Thermal stability of extended clusters in dravite: a combined EMP, SREF and FTIR study

Bosi, Ferdinando; Skogby, Henrik; Balić-Žunić, Tonči

doi:10.1007/s00269-016-0804-y

Cited by 28 publications

(26 citation statements)

References 43 publications

(65 reference statements)

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“…). The refined X-site occupancy [<X-O> = 2.685(1) Å], corresponding to the presence at the site 0.821(6) Na apfu, agrees within 2 sd with the occupancy Although Raman and IR studies of tourmalines refer usually to the Si 6 O 18 rings, BO 3 groups and OH groups, all previous researchers agree that the O-H stretching vibrations in the range 3000-4000 cm -1 , carry the highest portion of crystal chemical and structural information(Gonzalez- Carreño et al 1988, Hoang et al 2011 Skogby et al 2012;Zhao et al 2012;Fantini et al 2014;Bosi et al 2015Bosi et al , 2016Berryman et al 2016;Kutzschbach et al 2016; Watenphul et al 2016a;Mercurio et al 2018;Bronzova et al 2019). This is a result of the specific location of the V OH and W OH groups in the tourmaline structure because the ligands are bonded to the octahedrallycoordinated occupants of the Y-and Z-sites, which are the two sites with the highest diversification in cation populations.…”

supporting

confidence: 76%

Crystal structure and Raman spectroscopic studies of OH stretching vibrations in Zn-rich fluor-elbaite

Pieczka

Ertl

Gołębiowska

et al. 2020

American Mineralogist

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confidence: 76%

Crystal structure and Raman spectroscopic studies of OH stretching vibrations in Zn-rich fluor-elbaite

Pieczka

Ertl

Gołębiowska

et al. 2020

American Mineralogist

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“…Gonzalez-Carreño et al , 1988; Bosi et al , 2015). Based on the studies of Skogby et al (2012), Bosi et al (2012, 2016b), Watenphul et al (2016a) and Kutzschbach et al (2016) as well as on the observed site populations, the FTIR bands of the present purplish-red tourmaline may be related to the following atomic arrangements:…”

Section: Discussionmentioning

confidence: 70%

“…These thermal conditions have previously been shown to be sufficient to impose changes in Fe redox states and intracrystalline cation distribution (e.g. Filip et al , 2012; Bosi et al , 2016a,b). The 55 and 309 μm thick samples were placed in a gold container and inserted in a preheated horizontal tube furnace equipped with a quartz-glass tube.…”

Section: Experimental Methods and Resultsmentioning

confidence: 97%

“…Gonzalez-Carreño et al, 1988;Bosi et al, 2015). Based on the studies of Skogby et al (2012), Bosi et al ( , 2016b, Watenphul et al (2016a) and Kutzschbach et al (2016) as well as on the observed site populations, the FTIR bands of the present purplish-red tourmaline may be related to the following atomic arrangements: ∼3350 cm -1 is assigned to hydrogen bond O3 O-H3⋅⋅⋅O5, which may reflect both the presence of T B 3+ and the X-site occupancy; ∼3395 cm -1 is assigned to 3[ Y (Mn 3+ ,Al) Z Al Z Al]-O3 (OH) 3 ; ∼3464, 3540 and 3597 cm -1 to 3[ Y (Li,Mn 2+ ,Al) Z Al Z Al]-O3 (OH) 3 ; ∼3650 cm -1 is assigned to Y (LiAlAl)-O1 (OH)-X (□); ∼3665 cm -1 is assigned to Y (LiMn 2+ Al)-O1 (OH)-X (□); and ∼3703 cm -1 is assigned to Y (LiAlAl)-O1 (OH)-X (Na).…”

Section: Ftir Spectra In the (Oh)-stretching Region And Band Assignmentmentioning

confidence: 99%

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Mn-bearing purplish-red tourmaline from the Anjanabonoina pegmatite, Madagascar

Bosi

Celata

Skogby

et al. 2021

MinMag

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A gem-quality purplish-red tourmaline sample of alleged liddicoatitic composition from the Anjanabonoina pegmatite, Madagascar, has been fully characterised using a multi-analytical approach to define its crystal-chemical identity. Single-crystal X-ray diffraction, chemical and spectroscopic analysis resulted in the formula: X(Na0.41□0.35Ca0.24)Σ1.00Y(Al1.81Li1.00Fe3+0.04Mn3+0.02Mn2+0.12Ti0.004)Σ3.00ZAl6 [T(Si5.60B0.40)Σ6.00O18] (BO3)3 (OH)3W[(OH)0.50F0.13O0.37]Σ1.00 which corresponds to the tourmaline species elbaite having the typical space group R3m and relatively small unit-cell dimensions, a = 15.7935(4) Å, c = 7.0860(2) Å and V = 7.0860(2) Å3. Optical absorption spectroscopy showed that the purplish-red colour is caused by minor amounts of Mn3+ (Mn2O3 = 0.20 wt.%). Thermal treatment in air up to 750°C strongly intensified the colour of the sample due to the oxidation of all Mn2+ to Mn3+ (Mn2O3 up to 1.21 wt.%). Based on infrared and Raman data, a crystal-chemical model regarding the electrostatic interaction between the X cation and W anion, and involving the Y cations as well, is proposed to explain the absence or rarity of the mineral species ‘liddicoatite’.

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“…[ 31 ]. According to [ 32 , 33 ], a very low concentration of Li in tourmaline is usually assumed to be insignificant, but tourmalines low in Li can present around 10–80 ppm of lithium content [ 31 ].…”

Section: Resultsmentioning

confidence: 99%

Quantification of lithium at ppm level in geological samples using nuclear reaction analysis

Rosa

Kristiansson

Nilsson

et al. 2018

J Radioanal Nucl Chem

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Proton-induced reaction (p,α) is one type of nuclear reaction analysis (NRA) suitable especially for light element quantification. In the case of lithium quantification presented in this work, accelerated protons with an energy about of 850 keV were used to induce the 7Li(p,α)4He reaction in standard reference and geological samples such as tourmaline and other Li-minerals. It is shown that this technique for lithium quantification allowed for measurement of concentrations down below one ppm. The possibility to relate the lithium content with the boron content in a single analysis was also demonstrated using tourmaline samples, both in absolute concentration and in lateral distribution. In addition, Particle induced X-ray emission (PIXE) was utilized as a complementary IBA technique for simultaneous mapping of elements heavier than sodium.

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Thermal stability of extended clusters in dravite: a combined EMP, SREF and FTIR study

Cited by 28 publications

References 43 publications

Crystal structure and Raman spectroscopic studies of OH stretching vibrations in Zn-rich fluor-elbaite

Crystal structure and Raman spectroscopic studies of OH stretching vibrations in Zn-rich fluor-elbaite

Mn-bearing purplish-red tourmaline from the Anjanabonoina pegmatite, Madagascar

Quantification of lithium at ppm level in geological samples using nuclear reaction analysis

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