I diaspri manganesiferi metamorfosati in facies di zeoliti della miniera di Molinello presso Chiavari (Genova) contengono un minerale del gruppo della ganofillite in cui Ca ľ Na ≪ K. Esso forma lamelle verdi chiare a contorno esagonale... more
I diaspri manganesiferi metamorfosati in facies di zeoliti della miniera di Molinello presso Chiavari (Genova) contengono un minerale del gruppo della ganofillite in cui Ca ľ Na ≪ K. Esso forma lamelle verdi chiare a contorno esagonale entro vene in cui e concresciuto con quarzo, parsettensite nambulite, rame nativo e serandite (?). La sua composizione chimica si inquadra in quella generale del gruppo, pur nella prevalenza del Ca e nella sostituzione di Cu per Mn. La sua simmetria e pero ortorombica: cio comporta il dimezzamento dei parametrib ec della cella elementare rispetto ai termini noti.
Research Interests: Humanities and Art
... FS Stoppani, also a well-known amateur mineralogist. ... Prof. PF Zanazzi (Perugia) is determining the crystal structure of our mineral and kindly informed us on some of his results.Fabio Melchiorri greatly helped in the mineral... more
... FS Stoppani, also a well-known amateur mineralogist. ... Prof. PF Zanazzi (Perugia) is determining the crystal structure of our mineral and kindly informed us on some of his results.Fabio Melchiorri greatly helped in the mineral separation. Page 5. ...
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Research Interests: Archaeology, Geochemistry, Art, Archaeometry, Fresco, and 3 moreCinnabar, Polychrome, and Terracotta
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Frequently one finds black spots on pottery, glass, and bones from archaeological sites. These black stains of dendritic shape, anchored to porous surfaces, can hamper interpretation of artistic artifacts. The removal of these stains,... more
Frequently one finds black spots on pottery, glass, and bones from archaeological sites. These black stains of dendritic shape, anchored to porous surfaces, can hamper interpretation of artistic artifacts. The removal of these stains, until now, has been a serious problem. Using x-ray diffraction, scanning electron microscopy (SEM), and EPMA, the black spots were identified as manganese dendrites. The authors present the first results of a new chemical compound with reducing action and neutral pH, BDG 86, that quickly removes these black spots. To verify the efficacy of this chemical compound, the cleaning solution was analyzed after treatment by a continuous flux Autoanalyzer and AAS. The analyses confirmed that BDG 86 is an efficacious, quick acting, and harmless treatment for artifacts.
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This paper deals with the application of scanning electron microscopy (SEM), x-ray fluorescence (XRF), INA, and proton-induced x-ray emission (PIXE) analytical techniques to paper showing foxing marks. The reasons for the appearance of... more
This paper deals with the application of scanning electron microscopy (SEM), x-ray fluorescence (XRF), INA, and proton-induced x-ray emission (PIXE) analytical techniques to paper showing foxing marks. The reasons for the appearance of foxing are not yet fully understood nor is it known how its damage could be prevented. Recent research, including that by F. Gallo and G. Pasquariello, indicates a possible biological cause. Other researchers have proposed that the presence of iron and other heavy metals might be among factors favoring the development of foxing. Analysis of several paper samples was performed at different locations on the samples to determine the relationship between the visual appearance of the paper and its chemical composition. Foxing marks can be reproduced for experimental use by storing under specific conditions, suitable unmarked papers which have been contaminated with metals. Non-destructive analysis would aid in selection of samples for storage. Restoration ...
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... FS Stoppani, also a well-known amateur mineralogist. ... Prof. PF Zanazzi (Perugia) is determining the crystal structure of our mineral and kindly informed us on some of his results.Fabio Melchiorri greatly helped in the mineral... more
... FS Stoppani, also a well-known amateur mineralogist. ... Prof. PF Zanazzi (Perugia) is determining the crystal structure of our mineral and kindly informed us on some of his results.Fabio Melchiorri greatly helped in the mineral separation. Page 5. ...
Research Interests:
... FS Stoppani, also a well-known amateur mineralogist. ... Prof. PF Zanazzi (Perugia) is determining the crystal structure of our mineral and kindly informed us on some of his results.Fabio Melchiorri greatly helped in the mineral... more
... FS Stoppani, also a well-known amateur mineralogist. ... Prof. PF Zanazzi (Perugia) is determining the crystal structure of our mineral and kindly informed us on some of his results.Fabio Melchiorri greatly helped in the mineral separation. Page 5. ...
Research Interests:
The area corresponding to the modern city of Rome is usually known for the magnificent remains of the Roman civilization and the myths of its foundation in 753 BC. Less known is evidence of the prehistoric occupation occurring until the... more
The area corresponding to the modern city of Rome is usually known for the magnificent remains of the Roman civilization and the myths of its foundation in 753 BC. Less known is evidence of the prehistoric occupation occurring until the Bronze Age along the territory corresponding to the city of Rome and the surrounding area, called "Campagna Romana". Indeed, until a few years ago, the archaeological evidence relating to the phases of recent prehistory, from the Neolithic to the beginning of the Bronze Age, were completely, or almost completely, unknown. Recent excavations, mainly related to preventive archaeology, led to the identification of settlements and necropolises associated with a complex cultural scenario and shed light on the social and cultural aspects of daily life of the human groups who occupied this territory before the Latium civilization.
Della città di Roma, ben nota per le maestose vestigia riguardanti la civiltà romana e per i miti che precedono la sua fondazione avvenuta nel 753 a.C., sono poco conosciute le fasi antecedenti l’età del Bronzo finale , sia nell’area urbana, che nel territorio al di fuori delle mura, definito come “Campagna Romana” che va dal Neolitico antico fino agli inizi dell'età del Bronzo. Scavi recenti, legati principalmente all’archeologia preventiva, hanno portato all’individuazione di insediamenti e necropoli riferibili ad un complesso ed articolato panorama culturale, gettando luce su aspetti della vita quotidiana, sociale e culturale di gruppi umani che hanno occupato questo territorio prima della formazione della civiltà laziale.
Della città di Roma, ben nota per le maestose vestigia riguardanti la civiltà romana e per i miti che precedono la sua fondazione avvenuta nel 753 a.C., sono poco conosciute le fasi antecedenti l’età del Bronzo finale , sia nell’area urbana, che nel territorio al di fuori delle mura, definito come “Campagna Romana” che va dal Neolitico antico fino agli inizi dell'età del Bronzo. Scavi recenti, legati principalmente all’archeologia preventiva, hanno portato all’individuazione di insediamenti e necropoli riferibili ad un complesso ed articolato panorama culturale, gettando luce su aspetti della vita quotidiana, sociale e culturale di gruppi umani che hanno occupato questo territorio prima della formazione della civiltà laziale.