Investigation of datolite (CaB[SiO4/(OH)]) from basalts in the Northern Apennines ophiolites (Italy): Genetic implications

Zaccarini, Federica; Morales-Ruano, Salvador; Scacchetti, Maurizio; Garuti, Giorgio; Heide, K.

doi:10.1016/j.chemer.2008.04.004

Cited by 13 publications

(8 citation statements)

References 29 publications

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“…Description: Datolite is the second described GSG mineral; Klaproth (1806) found it in Nødebro Mine, Norway. Its formation is commonly connected with volcanic or hydrothermal processes (Giles, 1903;Pemberton, 1971;Bellatreccia et al, 2006;Zaccarini et al, 2008). Datolite previously described as "bakerite" is also a microcrystalline material in various genetic environments, including diabase spilites (Baysal & Dilekoz, 1975), diopside-bearing marble (Sabina, 1978), and gehlenitespurrite-bearing skarns (Kusachi et al, 1994).…”

Section: Appendixmentioning

confidence: 99%

Nomenclature of the gadolinite supergroup

Bačík¹,

Miyawaki²,

Atencio³

et al. 2017

ejm

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The newly defined gadolinite supergroup approved by the IMA CNMNC (vote 16-A) includes mineral species that have the general chemical formula A 2 MQ 2 T 2 O 8 ' 2 and belong to silicates, phosphates and arsenates. Each site is occupied by: A À Ca, REE (Y and lanthanoids), actinoids, Pb, Mn 2þ , Bi; M À Fe, □ (vacancy), Mg, Mn, Zn, Cu, Al; Q À B, Be, Li; T À Si, P, As, B, Be, S; and ' À O, OH, F. The classification of the gadolinite supergroup is based on the occupancy of A, M, Q, T and ' sites and application of the dominant-valency and dominant-constituent rules. The gadolinite supergroup is divided into two groups defined by prevailing charge occupancy at the T site À Si 4þ in gadolinite group and P 5þ or As 5þ in herderite group. The gadolinite group is divided into the gadolinite and datolite subgroups. The A site is dominantly occupied by divalent cations in the datolite subgroup and by trivalent cations in the gadolinite subgroup. Accordingly, the Q site is dominantly occupied by B 3þ in the datolite subgroup and by Be 2þ in the gadolinite subgroup. The herderite group is divided into two subgroups. The herderite subgroup is defined by the dominant divalent cation (usually Ca 2þ ) in the A site and Be 2þ in the Q site, while the M site is vacant. The drugmanite subgroup is defined by the dominance of divalent cations (usually Pb 2þ ) in the A site, vacancy in the Q site and the occupation of the M site. Moreover, "bakerite" is discredited as mineral species because it does not meet the conditions of the dominant-constituent rule.

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Section: Appendixmentioning

confidence: 99%

Nomenclature of the gadolinite supergroup

Bačík¹,

Miyawaki²,

Atencio³

et al. 2017

ejm

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“…They are considered as potential optical materials (Verstegen et al, 1972;Wang et al, 2009;Juwhari & White, 2012;Peng et al, 2016), materials for electrical engineering (Konerskaya et al, 1988;Tummala, 1991;Podlesov et al, 1992;Jean et al, 2002;Liu et al, 2007;Chiang et al, 2008), membrane technology (Farsiyants et al, 1989;Schubert, 2003), protection from neutron radiation (Tarasevich et al, 1990;Mann & Sidhu, 2012) and as a matrix for the immobilization of nuclear wastes (Ojovan & Lee, 2005;Malczewski & Dziurowicz, 2015). In geological sciences, gadolinite group minerals are used as a geochemical marker of magmatic as well as low-temperature processes (Bellatrecia et al, 2006;Zaccarini et al, 2008;Lyalina et al, 2014;Karas' & Ratkin, 2014).…”

Section: Introductionmentioning

confidence: 99%

Crystal structure of the OH-dominant gadolinite-(Y) analogue (Y,Ca)₂(Fe,□)Be₂Si₂O₈(OH,O)₂ from Heftetjern pegmatite, Norway

