Brushite in the bat guano deposit from the "dry" Cioclovina Cave (Sureanu Mountains, Romania)

Dumitraş, Delia-Georgeta; Marincea, Ştefan; Fransolet, André-Mathieu

doi:10.1127/0077-7757/2004/0180-0045

Cited by 26 publications

(19 citation statements)

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“…Brushite is found in kidney stones . However, the mineral is often found in caves and is often regarded as a ‘cave’ mineral . The mineral has been identified in quite a large number of Australian caves including the Skipton lava tube caves (southwest of Ballarat, Victoria, Australia) and at Moorba Cave (Jurien Bay, Western Australia).…”

Section: Introductionmentioning

confidence: 99%

“…[3][4][5][6][7] However, the mineral is often found in caves and is often regarded as a 'cave' mineral. [8,9] The mineral has been identified in quite a large number of Australian caves including the Skipton lava tube caves (southwest of Ballarat, Victoria, Australia) and at Moorba Cave (Jurien Bay, Western Australia). As such, many minerals formed in these caves besides brushite include archerite (K,NH 4 )(H 2 PO 4 ), [10] mundrabillaite (NH 4 ) 2 Ca (HPO 4 ) 2 ÁH 2 O [11] and stercorite Na(NH 4 )HPO 4 Á4H 2 O.…”

Section: Introductionmentioning

confidence: 99%

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Raman spectroscopy of synthetic CaHPO₄·2H₂O– and in comparison with the cave mineral brushite

Frost

Pogson

et al. 2011

J Raman Spectroscopy

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The mineral brushite has been synthesised by mixing calcium ions and hydrogen phosphate anions to mimic the reactions in caves. The vibrational spectra of the synthesised brushite were compared with that of the natural cave mineral. Bands attributable to the PO43– and HPO42– anions are observed. Brushite, both synthetic and natural, is characterised by an intense sharp band at 985 cm−1 with a shoulder at 1000 cm−1. Characteristic bending modes are observed in the 300 to 600 cm−1 region. The spectra of the synthesised brushite matches very well the spectrum of brushite from the Moorba Cave, Western Australia. Copyright © 2011 John Wiley & Sons, Ltd.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Raman spectroscopy of synthetic CaHPO₄·2H₂O– and in comparison with the cave mineral brushite

Frost

Pogson

et al. 2011

J Raman Spectroscopy

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“…Over the last five years, we have thoroughly documented four minerals out of 27 known in this cave (Onac et al, , 2006Onac and White, 2003;Onac and Effenberger, 2007). Five other minerals (crandallite, tinsleyite, leucophosphite, taranakite, and brushite) were characterized in detail by Constantinescu et al (1999), Dumitraş and Marincea (2000), Dumitraş et al (2004), Marincea et al (2002), and Marincea and Dumitraş (2003). These later minerals, as well as a number of other rarities (e.g., burbankite, collinsite, sampleite) that are still in the process of single-crystal X-ray investigations are not included in this review.…”

Section: Introductionmentioning

confidence: 97%

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2007

Studia UBB, Geologia

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ABSTRACT. This paper reports on the identification of four rare minerals in the phosphate deposit in Cioclovina Cave, Romania. Berlinite, AlPO 4 and hydroxylellestadite, Ca 5 [(Si,P,S)O 4 ] 3 (OH,F,Cl) are minerals that can form only at high temperatures, and would not be expected in a sedimentary environment. In this study we review the characteristics of berlinite and hydroxylellestadite from a heated sedimentary sequence in Cioclovina Cave (Romania) and refine their structure from single-crystal X-ray data. Two other minerals, churchite-(Y), YPO 4 ⋅2H 2 O and foggite, CaAl(PO 4 )(OH) 2 ⋅H 2 O are, for the first time, described from a cave environment. The minerals were documented by means of single-crystal X-ray investigations, X-ray powder diffraction, and electron-microprobe (EMPA) analyses. In addition, laboratory synthesis of berlinite was conducted and vibrational spectroscopy data were collected for hydroxylellestadite and churchite-(Y). Based on these investigations, we suggest that locally the heavily compacted phosphate-bearing clay sediments underwent a natural heating process. It is likely that in-situ bat guano combustion is responsible for generating the high-temperature environment needed for the genesis of berlinite and hydroxylellestadite. The occurrence of churchite-(Y) and foggite is related to guano-leaches that reacted with subjacent limestone and different allogenic cave sediments.

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“…[1,2] The mineral is understood to be a precursor of apatite and is found in guano-rich caves, formed by the interaction of bat guano with calcite at a low pH. [3,4] It forms crystals of prismatic shape having a monoclinic crystal structure.…”

Section: Introductionmentioning

confidence: 99%

Vibrational Spectroscopy of Natural Cave Mineral Monetite CaHPO₄and the Synthetic Analog

Frost

Millar

et al. 2013

Spectroscopy Letters

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Monetite is a phosphate mineral formed by the reaction of the chemicals in bat guano with calcite substrates and is commonly found in caves. The analog of the mineral monetite CaHPO 4 has been synthesized and the Raman and infrared spectra of the natural monetite originating from the Murra-el-elevyn Cave, Eucla, Western Australia, compared. Monetite is characterized by a complex set of phosphate bands that arise because of two sets of pairs of phosphate units in the unit cell. Raman and infrared bands are assigned to HPO 2À 4 , OH stretching and bending vibrations. Infrared bands at 1346 and 1402 cm À1 are assigned to POH deformation modes. Vibrational spectroscopy confirms the presence of monetite in the cave system.

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Brushite in the bat guano deposit from the "dry" Cioclovina Cave (Sureanu Mountains, Romania)

Cited by 26 publications

References 0 publications

Raman spectroscopy of synthetic CaHPO₄·2H₂O– and in comparison with the cave mineral brushite

Raman spectroscopy of synthetic CaHPO₄·2H₂O– and in comparison with the cave mineral brushite

Untitled

Vibrational Spectroscopy of Natural Cave Mineral Monetite CaHPO₄and the Synthetic Analog

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Brushite in the bat guano deposit from the "dry" Cioclovina Cave (Sureanu Mountains, Romania)

Cited by 26 publications

References 0 publications

Raman spectroscopy of synthetic CaHPO4·2H2O– and in comparison with the cave mineral brushite

Raman spectroscopy of synthetic CaHPO4·2H2O– and in comparison with the cave mineral brushite

Untitled

Vibrational Spectroscopy of Natural Cave Mineral Monetite CaHPO4and the Synthetic Analog

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Raman spectroscopy of synthetic CaHPO₄·2H₂O– and in comparison with the cave mineral brushite

Raman spectroscopy of synthetic CaHPO₄·2H₂O– and in comparison with the cave mineral brushite

Vibrational Spectroscopy of Natural Cave Mineral Monetite CaHPO₄and the Synthetic Analog