...Jiří Sejkora; Jiří Čejka; Jan Hloušek; Milan Novák; Vladimír Šrein Abstract Phosphowalpurgite, ideally (UO 2 )Bi 4 O 4 (PO 4 ) 2 ·2H 2 O, is the (PO 4 )-dominant analogue of walpurgite. It occurs at old mine dumps of an abandoned small ore deposit near Smrkovec, located 10 km NNE...

...Howard T. Evans, Jr. Abstract Walpurgite, a hydrated bismuth uranium arsenate from Schneeberg, Saxony, has been studied by x -ray diffraction using the Buerger precession method. The lattice is triclimc with the following elements: a 0 =7.l3 Å, b 0 = 10.44 Å, c 0 =5.49 Å, α = 101°40′, β = 110°49′,γ...

... from the host granite of Menzenschwand, primary hydrothermal uraninite II and secondary (supergene) uranyl silicates (uranophane and cuprosklodowskite), uranyl phosphates (torbernite and uranocircite), and uranyl arsenates (zeunerite, heinrichite, nováčekite, walpurgite, and uranospinite) were analyzed...

...F igure 5. Chains of polyhedra that occur in uranyl minerals. ( a ) moctezumite, ( b ) derriksite, ( c ) demesmaekerite, ( d ) walpurgite and orthowalpurgite. ...

... : Am. Mineral . 51 1966, 1815. Percylite = mixture of boleite + pseudoboleite : Mineral. Rec . 5 1974, 284 and 29 1998, 42. Phosphate-walpurgite = walpurgite , not the same as phosphowalpurgite: Can. Mineral . 42 2004, 963–972. Picroilmenite = Mg-rich ilmenite : Clark (1993...

.... 133(3), 37–41 (in Russian, English abstract). Sejkora, J., Čejka, J., Hloušek, J., Novák, M., Šrein, V. (2004) Phosphowalpurgite, the (PO 4 )-dominant analogue of walpurgite from Smrkovec, Slavkovsky Les Mountains, Czech Republic. Can. Mineral. 42(4), 963–972. The mineral occurs as small...

..., Pb2[(UO 2 )(AsO 4 ) 2 ](H 2 O) n , with 0 ≤ n ≤ 0.5 in each case. M anuscript handled by S imona Q uartieri Chain structures are relatively uncommon in uranyl phosphate or arsenate minerals, and occur only in walpurgite, (UO 2 )Bi 4 O 4 (AsO 4 ) 2 (H 2 O) 2 ( Mereiter 1982...

.... 2000 ; Gross et al. 1958 ), metarauchite [Ni(UO 2 ) 2 (AsO 4 ) 2 ·8H 2 O] ( Plášil et al. 2010c ), metazeunerite [Cu(UO 2 ) 2 (AsO 4 ) 2 ·8H 2 O] ( Locock and Burns 2003 ), uramarsite [(NH 4 ,H 3 O) 2 (UO 2 ) 2 (AsO 4 ,PO 4 ) 2 ·6H 2 O] ( Chukanov 2013 ; Sidorenko et al. 2007 ), and walpurgite [(BiO...

... ): Hydrogen uranyl arsenate hydrate single crystals: H2(UO2)2(AsO4)2·8H 2 O; gel growth and characterization . J. Crystal Growth 61 , 606 – 614 . Mereiter , K. ( 1982 ): The crystal structure of walpurgite, (UO2)Bi4O4(AsO4)2·2H 2 O . Tschermaks Mineral. Petrogr. Mitt . 30 , 129 – 139...

...)AsO 4 and mixite, BiCu 6 (OH) 6 (AsO 4 ) 3 ·3H 2 O ( Mereiter & Preisinger, 1986 ; see also Krause et al. , 1997 ), paganoite, NiBi 3+ As 5+ O 5 ( Roberts et al. , 2001 ), walpurgite and orthowalpurgite, (UO 2 )Bi 4 O 4 (AsO 4 ) 2 ·2H 2 O ( Mereiter, 1982 ; Krause et al. , 1995...

... ) Sejkora and Ridkosil 1994 Walpurgite (UO 2 )Bi 4 O 4 (AsO 4 ) 2 · 2H 2 O Mereiter 1982 Structurally, bouazzerite is a new compound with a unique crystal structure that has no close topological relation with any known mineral or synthetic compound structure. Among Bi-arsenates...

... with various uranium and cobalt–nickel arsenates in veins of hydrothermal origin that contain oxidized uraninite, native bismuth, and cobalt–nickel arsenides ( Weisbach 1873 , Anthony et al. 1997 ). Berman (1957) found uranosphaerite associated with walpurgite, uranospinite, trögerite, zeunerite...

...., Novák, M., & Šrein, V. (2004) Phosphowalpurgite, the (PO 4 )-dominant analogue of walpurgite, from Smrkovec, Slavkovský Les Mountains, Czech Republic . Canadian Mineralogist 42 , 963 – 972...

... Phosphatian walpurgite from Smrkovec, the Slavkovsk? Les Mts. (the Czech Republic): its description and physico-chemical characteristics —J. Sejkora, J. Cejka, J. Hlousek, V. Srein, and M. Novotná 353 Archaeometallurgic slags from Kutná Hora —A. Manasse and M. Mellini 369 Sulfur speciation...