Чуканов

Aksenov

Расцветаева

et al. 2017

Acta Crystallogr Sect B

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A hydroxyl-dominant analogue of gadolinite-(Y) (OH-Gad) has been discovered in the Heftetjern granitic pegmatite, southern Norway, in association with late-stage rare-earth-element containing minerals. The empirical formula, based on ten O atoms per formula unit, is (YCaCeLaNd)(Fe□)BeSiO(OH). The mineral is monoclinic, space group P2/c, a = 4.7514 (10), b = 7.5719 (16), c = 9.9414 (2) Å, β = 90.015 (4)°, V = 357.663 (3) Å and Z = 2. The density calculated using the empirical formula is 3.903 g cm. The crystal structure was refined to R = 0.0217 for 776 reflections with I > 2σ(I). OH-Gad is isostructural with gadolinite-(Y) and it is characterized by the predominance of OH over O at the anionic Ø-site. The refined crystal-chemical formula is: (YCaCe)(Fe□)BeSiO[(OH)O(OH)*] (Z = 2). The possible orientation and local environment of the hydroxyl group were suggested based on bond-valence sum calculations and geometrical analysis of the crystal structure. The infrared spectrum confirms disordering of H atoms. OH-Gad seems to be a potentially new mineral, the first simultaneously hydroxyl- and iron-dominant member of the gadolinite subgroup. It is an OH-analogue of gadolinite-(Y) and an Fe-analogue of hingganite-(Y).

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“…The borosilicate mineral datolite CaBSiO 4 (OH), which is a common secondary mineral in mafic igneous rocks (e.g. associated with zeolites and carbonates in the vesicles of seafloor basalts), can also participate in this process because of its high thermal and baric stability. In spite of comparably small abundance (i.e.…”

Section: Introductionmentioning

confidence: 99%

Raman study of datolite CaBSiO₄(OH) at simultaneously high pressure and high temperature

Goryaĭnov

Крылов

Vtyurin

et al. 2014

J Raman Spectroscopy

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Using an in situ method of Raman spectroscopy and resistance-heated diamond anvil cell, the system datolite CaBSiO 4 (OH)water has been investigated at simultaneously high pressure and temperature (up to Р~5 GPa and Т~250°С). Two polymorphic transitions have been observed: (1) pressure-induced phase transition or the feature in pressure dependence of Raman band wavenumbers at P = 2 GPа and constant T = 22°С and (2) heating-induced phase transition at T~90°С and P~5 GPа. The number of Raman bands is retained at the first transition but changed at the second transition. The first transition is mainly distinguished by the changes in the slopes of pressure dependence of Raman peaks at 2 GPa. The second transition is characterized by several strong changes: the wavenumber jumps of major bands, the merging of strong doublets at 378 and 391 cm À1 (values for ambient conditions), the splitting of the intermediate-intensity band at 292 cm À1 , and the transformation of some low-wavenumber bands at 160-190 cm À1 . No spectral and visual signs of overhydration and amorphization have been observed. No noticeable dissolution of datolite in the water medium occurred at 5 GPa and 250°С after 3 h, which corresponds to typical conditions of the 'cold' zones of slab subduction.

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Investigation of datolite (CaB[SiO4/(OH)]) from basalts in the Northern Apennines ophiolites (Italy): Genetic implications

Cited by 13 publications

References 29 publications

Nomenclature of the gadolinite supergroup

Nomenclature of the gadolinite supergroup

Crystal structure of the OH-dominant gadolinite-(Y) analogue (Y,Ca)₂(Fe,□)Be₂Si₂O₈(OH,O)₂ from Heftetjern pegmatite, Norway

Raman study of datolite CaBSiO₄(OH) at simultaneously high pressure and high temperature

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Investigation of datolite (CaB[SiO4/(OH)]) from basalts in the Northern Apennines ophiolites (Italy): Genetic implications

Cited by 13 publications

References 29 publications

Nomenclature of the gadolinite supergroup

Nomenclature of the gadolinite supergroup

Crystal structure of the OH-dominant gadolinite-(Y) analogue (Y,Ca)2(Fe,□)Be2Si2O8(OH,O)2 from Heftetjern pegmatite, Norway

Raman study of datolite CaBSiO4(OH) at simultaneously high pressure and high temperature

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Crystal structure of the OH-dominant gadolinite-(Y) analogue (Y,Ca)₂(Fe,□)Be₂Si₂O₈(OH,O)₂ from Heftetjern pegmatite, Norway

Raman study of datolite CaBSiO₄(OH) at simultaneously high pressure and high temperature