New crystal-chemical data on zincoberaunite from Krásno near Horní Slavkov (Czech Republic)

Tvrdý, Jaromír; Plášil, Jakub; Škoda, Radek

doi:10.3190/jgeosci.296

Cited by 6 publications

(3 citation statements)

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“…Mineral springs formed here by precipitation in the long geological past of powerful sinter bodies. Mineralogical composition is made up of two varieties of aragonite ("Vřídlovec" and "Hrachovec" in Czech) [3,6,9,[11][12][13]. The thickness of this body, the so-called hot spring plate, exceeds 8 m. The hot spring stone is found in the bedrock, for example, of the Hot Spring Colonnade or the Church of St. Mary Magdalene.…”

Section: Karlovy Vary Aragonite ("Vřídlovec" In Czech)mentioning

confidence: 99%

UNESCO World Heritage Site Karlovy Vary and its geotourism development opportunities linked with architecture

Duraj,

Niemiec,

Kubáč

et al. 2024

MATEC Web Conf.

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Today’s appearance of spa towns in the country is represented by the architecture of the 19th and 20th centuries. We mainly find elements of empire, neo-renaissance, and art nouveau in them. Even Karlovy Vary, even though its history goes back to the past, presents itself with this architecture. Even though the spa was here at the very beginning of the city’s foundation, nothing was left of the original buildings due to natural disasters. If they were not natural disasters, they were also remediation that freed up space for the construction of new buildings. Apart from hotel buildings, typical objects of spa architecture are mainly spa buildings and pavilions, construction modifications of springs or colonnades. An essential part of these centres is also greenery and water supplements that balance the mass of these buildings. However, the favourable geological, especially hydrogeological and geomorphological conditions of these locations play the most important role for the development of the spa industry. From the point of view of tourism in Karlovy Vary, the aim of this work is to connect the classic spa tourism of this city, which was already supplemented by film tourism in the middle of the 20th century with geotourism.

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Section: Karlovy Vary Aragonite ("Vřídlovec" In Czech)mentioning

confidence: 99%

UNESCO World Heritage Site Karlovy Vary and its geotourism development opportunities linked with architecture

Duraj,

Niemiec,

Kubáč

et al. 2024

MATEC Web Conf.

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“…Charakteristickou minoritní složkou greisenových těles a přidružených křemenných žil krásenského ložiska jsou fosfátové akumulace o velikosti od několika milimetrů až po 30 cm (Sejkora et al 2006d). Jejich pozdně hydrotermálními až supergenními alteracemi vznikly obzvláště pestré minerální asociace, ze kterých pocházejí jak výše uvedené nově popsané fosforečnany, tak i v České republice poprvé zjištěné arzeničnany philipsburgit (Vrtiška et al 2016), arthurit (Vrtiška et al 2018), bendadait (Sejkora et al 2019b), jakož i fosforečnany zinkoberaunit (Tvrdý et al 2020) a zde charakterizovaný kleemanit.…”

Section: Charakteristika Lokalityunclassified

Kleemanit, vzácný fosforečnan z Krásna u Horního Slavkova, Česká republika

Vrtiška,

Tvrdý,

Malíková

et al. 2023

Bull Mineral Petrolog

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A very rare secondary Zn-Al phosphate, kleemanite, was found in association with Al-rich chalcosiderite and krásnoite on samples from the Huber stock in the Krásno deposit near Horní Slavkov (Karlovy Vary Region, Czech Republic). Kleemanite forms small white needle-like to fibrous crystals clustering into urchin-like aggregates up to 2 mm in size. Individual crystals reach a length of up to 0.5 mm. The mineral grows on the walls of the corrosion cavity of the fluorapatite aggregate in quartz gangue. Its chemical composition corresponds to the empirical formula Zn1.02(Al2.04 Fe0.09)Σ2.13(PO4)2.00[(OH)2.41(F)0.04]Σ2.45·3H2O. Kleemanite is monoclinic, unit-cell parameters refined from X-ray powder diffraction data are a 7.286(8), b 7.194(5), c 9.774(8) Å, β 110.2(6)° and V 480.9(7) Å3. The Raman spectrum of kleemanite has not been published before and is included in this paper.

