Special Collection: Advances in Ultrahigh-Pressure Metamorphism: Tetrahedral boron in natural and synthetic HP/UHP tourmaline: Evidence from Raman spectroscopy, EMPA, and single-crystal XRD

Kutzschbach, Martin; Wunder, Bernd; Rhede, Dieter; Koch‐Müller, Monika; Ertl, Andreas; Giester, Gerald; Heinrich, Wilhelm; Franz, Gerhard

doi:10.2138/am-2016-5341

Cited by 30 publications

(27 citation statements)

References 44 publications

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“…In contrast to the study of Kutzschbach et al, there are no detectable amounts of [4] B in the examined tourmaline. The Raman spectroscopic study of natural maruyamaite from the Kokchetav and synthetic K‐rich tourmaline (with up to 0.25 [4] B apfu) have not revealed any signature of [4] B incorporation in the tourmaline structure.…”

Section: Discussioncontrasting

confidence: 99%

Dumortierite and tourmaline from the Barchi‐Kol diamond‐bearing kyanite gneisses (Kokchetav massif): A Raman spectroscopic study and petrological implications

Korsakov

Rezvukhina

Rezvukhin

et al. 2019

J Raman Spectroscopy

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Two minerals of boron, dumortierite and tourmaline, have been studied in a diamondiferous kyanite gneiss (Barchi‐Kol area, Kokchetav massif, Northern Kazakhstan) by Raman spectroscopy and electron microprobe (EMP) analysis. Dumortierite and tourmaline (almost pure schorl end‐member) coexist within the sample, with blue/purple dumortierite inclusions hosted by kyanite porphyroblasts and blue tourmaline crystals occurring as inclusions in garnet. Optically, dumortierite appears almost identical to kyanite host and can be easily overlooked in thin sections during optical and scanning electron microscopic observations. Both boron minerals show a very strong anisotropy, and the most prominent Raman spectra can be obtained if the electric field vector E is parallel to the c axis of the dumortierite and tourmaline crystals. The Raman spectra of the investigated dumortierite are very similar to those of the synthetic dumortierite with a pronounced excess of boron (up to 0.26 [4]B), although the EMP examination revealed only one grain of the natural dumortierite studied here to have a very low boron surplus (up to 0.03 [4]B). Neither Raman spectroscopic study nor EMP analysis detected [4]B in tourmaline. The findings of dumortierite and tourmaline in the diamondiferous gneisses provide important implications for the presence of a boron‐rich fluid or melt during subduction/exhumation processes.

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Section: Discussioncontrasting

confidence: 99%

Dumortierite and tourmaline from the Barchi‐Kol diamond‐bearing kyanite gneisses (Kokchetav massif): A Raman spectroscopic study and petrological implications

Korsakov

Rezvukhina

Rezvukhin

et al. 2019

J Raman Spectroscopy

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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%

“…Similarly to other researchers (Gonzalez-Carreño et al 1988 Figure 2 allows noticing asymmetry of all the peaks toward lower Raman shifts. Kutzschbach et al (2016) observed such an effect for the Al-peak in synthetic olenite and interpreted it as a result of the presence of vacancies at the X site. We agree with this interpretation, because an alkali-vacant-type substitution of X + + Y 2+ = X  0+ + Y Al 3+ , with Al 3+ at the Y sites, needs a vacant X site.…”

Section: The Input Model Of Raman Spectrum In the O-h Stretching Vibrmentioning

confidence: 94%

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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“…"Routine" operating conditions (10 kV, 15 nA beam current, 30 s counting time) yielded an approximate detection limit of ∼0.2-0.3 wt% B 2 O 3 (McGee et al, 1991). However, the relative analytical error (1s) of B measurement on EMPA is still relatively high, at the level of several percent (Kutzschbach et al, 2016). Nevertheless, structure refinement of many GSG minerals revealed occupancy of the Q site by B along with Be Cámara et al, 2008).…”

Section: Boron Beryllium and Lithiummentioning

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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Special Collection: Advances in Ultrahigh-Pressure Metamorphism: Tetrahedral boron in natural and synthetic HP/UHP tourmaline: Evidence from Raman spectroscopy, EMPA, and single-crystal XRD

Cited by 30 publications

References 44 publications

Dumortierite and tourmaline from the Barchi‐Kol diamond‐bearing kyanite gneisses (Kokchetav massif): A Raman spectroscopic study and petrological implications

Dumortierite and tourmaline from the Barchi‐Kol diamond‐bearing kyanite gneisses (Kokchetav massif): A Raman spectroscopic study and petrological implications

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

Nomenclature of the gadolinite supergroup

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