Revision of the occurrence of vanadium-rich fissure phosphates at Medkovy Kopce near Hlinsko, Czech Republic

VRTIŠKA, Luboš; Radana MALÍKOVÁ a Zbyněk DOLNÍČEK. Revision of the occurrence of vanadium-rich fissure phosphates at Medkovy Kopce near Hlinsko, Czech Republic. Acta Musei Moraviae, Scientiae Geologicae. Moravian Museum, 2024, roč. 109, č. 2, s. 145-163. ISSN 1211-8796.

Základní údaje

Originální název

Revision of the occurrence of vanadium-rich fissure phosphates at Medkovy Kopce near Hlinsko, Czech Republic

Název česky

Revize výskytu vanadem bohatých puklinových fosfátů na lokalitě Medkovy Kopce u Hlinska, Česká republika

Název anglicky

Revision of the occurrence of vanadium-rich fissure phosphates at Medkovy Kopce near Hlinsko, Czech Republic

Autoři

VRTIŠKA, Luboš; Radana MALÍKOVÁ a Zbyněk DOLNÍČEK

Vydání

Acta Musei Moraviae, Scientiae Geologicae, Moravian Museum, 2024, 1211-8796

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Další údaje

Jazyk

čeština

Typ výsledku

Článek v odborném periodiku

Obor

10504 Mineralogy

Stát vydavatele

Česká republika

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Kód RIV

RIV/00216224:14310/24:00139258

Organizační jednotka

Přírodovědecká fakulta

EID Scopus

2-s2.0-85212160023

Klíčová slova anglicky

cacoxenite; chemical composition; Czech Republic; fluorwavellite; Hlinsko; Medkovy Kopce; Oflenda; Pardubice region; Vanadium-rich phosphates; variscite; X-ray powder diffraction data

Štítky

14315010, rivok

Příznaky

Recenzováno

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Anotace

V originále

During the research of secondary fissure phosphates of the Bohemian Massif, the historically mentioned localities in the vicinity of Hlinsko were newly investigated. This paper further characterizes the occurrences of fluorwavellite, variscite, cacoxenite and crandallite in fissures of Silurian graphite-rich metasedimentary rocks at the Medkovy Kopce northwest of Hlinsko (Pardubice Region, Czech Republic). Fluorwavellite forms orange-yellow, light yellow and blue-grey radially rayed aggregates 2–4 mm in size. Its empirical formula is (Al2.97V3+0.02K0.01)Σ3.00[(PO4)1.97(VO4)0.03]Σ2.00[F0.72(OH)2.27]Σ2.99·5H2O and refined unit-cell parameters are a 9.631(3), b 17.360(5), c 6.990(2) Å and V 1168.8(6) Å3. Three varieties of variscite have been observed: yellow-green translucent spherical aggregates up to 1 mm in size with empirical formula (Al1.00Fe0.01)Σ1.01[(PO4)0.99(VO4)0.01]1.00·2H2O; thin light green finely kidney-shaped crusts with empirical formula (Al0.95Fe0.03Mg0.01)Σ0.99(PO4)1.00·2H2O and chalky white solid spherical or powdery aggregates with empirical formula (Al1.05Fe0.02Mg0.01)Σ1.08(PO4)1.00·2H2O. Unit-cell parameters of all types of variscite are given in the text. Cacoxenite forms orange crusts up to 0.2 mm thick with empirical formula (Fe3+19.76Al3.81Mg0.33Ca0.07)Σ23.97O6.00[(PO4)16.76(VO4)0.24]Σ17.00(OH)8.53·75H2O and its structure was verified by Raman spectroscopy.

Anglicky

During the research of secondary fissure phosphates of the Bohemian Massif, the historically mentioned localities in the vicinity of Hlinsko were newly investigated. This paper further characterizes the occurrences of fluorwavellite, variscite, cacoxenite and crandallite in fissures of Silurian graphite-rich metasedimentary rocks at the Medkovy Kopce northwest of Hlinsko (Pardubice Region, Czech Republic). Fluorwavellite forms orange-yellow, light yellow and blue-grey radially rayed aggregates 2–4 mm in size. Its empirical formula is (Al2.97V3+0.02K0.01)Σ3.00[(PO4)1.97(VO4)0.03]Σ2.00[F0.72(OH)2.27]Σ2.99·5H2O and refined unit-cell parameters are a 9.631(3), b 17.360(5), c 6.990(2) Å and V 1168.8(6) Å3. Three varieties of variscite have been observed: yellow-green translucent spherical aggregates up to 1 mm in size with empirical formula (Al1.00Fe0.01)Σ1.01[(PO4)0.99(VO4)0.01]1.00·2H2O; thin light green finely kidney-shaped crusts with empirical formula (Al0.95Fe0.03Mg0.01)Σ0.99(PO4)1.00·2H2O and chalky white solid spherical or powdery aggregates with empirical formula (Al1.05Fe0.02Mg0.01)Σ1.08(PO4)1.00·2H2O. Unit-cell parameters of all types of variscite are given in the text. Cacoxenite forms orange crusts up to 0.2 mm thick with empirical formula (Fe3+19.76Al3.81Mg0.33Ca0.07)Σ23.97O6.00[(PO4)16.76(VO4)0.24]Σ17.00(OH)8.53·75H2O and its structure was verified by Raman spectroscopy.