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Walpurgite

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Formula:
(BiO)4(UO2)(AsO4)2 · 3H2O
Colour:
yellow, orange-yellow; colourless to light yellow in transmitted light.
Lustre:
Adamantine, Greasy
Hardness:
Specific Gravity:
6.69 (Calculated)
Crystal System:
Triclinic
Name:
For the type locality, Walpurgis vein, Weißer Hirsch Mine, Schneeberg, Saxony, Germany.
This page provides mineralogical data about Walpurgite.


Hide all sections | Show all sections

Classification of WalpurgiteHide

Approved, 'Grandfathered' (first described prior to 1959)
8.EA.05

8 : PHOSPHATES, ARSENATES, VANADATES
E : Uranyl phosphates and arsenates
A : UO2:RO4 = 1:2
40.5.9.1

40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
5 : AXO4·xH2O
20.6.6

20 : Arsenates (also arsenates with phosphate, but without other anions)
6 : Arsenates of Bi

Physical Properties of WalpurgiteHide

Adamantine, Greasy
Transparency:
Transparent, Translucent
Colour:
yellow, orange-yellow; colourless to light yellow in transmitted light.
Hardness:
3½ on Mohs scale
Cleavage:
Perfect
On {010}, perfect.
Density:
6.69 g/cm3 (Calculated)

Optical Data of WalpurgiteHide

Type:
Biaxial (-)
RI values:
nα = 1.871 - 1.910 nβ = 1.975 - 2.000 nγ = 2.005 - 2.060
2V:
Measured: 50° to 60°, Calculated: 54° to 74°
Max Birefringence:
δ = 0.134 - 0.150
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
strong
Pleochroism:
Non-pleochroic

Chemical Properties of WalpurgiteHide

Formula:
(BiO)4(UO2)(AsO4)2 · 3H2O
IMA Formula:
Bi4O4(UO2)(AsO4)2 · 2H2O

Crystallography of WalpurgiteHide

Crystal System:
Triclinic
Cell Parameters:
a = 7.13 Å, b = 10.44 Å, c = 5.49 Å
α = 101.6°, β = 110.82°, γ = 88.28°
Ratio:
a:b:c = 0.683 : 1 : 0.526
Unit Cell V:
373.79 ų (Calculated from Unit Cell)
Morphology:
Crystals lath-like [001] and tabular {010} with an oblique termination. Occurs also as sub-parallel aggregates and radial groups.
Twinning:
Twin plane and composition surface {010}, common, the twinned aggregates pseudo-monoclinic (resembling gypsum).

X-Ray Powder DiffractionHide

Image Loading

Radiation - Copper Kα
Data Set:
Data courtesy of RRUFF project at University of Arizona, used with permission.

Type Occurrence of WalpurgiteHide

Synonyms of WalpurgiteHide

Other Language Names for WalpurgiteHide

German:Walpurgin
Simplified Chinese:砷铋铀矿
Spanish:Walpurgita
Traditional Chinese:砷鈾鉍礦

Relationship of Walpurgite to other SpeciesHide

Other Members of this group:
Orthowalpurgite(BiO)4(UO2)(AsO4)2 · 2H2OOrth.
Phosphowalpurgite(BiO)4(UO2)(PO4)2 · 2H2OTric. 1 : P1

Common AssociatesHide

Associated Minerals Based on Photo Data:
Mixite9 photos of Walpurgite associated with Mixite on mindat.org.
Atelestite4 photos of Walpurgite associated with Atelestite on mindat.org.
Bismite2 photos of Walpurgite associated with Bismite on mindat.org.
Bariopharmacosiderite2 photos of Walpurgite associated with Bariopharmacosiderite on mindat.org.
Calcite1 photo of Walpurgite associated with Calcite on mindat.org.
Uranospinite1 photo of Walpurgite associated with Uranospinite on mindat.org.
Metatorbernite1 photo of Walpurgite associated with Metatorbernite on mindat.org.
Eulytine1 photo of Walpurgite associated with Eulytine on mindat.org.
Bismutite1 photo of Walpurgite associated with Bismutite on mindat.org.
Nováčekite-I1 photo of Walpurgite associated with Nováčekite-I on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

