  • Karlovy Vary Region
Pauliš P., Kopecký S., Černý P. 2007: Uranové minerály České Republiky a jejich naleziště. 1. část. (Kutna Hora, issue 1)
Plašil J, Sejkora J, Ondruš P, Veselovský F, Beran P, Goliáš V (2006): Supergene minerals in the Horní Slavkov uranium ore district, Czech Republic. Journal of the Czech Geological Society 51, 149-158. ; Sejkora, J. & Plasil, J. (2009): Mineralien aus dem Uranrevier Horni Slavkov. Lapis 34 (7-8), 63-67; 70 (in German).
    • Krušné Hory Mts (Erzgebirge)
      • Jáchymov District (St Joachimsthal)
Lapis 2002(7/8), 63-65
          • Rovnost Mine (Werner Mine)
Jakub Plášil, Jiří Sejkora, Radek Škoda, Pavel Škácha (2014): The recent weathering of uraninite from the Červená vein, Jáchymov (Czech Republic): a fingerprint of the primary mineralization geochemistry onto the alteration association. Journal of Geosciences, 59, 223-253.
          • Svornost Mine (Einigkeit Mine)
Jiří Sejkora, Jakub Plášil & Bohuslav Bureš (2013): Neobvyklá asociaci supergenních minerálů uranu ze žíly Jan Evangelista, Jáchymov (Česká republika). [Unusual association of supergene uranium minerals from the Jan Evangelista vein, Jáchymov (Czech Republic)]. Bull. mineral.-petrolog. Odd. Nár. Muz. (Praha) 21, 143-156
  • Vysočina Region
    • Žďár nad Sázavou District
      • Nové Město na Moravě
Pauliš P., Kopecký S., Černý P. 2007: Uranové minerály České Republiky a jejich naleziště. 1. část. (Kutna Hora, issue 1)
France (TL)
 
  • Nouvelle-Aquitaine
    • Haute-Vienne
      • Compreignac
Bull.Soc.fr.Min.Crist.(1964) 87, 365-371
Germany
 
  • Baden-Württemberg
    • Black Forest
      • St Blasien
        • Menzenschwand
Lapis 21(12), 45 (1996)
  • Thuringia
    • Gera
      • Ronneburg U deposit
Former Fritz Rüger collection
T. Witzke & F. Rüger: Lapis 1998(7/8), 26-64
Italy
 
  • Lombardy
    • Sondrio Province
      • Valchiavenna
        • Novate Mezzola
          • Codera Valley
Ghizzoni, S. & Mazzoleni, G. (2005): Itinerari mineralogici in val Codera. Geologia Insubrica, Ed., Milano, 316 pp.
Ghizzoni, S. & Mazzoleni, G. (2005): Itinerari mineralogici in val Codera. Geologia Insubrica, Ed., Milano, 316 pp.
  • Sardinia
    • Cagliari metropolitan city (Metropolitan City of Cagliari)
      • Capoterra
Olmi F., Sabelli C., Senesi F., Stara P., 2002. La mineralizzazione uranifera di Arcu su Linnarbu. Riv. Miner. Ital., 3: 148-169.
Spain
 
  • Catalonia
    • Lleida (Lérida)
      • El Pallars Jussà
        • La Vall Fosca
          • La Torre de Cabdella (La Torre de Capdella)
            • Castell-estaó
MTI Mineralogía Topográfica Ibérica, 2009
Switzerland
 
  • Wallis (Valais)
    • Le Trient Valley
      • Finhaut
        • Emosson
Meisser, N. (2012): La minéralogie de l'uranium dans le massif des Aiguilles Rouges. Matér. Géol. Suisse, Sér. géotech. 96, 183 p.
        • Giétroz
Meisser, N. (2012): La minéralogie de l'uranium dans le massif des Aiguilles Rouges. Matér. Géol. Suisse, Sér. géotech. 96, 183 p.
      • Les Marécottes
Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): Mineralienlexikon der Schweiz. Wepf (Basel), p. 120. N. Meisser, XRD, February 2009.
UK
 
  • England
    • Cornwall
      • St Just
        • Botallack
Golley, P. & Williams, R. (1995): Cornish Mineral Reference Manual. Endsleigh Publications (Truro), 104 pp.
Golley, P. & Williams, R. (1995): Cornish Mineral Reference Manual. Endsleigh Publications (Truro), 104 pp.
        • Pendeen
P Haas
USA
 
  • Colorado
    • Larimer Co.
      • Crystal Mountain Pegmatite District (Storm Mountain District)
Gunnar Färber
    • Saguache Co.
Minerals of Colorado (1997) Eckel, E. B.
  • New Hampshire
    • Grafton Co.
      • Groton
Nashua Min. Soc. Disp. Cat., 1995
  • Utah
    • Emery Co.
      • San Rafael District (San Rafael Swell)
        • Delta
Min News 14:7 p1
    • San Juan Co.
      • White Canyon District
        • White Canyon
Min News 16:1 p1
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