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Dipartimento di Chimica Strutturale e Stereochimica Inorganica Università di Milano
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- PublicationOpen AccessParadimorphite, IMA 2020-101 in (IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) – Newsletter 66(2022)
; ; ; ; ; ; ; ; ; ; ; The information given here is provided by the IMA Com mission on New Minerals, Nomenclature and Classification for comparative purposes and as a service to mineralogists working on new species....79 34 - PublicationRestrictedNuove specie Minerali al Monte Somma: V. l'Ekanite(2013)
; ; ; ;Russo, M.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione OV, Napoli, Italia ;Campostrini, I.; Dipartimento di Chimica - Università di Milano ;Demartin, F.; Dipartimento di Chimica - Università di Milano; ; Ekanite, Ca2ThSi8O20, was found for the first time at the Monte Somma in fragments of a sanidinic project in the early 90s at San Vito quarry (Ercolano, Naples, Italy) in three light green bipyramidal crystals (with a maximum size of about 0.3 mm) associated with sanidine, “amphibole”, anorthite and scarce “mica”. The identification was obtained with a preliminary SEM-EDS analysis and confirmed by determination of the parameters of the elementary cell (I422): a 7.462 (5), b 15.047 (11) Å.183 25 - PublicationOpen AccessNuove specie minerali al Somma-Vesuvio: fluoro-edenite(2009)
; ; ; ; ;Russo, M.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione OV, Napoli, Italia ;Della Ventura, G.; Dipartimento di Scienze Geologiche Università Roma Tre ;Campostrini, I.; Dipartimento di Chimica Strutturale e Stereochimica Inorganica Università di Milano ;Preite, D.; via Piave, 16 I-20024 Garbagnate (Milano); ; ; Despite the impossibility to make mineralogical researches on the field, the volcanic complex of Monte Somma-Vesuvius keeps surprising with new findings of mineral species for that locality. In an “old” sample belonging to Domenico Preite, picked up at Le Novelle quarry, Ercolano, Napoli, thanks to EDX and micro- FTIR analysis the fluoro-edenite was identified. This is the second Italian finding for the species after the one of the Etnean type locality of Monte Calvario, Biancavilla, Catania (Gianfagna & Oberti, 2001).260 231 - PublicationOpen AccessStoria termica di una fumarola del Vesuvio (Campania, Italy) attraverso lo studio di minerali presenti su di un microcampione(2008)
; ; ;Russo, M.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione OV, Napoli, Italia ;Campostrini, I.; 2Dipartimento di Chimica Strutturale e Stereochimica Inorganica, Università di Milano; Alava scoria sample rich in crystals, from a fumarole of the 1906 eruption, has been examined in the present work. The analyses of the sample were performed by an EDS-equipped scanning electron microscope which made possible to identify galena, sphalerite, challacolloite and gypsum; these minerals can be considered as temperature-markers. At first the fumarole was in high temperature conditions (higher than 650°C and however not lower than 400-300°C) with deposition of galena and sphalerite. When temperature decreased a film of challacolloite (KPb2Cl5) was formed and coated the existing minerals. Finally, after a sudden drop in temperature gypsum was formed. These findings are in agreement with the formation of galena and sphalerite into silica tubes placed in fumaroles of others volcanoes, according the methodology proposed by [Le Guern e Bernard, 1982].235 535 - PublicationOpen AccessNEW MINERAL SPECIES FROM VULCANO, AEOLIAN ISLANDS, SICILY, ITALY(2011-09)
; ; ; ; ;Campostrini, I.; Dipartimento di Chimica Strutturale e Stereochimica Inorganica, Università di Milano ;Demartin, F.; Dipartimento di Chimica Strutturale e Stereochimica Inorganica, Università di Milano ;Gramaccioli, C.M.; Dipartimento di Chimica Strutturale e Stereochimica Inorganica, Università di Milano ;Russo, M.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione OV, Napoli, Italia; ; ; Since 2006 Vulcano Island was the object of a joint project concerning the study of fumarole minerals of Italian volcanoes, carried out in collaboration with Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Napoli - Osservatorio Vesuviano. At present, the mineral species found at Vulcano are over 100; the island is the type locality for 23 species, 17 of which were discovered by us, and it is the unique occurrence for 20 of them. Besides the already IMA-approved “official” species, there are at least 38 potentially new minerals currently under examination. By far the main occurrence for these minerals are the fumaroles located...148 101 - PublicationRestrictedPrima segnalazione di sfalerite nelle fumarole del Vesuvio(2008)
