Giovanni B. Andreozzi
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View article: Fibrous tourmaline from San Piero in Campo (Elba, Italy)
Fibrous tourmaline from San Piero in Campo (Elba, Italy) Open
An unusual variety of fibrous tourmaline, not previously described on the island of Elba, was studied using a multi-analytical approach, including powder X-ray diffraction, scanning electron microscopy, electron probe micro-analysis, Raman…
View article: Insights from the compositional evolution of a multi-coloured, zoned tourmaline from the Cruzeiro pegmatite, Minas Gerais, Brazil
Insights from the compositional evolution of a multi-coloured, zoned tourmaline from the Cruzeiro pegmatite, Minas Gerais, Brazil Open
This study compares the compositional evolution of a multi-coloured, zoned tourmaline crystal from the Cruzeiro pegmatite, Brazil, with the compositions of homogeneous tourmaline crystals systematically collected from the outer to the inne…
View article: TUR2021 3rd International Conference on Tourmaline Elba Island, Italy September 9-11, 2021
TUR2021 3rd International Conference on Tourmaline Elba Island, Italy September 9-11, 2021 Open
This volume contains 52 abstracts and keynote abstracts presented at the 3a International Conference on Tourmaline (TUR2021), held on Elba Island, Italy, from 9 to 11 September 2021 (https://www.tur2021.com). The Conference has been organi…
View article: Crystal chemistry of K-tourmalines from the Kumdy-Kol microdiamond deposit, Kokchetav Massif, Kazakhstan
Crystal chemistry of K-tourmalines from the Kumdy-Kol microdiamond deposit, Kokchetav Massif, Kazakhstan Open
Selected crystals of natural K-bearing tourmalines, extracted from a quartzofeldspathic rock from the Kumdy-Kol microdiamond deposit (an ultrahigh-pressure region of Kokchetav Massif, northern Kazakhstan), were characterized using a scanni…
View article: Genetic model for the color anomalies at the termination of pegmatitic gem tourmaline crystals from the island of Elba, Italy
Genetic model for the color anomalies at the termination of pegmatitic gem tourmaline crystals from the island of Elba, Italy Open
Tourmaline crystals from the island of Elba commonly display a sharp transition to dark colors at the analogous termination due to the incorporation of Fe and/or Mn during the latest stages of crystallization in pegmatites. The formation o…
View article: Spectroscopic Characterization of Impactites and a Machine Learning Approach to Determine the Oxidation State of Iron in Glass‐Bearing Materials
Spectroscopic Characterization of Impactites and a Machine Learning Approach to Determine the Oxidation State of Iron in Glass‐Bearing Materials Open
We investigated a suite of impact glass‐bearing rocks using a multi‐analytical approach including visible‐near‐infrared diffuse reflectance spectroscopy, Mössbauer spectroscopy, and powder X‐ray diffraction. In order to better understand a…
View article: Analytical Investigation of Iron-Based Stains on Carbonate Stones: Rust Formation, Diffusion Mechanisms, and Speciation
Analytical Investigation of Iron-Based Stains on Carbonate Stones: Rust Formation, Diffusion Mechanisms, and Speciation Open
In cultural heritage, unaesthetic stains on carbonate stones due to their close contacts with metals are of concern for the preservation of sculptures, monumental facades and archeological finds of various origin and antiquities. Rust stai…
View article: Celleriite, ☐(Mn22+Al)Al6(Si6O18)(BO3)3(OH)3(OH), a new mineral species of the tourmaline supergroup
Celleriite, ☐(Mn22+Al)Al6(Si6O18)(BO3)3(OH)3(OH), a new mineral species of the tourmaline supergroup Open
Celleriite, ☐(Mn22+Al)Al6(Si6O18)(BO3)3(OH)3(OH), is a new mineral of the tourmaline supergroup. It was discovered in the Rosina pegmatite, San Piero in Campo, Elba Island, Italy (holotype specimen), and in the Pikárec pegmatite, western M…
View article: Reexploring the cation ordering and magnetic cation substitution effects on the elastic anisotropy of aluminum spinels
Reexploring the cation ordering and magnetic cation substitution effects on the elastic anisotropy of aluminum spinels Open
We study the effects of cation inversion x (Mg ↔ Al, with x representing the fraction of Mg and Al exchanged) and magnetic substitution (Mn → Mg) on the elastic properties of the MgAl2O4 spinel system using density functional theory and Br…
View article: Surface reactivity of amphibole asbestos: A comparison between two tremolite samples with different surface area
Surface reactivity of amphibole asbestos: A comparison between two tremolite samples with different surface area Open
Surface reactivity of a fibrous tremolite sample from Castelluccio Superiore (Italy) was investigated by means of free radical generation following incubation in H2O2solution buffered at pH 7.4, for several time points, ranging from 1 day …
View article: Italian Society of Mineralogy and Petrology
Italian Society of Mineralogy and Petrology Open
Università degli Studi di Perugia), I am sure that
View article: Surface reactivity of amphibole asbestos: a comparison between crocidolite and tremolite
Surface reactivity of amphibole asbestos: a comparison between crocidolite and tremolite Open
Among asbestos minerals, fibrous riebeckite (crocidolite) and tremolite share the amphibole structure but largely differ in terms of their iron content and oxidation state. In asbestos toxicology, iron-generated free radicals are largely h…
View article: Bulk spectroscopy of mineral fibres
Bulk spectroscopy of mineral fibres Open
Spectroscopic methods are utilized widely for characterizing minerals and other geomaterials in terms of electronic, vibrational and nuclear properties. The basics and applications of spectroscopic methods in mineralogy were reported compr…
View article: Cations distribution in synthetic ( <scp>MgFe2O4</scp> and <scp>FeAl2O4</scp> ) spinels by precession electron diffraction tomography
Cations distribution in synthetic ( <span>MgFe2O4</span> and <span>FeAl2O4</span> ) spinels by precession electron diffraction tomography Open
Since recently, a method using precession electron diffraction tomography (PEDT) and dynamical calculations of the diffracted intensities has been developed, allowing the structure determination and refinement at the nanoscale in a TEM [1,…
View article: The elasticity of MgAl2O4-MnAl2O4 spinels by Brillouin scattering and an empirical approach for bulk modulus prediction
The elasticity of MgAl2O4-MnAl2O4 spinels by Brillouin scattering and an empirical approach for bulk modulus prediction Open
The elastic constants Cij of a set of synthetic single crystals belonging to the join MgAl2O4–MnAl2O4 (spinel sensu stricto–galaxite) were determined by Brillouin spectroscopy at ambient conditions. The C11 component tends to remain consta…