The F-analogue of schorl from Grasstein, Trentino South Tyrol, Italy: crystal structure and chemistry

Ertl, Andreas; Kolitsch, Uwe; Prowatke, Stefan; Dyar, M. D.; Henry, Darrell J.

doi:10.1127/0935-1221/2006/0018-0583

Cited by 19 publications

(2 citation statements)

References 21 publications

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“…The presence of a large number of substitutional atoms and vacancies involves additional complexity in the tourmaline structure [39,40] resulting in a great number of endmember minerals, such as schorl [NaFe3Al6(BO3)3Si6O18(OH)4], dravite [NaMg3Al6(BO3)3Si6O18(OH)4], elbaite [Na(Li,Al)3Al6(BO3)3Si6O18(OH)4] (whose red variety is known as rubellite), buergerite [NaFe 3+ 3Al6(BO3)3Si6O18(O,F)4], uvite [(Ca,Na) (Mg,Fe)3Al5Mg(BO3)3Si6O18(OH,F)4], hydroxyuvite, liddicoatite, olenite, chromdravite, vanadiumdravite, foitite, magnesiofoitite, feruvite, povondraite and rossmanite (the ideal chemical formulae of the most common ones are given). In the meantime, numerous papers related to the crystal structure study of various types of tourmaline have been published in the literature [41][42][43][44][45][46][47].…”

Section: Cyclosilicates (Ring Silicates)mentioning

confidence: 99%

Minerals from Macedonia. XXX. Complementary use of vibrational spectroscopy and X-ray powder diffraction for spectra-structural study of some cyclo-, phyllo- and tectosilicate minerals. A review

Jovanovski

Makreski

2016

Maced. J. Chem. Chem. Eng.

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A review of the results of the complementary use of vibrational spectroscopy (infrared and Raman) and X-ray powder diffraction in the process of identification and spectra-structure correlation of some cyclo-, phyllo-and tectosilicate minerals originating from the Republic of Macedonia is presented. The following minerals are studied: schorl, Na(Fe 2+ ,Mg)3Al6(BO3)3Si6O18(OH)4; beryl, (Be,Mg)3Al2Si6O18; chrysotile, Mg3Si2O5(OH)4; antigorite, (Mg,Fe 2+ )3Si2O5(OH)4; talc, (Mg,Fe 2+ )3Si4O10(OH)2; clinochlore, (Mg,Fe 2+ )5Si3(Al,Cr)2O10(OH)8; cymrite, BaAl2Si2O8H2O; montmorillonite, (K,Ca)0.3(Al,Mg)2Si4O10(OH)2nH2O; muscovite, KAl2(Si3Al)O10(OH,F)2; phlogopite, KMg3(Si3Al)O10(OH,F)2; biotite, K(Mg,Fe 2+ )3AlSi3O10(OH,F)2; sheridanite, (Mg,Al)6(Si,Al)4O10(OH)8; albite, NaAlSi3O8; microcline, KAlSi3O8; sanidine, (K,Na)(Si,Al)4O8 and stilbite, Na3Ca3Al8Si28O7230H2O. Keywords: vibrational spectroscopy; infrared; Raman; X-ray powder diffraction; identification; cyclosilicate; phyllosilicate; tectosilicate; minerals МИНЕРАЛИ ОД МАКЕДОНИЈА. XXX. КОМПЛЕМЕНТАРНО КОРИСТЕЊЕ НА ВИБРАЦИОНАТА СПЕКТРОСКОПИЈА И НА РЕНДГЕНСКАТА ДИФРАКЦИЈА ОД ПРАШОК ПРИ СПЕКТАР-СТРУКТУРНИ ИСТРАЖУВАЊА НА НЕКОИ ЦИКЛО-, ФИЛО-И ТЕКТОСИЛИКАТНИ МИНЕРАЛИ. ПРЕГЛЕДНА СТУДИЈА Даден е преглед на резултатите од комплементарното користење на вибрационата спектроскопија (инфрацрвена и раманска) и на рендгенската дифракција од прашок при идентификација и спектар-структурни корелации на некои цикло-, фило-и тектосиликатни минерали по потекло од Република Македонија. Изучувани се следните минерали: шерл, Na(Fe 2+ ,Mg)3Al6(BO3)3Si6O18(OH)4; берил, (Be,Mg)3Al2Si6O18; хризотил, Mg3Si2O5(OH)4; антигорит, (Mg,Fe 2+ )3Si2O5(OH)4; талк, (Mg,Fe 2+ )3Si4O10(OH)2; клинохлор, (Mg,Fe 2+ )5Si3(Al,Cr)2O10(OH)8; цимрит, BaAl2Si2O8H2O; монтморилонит, (K,Ca)0.3(Al,Mg)2Si4O10(OH)2nH2O; мусковит, KAl2(Si3Al)O10(OH,F)2; флогопит, KMg3(Si3Al)O10(OH,F)2; биотит, K(Mg,Fe 2+ )3AlSi3O10(OH,F)2; шериданит, (Mg,Al)6(Si,Al)4O10(OH)8; албит, NaAlSi3O8; микроклин, KAlSi3O8; санидин, (K,Na)(Si,Al)4O8 и стилбит, Na3Ca3Al8Si28O7230H2O. Клучни зборови: вибрациона спектроскопија; инфрацрвена; раманска; рендгенска дифракција од прашок; идентификација; циклосиликати; филосиликати; тектосиликати; минерали G. Jovanovski, P. Makreski Maced. J. Chem. Chem. Eng. 35 (2), 125-155 (2016)