; ; ; ; ; ;Russo, M.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione OV, Napoli, Italia ;Campostrini, I.; Dipartimento di Chimica Strutturale ;Blass, G.; Merzbachstrasse 6, ;Schafer, C.; VFMG-Vereinigung der Freunde der ;Ciriotti, M. E.; via San Pietro, 55; ; ; ; Il Somma-Vesuvio è un’area di elevato interesse mineralogico; si tratta di uno strato-vulcano, nella cui caldera (Monte Somma) si è formato il Gran Cono del Vesuvio. Questo vulcano è stato di recente oggetto di una approfondita indagine mineralogica (Russo & Punzo, 2004). Come novità ora, tra i prodotti fumarolici, è stata individuata per la prima volta la sfalerite.218 36 - PublicationOpen AccessTHE OCCURRENCE OF LAFOSSAITE AT VESUVIUS(2011-09)
; ; ; ; ;Campostrini, I.; Dipartimento di Chimica Strutturale e Stereochimica Inorganica, Università di Milano ;Demartin, F.; Dipartimento di Chimica Strutturale e Stereochimica Inorganica, Università di Milano ;Gramaccioli, C.M.; Dipartimento di Chimica Strutturale e Stereochimica Inorganica, Università di Milano ;Russo, M.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione OV, Napoli, Italia; ; ; As a part of a joint project concerning the study of fumarole minerals of the Italian volcanoes, carried out in collaboration with the Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Napoli - Osservatorio Vesuviano, a systematic investigation of old fumarole mineral samples was undertaken. The presence of natural thallium chloride lafossaite, first described at La Fossa crater...145 82 - PublicationOpen AccessSbacchiite, Ca2AlF7, a new fumarolic mineral from the Vesuvius volcano, Napoli, ItalyThe new mineral sbacchiite (IMA 2017-097), Ca2AlF7, was found in a fossil fumarole (1944 eruption, T ! 80 !C) at the rim of the crater of the Vesuvius volcano, Napoli, Italy, associated with gearsksutite, usovite, creedite and opal. It forms elongated crystals up to about 60 lm in length. On the basis of powder X-ray diffraction data and chemical analysis, the mineral was recognized to be identical to the corresponding synthetic phase. Crystals are transparent or translucent and colourless, with vitreous lustre and white streak. The tenacity is brittle. The measured density is 3.08(2) g/cm3, the calculated density is 3.116 g/cm3. The empirical formula, (based on 10 atoms per formula unit, apfu) is Ca2.02Mg0.03Al0.99F6.97. Sbacchiite is orthorhombic, space group Pnma, with a = 7.665(2), b = 6.993(1), c = 9.566(2) Å, V = 512.2(2) Å3 and Z = 4. The eight strongest X-ray powder diffraction lines are [dobs Å(I)(hkl)]: 3.840(45)(200), 3.563(85)(201), 3.499(100)(020), 2.899(55)(013), 2.750(30)(212), 2.281(20)(104), 2.255(52)(302) and 2.173(36)(131). The structure was refined to R = 0.0479 for 457 reflections with I > 2r(I). The asymmetric unit contains one Al3+ and two independent Ca2+ cations and five fluorine anions. Aluminium is octahedrally coordinated by six fluorine atoms; the arrangement of F around the 7-coordinated Ca(1) conforms to a distorted pentagonal bipyramid and that around Ca(2) to a very distorted polyhedron (in 7 + 1 coordination). All the fluorine atoms are threefold coordinated. The structure framework shows ‘‘isolated’’ [AlF6] octahedra, whereas the coordination polyhedra around Ca are linked by common edges [sequence: Ca(1)–Ca(2)– Ca(1). . .] along [010] and the same holds for the connection along [001]. Along [100], however, only the pentagonal bipyramids around Ca(1) are connected by bridging corners.
72 77 - PublicationOpen AccessNuovo ritrovamento di corindone al Monte Somma(2009)
; ; ; ;Russo, M.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione OV, Napoli, Italia ;Campostrini, I.; Dipartimento di Chimica Strutturale e Stereochimica Inorganica Università di Milano ;Castellano, F.; via Giovanni Pasc o l i, 8 I-81025 Marcianise (Caserta); ; After the occurrence described by of Balassone et al. (2001), a second finding of corundum, Al2O3, occurred in a small fragment of carbonatic rock at San Vito quarry, Ercolano, Napoli, Campania. It is the section of a 2 mm bluish crystal. The identification was done through SEM-EDX analysis at 30 kV excitation.181 222 - PublicationOpen AccessNuove specie minerali al Somma-Vesuvio: wulfenite(2009)
; ; ; ; ;Russo, M.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione OV, Napoli, Italia ;Campostrini, I.; Dipartimento di Chimica Strutturale e Stereochimica Inorganica Università di Milano ;Chiappino, L.; via Palmanova, 67 I-20132 Milano ;Punzo, I.; via Epomeo, 72 I-80126 Napoli; ; ; To the 247 species, of which 20 are doubtful, occurring at the Somma-Vesuvius volcanic complex, after the recent updating of the fluoro-edenite (despite the collecting ban) it has to be added the identification of a new common species, never occurred before. A sample belonging to Luigi Chiappino, found in 1989 at San Vito quarry, Ercolano, Napoli, was analyzed through SEM-EDX and the analysis identified the wulfenite on massive galena, as millimetrical, bipyramidal crystals, resinous, of yellow-orange colour, associated with calcite, cerussite and sphalerite.207 166
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