8.EA.05Orthowalpurgite(BiO)4(UO2)(AsO4)2 · 2H2OOrth.
8.EA.05Phosphowalpurgite(BiO)4(UO2)(PO4)2 · 2H2OTric. 1 : P1
8.EA.10HallimonditePb2(UO2)(AsO4)2 · nH2O, 0 ≤ n ≤ 0.5Tric. 1 : P1
8.EA.10ParsonsitePb2(UO2)(PO4)2Tric. 1 : P1
8.EA.15UlrichiteCaCu(UO2)(PO4)2 · 4H2OMon.
8.EA.20LakebogaiteCaNaFe3+2H(UO2)2(PO4)4(OH)2 · 8H2OMon. m : Bb

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

40.5.9.2Orthowalpurgite(BiO)4(UO2)(AsO4)2 · 2H2OOrth.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

20.6.1RooseveltiteBi(AsO4)Mon. 2/m
20.6.2PreisingeriteBi3(AsO4)2O(OH)Tric. 1 : P1
20.6.3Arsenobismite
20.6.4AtelestiteBi2(AsO4)O(OH)Mon. 2/m
20.6.5MixiteBiCu6(AsO4)3(OH)6 · 3H2OHex. 6/m : P63/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 WalpurgiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Weisbach, A. (1871): Vorläufige Mittheilung [Über Trögerit und Walpurgin].- Neues Jahrbuch für Mineralogie, Geologie und Paläontologie, 869-870.
Weisbach A. (1873): Neue Uranerze von Neustädtel bei Schneeberg.- Jahrbuch für das Berg- und Hüttenwesen im Königreiche Sachsen, Abhandlungen, 119-121.
Winkler (1873): Journal für praktische Chemie, Leipzig: 7: 6.
Zepharovich, V.R. von (1873): Mineralogisches Lexicon für das Kaiserthum Oesterreich. vol. 2: 341 (Cites Lindacker in Vogl (1857) relating to Waltherite).
Weisbach, A. (1877) Jahrbuch für das Berg- und Hüttenwesen im Königreiche Sachsen, Abhandlungen, 1.
Bertrand (1881) Bulletin de la Société française de Minéralogie: 4: 58 (as Waltherite).
Chester, A.H. (1896) A Dictionary of the Names of Minerals including Their History and Etymology, 320pp., New York: 285 (Waltherite).
Larsen, E.S. (1921) The Microscopic Determination of the Nonopaque Minerals, First edition, USGS Bulletin 679: 155.
Frondel, C. (1943) American Mineralogist: 28: 521 (as Waltherite).
Fischer (1946) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 106: 25.
Fischer (1948) Neues Jahrbuch für Mineralogie, Monatshefte, Abt. A: 44.
Evans (1950) American Mineralogist: 35: 1021.
Palache, C., Berman, H., & Frondel, C. (1951): The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 796-797.
Mereiter, K. (1982): The crystal structure of walpurgite, (UO2)Bi4O4(AsO4)2·2H2O. Tschermaks Mineralogische und Petrographische Mitteilungen: 30: 129-139.
American Mineralogist (1983): 68: 852.
European Journal of Mineralogy (1995): 7: 1313.
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 WalpurgiteHide

