Results 61 to 70 of about 4,305 (211)
Journal of Raman Spectroscopy, Volume 56, Issue 11, Page 1144-1153, November 2025.By integrating μRaman and μXANES techniques, one can acquire insights into the oxidation state of iron in tourmalines from the dravite–schorl series, thereby enhancing the accuracy of the Mg/(Mg + Fe2+) ratio. The observed linear correlations for P2 peak position, P1/P2 relative intensities, and WOH(3) peak position in the Raman spectrum enable the ...
Lorenzo Pasetti +6 more
wiley +1 more source
The Pace di Siena and its Gems
Journal of Raman Spectroscopy, Volume 56, Issue 11, Page 1254-1278, November 2025.For the first time, the gems of the Pace di Siena, a rare en ronde bosse enamel preserved in Arezzo (Italy), have been analyzed using a transdisciplinary approach. The combination of gemmology and Raman spectroscopy has led to the identification of blue sapphires and pink spinels, contradicting previous historical classifications.
Stefania Martiniello +6 more
wiley +1 more source
Journal of Raman Spectroscopy, Volume 56, Issue 11, Page 1302-1314, November 2025.This paper presents a new protocol for the laboratory preparation of archaeological samples. Ceramics that have been hand‐crafted using different sediments as raw materials were collected in a Roman Villa sited in Fiumana (FC), Italy. This method aims at concentrating and analysing heavy minerals in the 15–250 μm grain size fraction, studying the ...
S. Andò +6 more
wiley +1 more source
The behavior of major and trace elements of the tourmaline from the Mangavai and Ganjnameh pegmatitic rocks (Hamadan area) [PDF]
پترولوژی, 2016 The Mangavai and Ganjnameh pegmatitic rocks are part of the Alvand granitoid pluton in the Sanandaj-Sirjan zone. The composition of tourmaline in Mangavi is Schorl and that of the Ganjnameh lies in the Schorl- foitite fields.
Ahmad Ahmadi khalaji +3 more
doaj
Записки Горного институтаIn the Severny pluton in Chukotka, an association of rare-metal, tin-bearing topaz-zinnwaldite greisens (zwitters) and tourmaline metasomatites has been identified through geological mapping and mineralogical-petrographic studies.
Viktor I. Alekseev +2 more
doaj
Tourmaline and Rutile as Indicators of a Magmatic-hydrothermal Origin for Tourmalinite Layers in the São José do Barreiro Area, NE Ribeira Belt, Southern Brazil [PDF]
Geologia USP. Série Científica, 2010 Tourmalines from tourmaline-rich layers intercalated with schists of the Rio Una Unit of the Embu Complex and fromcoarse-grained tourmalinite layers associated with quartzite from São José do Barreiro and Formoso (Central Ribeira Belt,São Paulo State ...
Gianna Maria Garda +3 more
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Yankuang ceshi, 2017 Tourmaline is a boron-containing aluminosilicate mineral, which is an important non-metallic mineral resource, and an indicator for rock-forming and ore-forming processes.
CHENG Xue-hai +4 more
doaj +1 more source
Gem-Quality Tourmaline from LCT Pegmatite in Adamello Massif, Central Southern Alps, Italy: An Investigation of Its Mineralogy, Crystallography and 3D Inclusions [PDF]
, 2018 Valeria Diella +7 more
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Journal of Spectroscopy, 2018 In order to better understand the effect of transition metal cations on color of tourmaline, X-ray photoelectron spectroscopy was used to investigate the species, chemical state, site occupancy, and chemical environment of color-induced metal cations in ...
Ming Li +5 more
doaj +1 more source
Tourmaline Composition of the Kışladağ Porphyry Au Deposit, Western Turkey: Implication of Epithermal Overprint [PDF]
, 2020 Ömer Bozkaya +6 more
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