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@article{2376377,
author = {Mauro, Daniela and Biagioni, Cristian and Sejkora, Jiří and Dolníček, Zdeněk and Škoda, Radek},
article_number = {5},
doi = {http://dx.doi.org/10.5194/ejm-35-703-2023},
keywords = {APUAN ALPS (TUSCANY); CRYSTAL-CHEMISTRY; SULFATE MINERALS; BOND-VALENCE; POWDER DIFFRACTION; PARAMETERS; GLADSTONE; ALUMINITE; ALUNOGEN; IRON},
language = {eng},
issn = {0935-1221},
journal = {European Journal of Mineralogy},
title = {Batoniite, [Al8(OH)14(H2O)18](SO4)5 ⋅ 5H2O, a new mineral with the [Al8(OH)14(H2O)18]10+ polyoxocation from the Cetine di Cotorniano Mine, Tuscany, Italy},
url = {https://ejm.copernicus.org/articles/35/703/2023/},
volume = {35},
year = {2023}
}
TY - JOUR
ID - 2376377
AU - Mauro, Daniela - Biagioni, Cristian - Sejkora, Jiří - Dolníček, Zdeněk - Škoda, Radek
PY - 2023
TI - Batoniite, [Al8(OH)14(H2O)18](SO4)5 ⋅ 5H2O, a new mineral with the [Al8(OH)14(H2O)18]10+ polyoxocation from the Cetine di Cotorniano Mine, Tuscany, Italy
JF - European Journal of Mineralogy
VL - 35
IS - 5
SP - 703-714
EP - 703-714
PB - Copernicus Publications
SN - 09351221
KW - APUAN ALPS (TUSCANY)
KW - CRYSTAL-CHEMISTRY
KW - SULFATE MINERALS
KW - BOND-VALENCE
KW - POWDER DIFFRACTION
KW - PARAMETERS
KW - GLADSTONE
KW - ALUMINITE
KW - ALUNOGEN
KW - IRON
UR - https://ejm.copernicus.org/articles/35/703/2023/
N2 - The new mineral batoniite, [Al8(OH)14(H2O)18](SO4)5·5H2O, was discovered in the Cetine di Cotorniano Mine, Chiusdino, Siena, Tuscany, Italy. It occurs as hemispherical aggregates composed of brittle tabular crystals, up to 1mm in size, white to colorless in color, with a white streak and a vitreous to greasy luster. Batoniite is biaxial negative, with αCombining double low line1.4833(6), βCombining double low line1.4948(6), γ=1.5019(5) (589nm), and 2V(meas.)Combining double low line71(1). Electron microprobe analysis, affected by the dehydration of batoniite under the chamber vacuum, gave (in wt%) the following: Al2O3 33.48, Fe2O3 0.05, SO3 33.00, and H2Ocalc 44.41, total 110.94. It corresponds to the chemical formula (Al7.98Fe0.013+)ς7.99(SO4)5.01(OH)13.95(H2O)18·5H2O. Batoniite is triclinic, belonging to space group P1ĝ€3/4, with aCombining double low line9.1757(6), bCombining double low line12.0886(9), cCombining double low line20.9218(15)Å, αCombining double low line82.901(3), βCombining double low line87.334(3), 3Combining double low line86.999(2)°, VCombining double low line2297.8(3)Å3, and ZCombining double low line2. The crystal structure was refined to R1Combining double low line0.0916 for 8118 unique reflections with Fo>4σ(Fo) and 811 refined parameters and 60 restraints. Batoniite is characterized by isolated [Al8(OH)14(H2O)18]10+ polyoxocations, H-bonded to five interstitial (SO4)2- and five H2O groups. In type material, it is associated with gypsum and a poorly crystallized Al-Fe sulfate. The crystallization of batoniite is probably due to the action of H2SO4 on Al-bearing rocks of Paleozoic age cropping out in the Garibaldi Tunnel, the lowest mining level of the Cetine di Cotorniano Mine.
ER -
MAURO, Daniela, Cristian BIAGIONI, Jiří SEJKORA, Zdeněk DOLNÍČEK and Radek ŠKODA. Batoniite, [Al8(OH)14(H2O)18](SO4)5 ⋅ 5H2O, a new mineral with the [Al8(OH)14(H2O)18]10+ polyoxocation from the Cetine di Cotorniano Mine, Tuscany, Italy. \textit{European Journal of Mineralogy}. Copernicus Publications, 2023, vol.~35, No~5, p.~703-714. ISSN~0935-1221. Available from: https://dx.doi.org/10.5194/ejm-35-703-2023.
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