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Section: Cyclosilicates (Ring Silicates)mentioning

confidence: 99%

Minerals from Macedonia. XXX. Complementary use of vibrational spectroscopy and X-ray powder diffraction for spectra-structural study of some cyclo-, phyllo- and tectosilicate minerals. A review

Jovanovski

Makreski

2016

Maced. J. Chem. Chem. Eng.

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“…Bond valences attached to the graph edges were derived from [46,47] for V-and W-site bonds and [48,49] for Z-and Y-site bonds. X-site valences were calculated from the structure of fluor-schorl [50] and olenite [51] which have the highest Na content at the X site from the whole dataset of [49]. The calculation revealed that the X-O2 bond valence is 0.14 vu (valence units) in both samples, while X-O4 and X-O5 bonds have valences between 0.07 and 0.09 vu.…”

Section: Pb 2+ and Bi 3+ At The X Sitementioning

confidence: 99%

Considerations About Bi and Pb in the Crystal Structure of Cu-Bearing Tourmaline

Ertl

Bačík

2020

Minerals

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Copper- and Mn-bearing elbaitic tourmaline (“Paraíba tourmaline”) sometimes contains significant amounts of Pb and Bi. Their position in the tourmaline crystal structure was studied with correlation analysis and bond valence calculations. Correlations between the F content and the X-site charge allow predicting the X-site occupancy. Three sets of tourmaline analyses were studied: (1) Pb-rich tourmalines from the Minh Tien pegmatite, Vietnam; (2) Cu-, Pb- and Bi-bearing tourmalines from the Mulungu mine, Brazil; (3) Cu- and Bi-bearing tourmalines from the Alto dos Quintos mine, Brazil. Two correlations were plotted: (1) the charge by considering only Na1+, Ca2+ and K1+; (2) the charge by adding Pb2+ and Bi3+ to the X-site charge. When plotting correlations for the Minh Tien tourmalines, the correlation significantly improves by adding Pb2+ to the X site. For the Alto dos Quintos tourmalines, only a slight increase of the correlation coefficient is observed, while such a correlation for tourmalines from Mulungu interestingly shows a slight decrease of the correlation coefficient. Bond valence calculations revealed that Bi3+ and Pb2+ can indeed occupy the X site via BiLi(NaAl)−1, PbLi(NaCu)−1 and possibly PbCu(NaAl)−1 substitutions as seen in the investigated tourmaline samples. At the Y site, Pb4+ can be substituted via PbLi(AlCu)−1, and PbVO(AlVOH)−1, while Bi5+ does not have any stable arrangement in Cu-bearing fluor-elbaite. The occurrence of Pb4+ at the Y site could be one explanation for the results of the correlations of the Mulungu tourmalines. Another explanation could be that during the tourmaline crystallization some additional Bi and Pb came into the pegmatitic system and hence disturbed the correlation between the average X-site charge and the F content. Further plots of such correlations in “Paraíba tourmaline” samples might also help to distinguish between the worldwide localities of these rare and sought-after tourmalines.

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Tourmalines from the siderite-quartz-sulphide hydrothermal veins, Gemeric unit, western Carpathians, Slovakia: crystal chemistry and evolution

et al. 2017

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The F-analogue of schorl from Grasstein, Trentino South Tyrol, Italy: crystal structure and chemistry

Cited by 19 publications

References 21 publications

Minerals from Macedonia. XXX. Complementary use of vibrational spectroscopy and X-ray powder diffraction for spectra-structural study of some cyclo-, phyllo- and tectosilicate minerals. A review

Minerals from Macedonia. XXX. Complementary use of vibrational spectroscopy and X-ray powder diffraction for spectra-structural study of some cyclo-, phyllo- and tectosilicate minerals. A review

Considerations About Bi and Pb in the Crystal Structure of Cu-Bearing Tourmaline

Tourmalines from the siderite-quartz-sulphide hydrothermal veins, Gemeric unit, western Carpathians, Slovakia: crystal chemistry and evolution

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