Localities for WalpurgiteHide

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.
Czech Republic
 
  • Bohemia (Böhmen; Boehmen)
    • Hradec Králové Region
      • Krkonoše Mtn (Riesengebirge)
        • Špindlerův Mlýn (Spindlermühle)
- Plášil J., Sejkora J., Plecháček J., Jebavá I., Škácha P., Škoda R., Fejfarová K.: Walpurgin z uranového ložiska Medvědín (Česká republika). Bulletin mineralogicko-petrografického oddělení Národního muzea v Praze, 2011, 19, 2, 171-181.
    • Karlovy Vary Region
      • Krušné Hory Mts (Erzgebirge)
        • Jáchymov District (St Joachimsthal)
          • Jáchymov (St Joachimsthal)
Vogl (1857) Gangverhaltn. und Mineralreich, Joachimsthal, Teplitz: 169; Palache et al (1951), Dana's System of Mineralogiy, 7th. ed., Vol. 2: 262.
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 797; Lapis (2002): (7/8), 54.
Škácha, Pavel; Horák, Vladimír; Plašil, Jakub (2014) Minerals and finds of ore shoots on the Geister vein of the western part of the Jáchymov ore district (Czech Republic). Bulletin Mineralogicko-Petrologickeho Oddeleni Narodniho Muzea v Praze Vol. 22 Issue 2, p202-202. 1p.
      • Mariánské Lázně (Marienbad)
        • Slavkovský Les Mtn
Sejkora, J., Cejka, J., Hlousek, J., Srein, V., Novotna, M. (2002): Phosphatian walpurgite from Smrkovec, the Slavonsky Les Mts. (Czech Republic): its description and physico-chemical characteristics. Neues Jahrb.Mineral, Mh., 2002, 353-367
    • Liberec Region
      • Harrachov (Harrachsdorf)
Bradna, J., Šita, F.: Nálezy minerál na Rýžovišti u Harrachova. Opera Corcontica, 1968, 5, s. 246-247.
      • Jablonec nad Nisou
Viktor Goliáš, Gereltsetseg Tumurkhuu, Pavel Kohn, Ondřej Šálek, Jakub Plášil, Radek Škoda, Jan Soumar (2016): Construction of new houses on a uranium vein outcrop: a case study from the Czech Republic. Nukleonika 61(3), 343-349.
Germany
 
  • Baden-Württemberg
    • Black Forest
      • Schenkenzell
        • Wittichen
Slotta, C. (2004): Orthowalpurgin und Walpurgin von der Grube Alt St. Josef zu Wittichen, Schwarzwald. Lapis 29 (3), 19-20.
          • Burgfelsen
No reference listed
          • Heubach Valley
No reference listed
K. Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
      • Schiltach
        • Stammelbach valley
[Lapis 1992, 11, p.13-20]
      • Triberg
        • Nußbach
No reference listed
      • Wolfach
        • Oberwolfach
          • Rankach valley
WALENTA, K. (1995): Neue Mineralfunde von der Grube Clara. 6. Folge, 2. Teil. - Lapis 20 (6), 41 und 46-49.
  • Saxony
    • Erzgebirge
      • Altenberg
Wittern: "Mineralfundorte in Deutschland", 2001
      • Breitenbrunn District
        • Antonsthal
Gröbner J., Kolitsch U.; Neufunde aus dem Erzgebirge (II), Mineralien-Welt Jg 17 (2006), 3, pag. 22-27.
      • Ehrenfriedersdorf
        • Geyer
Wittern: "Mineralfundorte in Deutschland", 2001
      • Eibenstock
        • Blauenthal
Tröger, S. (2009): Der Steinbruch Fahsel im Eibenstocker Granit, Westerzgebirge. Lapis 34 (6), 49-52.
      • Johanngeorgenstadt District
        • Johanngeorgenstadt
Gröbner, J., Grimm, O. & Zienau, H. (2005): Neufunde interessanter Wismut- und Uranmineralien am Schaarschacht, Johanngeorgenstadt, Sachsen. Lapis 30 (6), 44-51; 62.
      • Schneeberg District
        • Neustädtel
Lapis 30(7/8):41-70 (2005)
Lapis 30(7/8):41-70 (2005)
Lapis 30(7/8):41-70 (2005)
Lapis 30(7/8):41-70 (2005)
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 793.
A. Weisbach (1871): Vorläufige Mittheilung [Über Trögerit und Walpurgin].- Neues Jahrbuch für Mineralogie, Geologie und Paläontologie, 869-870; Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 797, 967, 991.
Schlegel, L., Kleeberg, R. & Meisser, N. (1996): Lapis 21(9), 37-41.
Lapis 30(7/8):41-70 (2005)
        • Wolfgang Maaßen Mine field
Lapis 30(7/8):41-70 (2005)
        • Zschorlau
Lapis 30(7/8):41-70 (2005)
    • Vogtland
      • Klingenthal
        • Muldenhammer
          • Tannenbergsthal
Stephan Wolfsried collection
      • Oelsnitz
Gröbner, J. and Kolitsch, U. (2007): The minerals of the uranium prospect at Tirpersdorf, Vogtland. Lapis 32, 37-42; 58. (in German)
Germany & Czech Republic
 