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“…The refinement was performed using the full-matrix least-squares algorithm of the Jana2020 program (Petříček et al, 2020). It revealed the same general model as provided for the beraunite-related structures (Fanfani and Zanazzi, 1967;Moore and Kampf, 1992;Chukanov et al, 2017;Aksenov et al, 2018;Tvrdý et al, 2020). The refinement converged smoothly, including H-atom sites located by Fourier syntheses (H atoms refined using soft constrains on the O-H distances and U iso of the H atoms were set at 1.2 times that of the corresponding donor O atom), to the final R = 0.0203 for 2301 unique reflections of I > 3σ(I ) with a goodness of fit = 1.35; the highest peak that resides in the electron density was 0.37 e -Å -3 , only.…”

Section: X-ray Diffraction Data and Crystal Structurementioning

confidence: 99%

Ferroberaunite, Fe²⁺Fe³⁺₅(PO₄)₄(OH)₅⋅6H₂O, a mixed-valence iron member of the beraunite series, from the Gravel Hill mine, Perranzabuloe, Cornwall, England

Tvrdý

Plášil

Vrtiška

et al. 2022

MinMag

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The new mineral ferroberaunite, Fe 2+ Fe 3+ 5 (PO 4 ) 4 (OH) 5 •6H 2 O (IMA 2021-36; symbol: Fbru), occurs in cavities of limonite iron ore from the Gravel Hill mine, Perranzabuloe, Cornwall, England, United Kingdom. Its flattened prismatic crystals up to 400 μm long are dark green to olive green, transparent to translucent, with a vitreous lustre, pearly on cleavages. The Mohs' hardness is about 3-4. The density measured by the flotation method is 2.94(2) g•cm -3 , the calculated density is 2.907 g•cm -3 . Ferroberaunite is biaxial (-), with α = 1.736( 2), β = 1.765(3), γ = 1.786(5) at 589 nm, 2V meas. = 68(3)°, 2V calc. = 79°; dispersion of optical axes is strong, r > v; orientation is Y = b; X ≈ a, Z ≈ c. Pleochroism is strong: X = bluish-green >> Z = green > Y = yellow. Electron-microprobe analyses gave the empirical formula (Fe 2+ 0.75 Ca 0.01 Mn 0.02 Fe 3+ 0.22 ) Σ1.00 (Fe 3+ 4.88 Al 0.04 ) Σ4.92 (PO 4 ) 4 O 0.11 (OH) 4.76 •6H 2 O. Ferroberaunite is monoclinic, C2/c, with a = 20.8708(3), b = 5.1590(8), c = 19.2263(3) Å, β = 93.3186(17)°, V = 2066.7(3) Å 3 and Z = 4. The eight strongest lines in the X-ray powder diffraction pattern are [d meas /Å (I rel. %) (hkl)]: 10.410 (100) (200), 9.606 (14) (002), 7.271 (11) (20-2), 5.203 (4) (400), 3.467 (12) (600), 3.325 (6) (60-2), 3.201 (6) (006), 2.600 (4) (800). The mineral is isostructural with beraunite, recently redefined as Fe 3+ 6 (PO 4 ) 4 O(OH) 4 •6H 2 O. 2

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New crystal-chemical data on zincoberaunite from Krásno near Horní Slavkov (Czech Republic)

Cited by 6 publications

References 0 publications

UNESCO World Heritage Site Karlovy Vary and its geotourism development opportunities linked with architecture

UNESCO World Heritage Site Karlovy Vary and its geotourism development opportunities linked with architecture

Kleemanit, vzácný fosforečnan z Krásna u Horního Slavkova, Česká republika

Ferroberaunite, Fe²⁺Fe³⁺₅(PO₄)₄(OH)₅⋅6H₂O, a mixed-valence iron member of the beraunite series, from the Gravel Hill mine, Perranzabuloe, Cornwall, England

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New crystal-chemical data on zincoberaunite from Krásno near Horní Slavkov (Czech Republic)

Cited by 6 publications

References 0 publications

UNESCO World Heritage Site Karlovy Vary and its geotourism development opportunities linked with architecture

UNESCO World Heritage Site Karlovy Vary and its geotourism development opportunities linked with architecture

Kleemanit, vzácný fosforečnan z Krásna u Horního Slavkova, Česká republika

Ferroberaunite, Fe2+Fe3+5(PO4)4(OH)5⋅6H2O, a mixed-valence iron member of the beraunite series, from the Gravel Hill mine, Perranzabuloe, Cornwall, England

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Product

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Ferroberaunite, Fe²⁺Fe³⁺₅(PO₄)₄(OH)₅⋅6H₂O, a mixed-valence iron member of the beraunite series, from the Gravel Hill mine, Perranzabuloe, Cornwall, England