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Micro‐Raman mapping of the polymorphs of serpentine
  • Jasmine Rita Petriglieri, E. Salvioli-Mariani, +4 authors D. Bersani
  • Materials Science
  • 1 October 2015
Serpentinites are rocks, often used in buildings, formed in large extent by minerals of the serpentine group: chrysotile, antigorite, lizardite, and polygonal serpentine. The fibrous type (e.g.Expand
Raman spectroscopy of (Ca,Mg)MgSi2O6 clinopyroxenes
Abstract The Raman spectra of eight clinopyroxenes synthesized along the join diopside-clinoenstatite (Di- Cen, CaMgSi2O6-Mg2Si2O6) were measured. The splitting of the 670 cm-1 mode of the AgExpand
The Raman spectrum of diopside: a comparison between ab initio calculated and experimentally measured frequencies
The Raman spectrum of diopside has been calculated by using three purely Density Functional Theory (DFT) Hamiltonians (PBE, WCPBE, LDA), the Hartree-Fock Hamiltonian (HF) and three hybrid HF/DFT onesExpand
The structure of (Ca,Co)CoSi2O6 pyroxenes and the Ca-M2+ substitution in (Ca,M2+)M2+Si2O6 pyroxenes (M2+ = Co, Fe, Mg)
Abstract The crystal structure of three C2/c clinopyroxenes with composition (Ca0.8Co0.2)CoSi2O6, (Ca0.6Co0.4) CoSi2O6 and (Ca0.4Co0.6)CoSi2O6 was refined down to R4σ = 2.6% by single-crystal X-rayExpand
Thermal expansion in C2/c pyroxenes: a review and new high-temperature structural data for a pyroxene of composition (Na0.53Ca0.47)(Al0.53Fe0.47)Si2O6 (Jd53Hd47)
Abstract Single-crystal X-ray data collection was performed in situ at T = 300 and 700°C on a sample synthesized along the jadeite-hedenbergite series. The structural data, together with those of aExpand
Solid solutions and phase transitions in (Ca,M2+)M2+Si2O6 pyroxenes (M2+ = Co, Fe, Mg)
Abstract The effect of the substitution of Ca with Co, on the phase transition and on the extension of the miscibility gap, was studied to model the general mechanism of phase transitions and solidExpand
Superparamagnetic iron oxides nanoparticles from municipal solid waste incinerators.
TLDR
The need to calibrate the current technologies towards a safer management of combustion ashes and certainly to inform the environmental impact assessment by using a combination of different methods is stressed. Expand
Magnetic and SEM-EDS analyses of Tilia cordata leaves and PM10 filters as a complementary source of information on polluted air: Results from the city of Parma (Northern Italy).
TLDR
The comparison between leaves and filters shows that leaves give a qualitative picture, and in this case they could be used as environmental proxies after averaging the results over multiple days; the correlation with PM10 is weaker, indicating that there is a PM10 contribution from non-magnetic particles, like calcite and clay minerals, pollen and spores. Expand
Crystallographic and spectroscopic characterization of a natural Zn-rich spinel approaching the endmember gahnite (ZnAl2O4) composition
Abstract The crystal chemistry of a natural, gem-quality, blue-grey Zn-rich spinel crystal from Jemaa, Kaduna State, Nigeria, was studied using electron microprobe, single-crystal X-ray diffraction,Expand
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