  • Erzgebirge; Krusné Hory Mts (Ore Mts)
Sejkora, J., Škoda, R., Škácha, P., Bureš, B. & Dvořák, Z. (2009): Nové mineralogické nálezy na Sn-W ložisku Cínovec v Krušných horách (Česká republika). Bulletin mineralogicko-petrologického oddělení Národního muzea v Praze 17 (2), 23-30 (in Czech with English abstract).
Namibia
 
  • Erongo Region
Bezing, L. von, Bode, R. & Jahn, S. (2008): Namibia Minerals and Localities. Edition Schloss Freudenstein, Bode Verlag GmbH, Haltern, 321 pp. (in English)
    • Karibib District
Schnaitmann, E. A., Nägele, H., Niedermayr, G., Brandstätter, F. & Jahn, S. (2007): Das Metazeunerit-Pocket auf Tubussis 22, Erongo. Mineralien-Welt 18 (2), 33-43. (in German)
Poland
 
  • Lower Silesia (Dolnośląskie)
    • Jelenia Góra District
Mochnacka, K., Banaś, M. (2000): Occurrence and genetic relationships of uranium and thorium mineralization in the Karkonosze-Izera Block (The Sudety Mts, SW Poland). Annales Societatis Geologorum Poloniae: 70: 137-150
Portugal
 
  • Viseu District
    • Viseu
Luis Martins collection
Switzerland
 
  • Wallis (Valais)
    • Le Trient Valley
      • Les Marécottes
- Meisser, N. (2012): La minéralogie de l'uranium dans le massif des Aiguilles Rouges. Matér. Géol. Suisse, Sér. géotech. 96, 183 p.
UK
 
  • Scotland
    • Dumfries & Galloway
Braithwaite, R.S.W. and Knight, J.R. (1990) Rare Minerals, Including Several New to Britain, in Supergene Alteration of U-Cu-As-Bi-Co Mineralisation Near Dalbeattie, South Scotland. Mineralogical Magazine, vol. 54, n° 374: 129-131.
Knight, J. (1978) pers. com.; Livingstone, A. and Macpherson, H.G. (1983) Fifth supplementary list of British minerals (Scottish). Mineralogical Magazine, vol. 47, n° 342, p. 99-105.; Livingstone (2002) p. 186.
      • Needle's Eye
BMS Database; R. S. W. Braithwaite and J. R. Knight (1990) Rare Minerals, Including Several New to Britain, in Supergene Alteration of U-Cu-As-Bi-Co Mineralisation Near Dalbeattie, South Scotland. Mineralogical Magazine 54:129-131.
USA
 
  • California
    • Kern Co.
      • Kern River Uranium District
        • Miracle Hot Springs (Hobo Hot Springs)
Troxel, Bennie Wyatt & P.K. Morton (1962), Mines and mineral resources of Kern County, California: California Division Mines & Geology County Report 1, 370 pp.: 333; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 330.
Mineral and/or Locality  
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