A5058244656- X-ray Diffraction in Crystallography
- High-pressure geophysics and materials
- Crystal Structures and Properties
- Crystallization and Solubility Studies
- Geological and Geochemical Analysis
- Zeolite Catalysis and Synthesis
- Nuclear materials and radiation effects
- Clay minerals and soil interactions
- Crystallography and molecular interactions
- Mineralogy and Gemology Studies
- Glass properties and applications
- Radioactive element chemistry and processing
- Advanced ceramic materials synthesis
- Chemical Synthesis and Characterization
- Metal-Organic Frameworks: Synthesis and Applications
- Concrete and Cement Materials Research
- earthquake and tectonic studies
- Hydrocarbon exploration and reservoir analysis
- Mesoporous Materials and Catalysis
- Methane Hydrates and Related Phenomena
- Thermal and Kinetic Analysis
- Particle Accelerators and Free-Electron Lasers
- Advancements in Photolithography Techniques
- Advanced X-ray Imaging Techniques
- Radiation Shielding Materials Analysis
University of Milan
2016-2025
Elettra-Sincrotrone Trieste S.C.p.A.
2016-2019
Mylan (Switzerland)
2009
We report the crystal structure of dolomite-IV, a high-pressure polymorph Fe-dolomite stabilized at 115 GPa and 2500 K. It is orthorhombic, space group Pnma, =10.091(3), b = 8.090(7), c 4.533(3) Å, V 370.1(4) Å3 115.2 ambient temperature. The based on presence threefold C3O9 carbonate rings, with carbon in tetrahedral coordination. starting single during compression up to transforms into dolomite-II (at 17 GPa) dolomite-IIIb 36 GPa). dolomite-IIIb, observed this study, rhombohedral, R3,...
ABSTRACT Marine shells containing greenish or blackish pigments are frequently found at pre‐Islamic archaeological sites in Southeast Arabia and generally interpreted as ancient eye makeup, representing a long‐standing tradition that continues to the present day. While these ‘cosmetic’ primarily funerary contexts, their presence residential areas suggests broader use within community. Although relatively abundant, have undergone limited chemical mineralogical analysis, hindering deeper...
In this study the first in situ high-pressure single-crystal X-ray diffraction experiments at Xpress, Indo-Italian beamline of Elettra synchrotron, Trieste (Italy), are reported. A description experimental setup and procedures for centring, data collection processing, using diamond anvil cells, provided. High-pressure on a synthetic crystal clinoenstatite (MgSiO3), CaCO3 polymorphs natural sample leucophoenicite [Mn7Si3O12(OH)2] validated suitability to: (i) locate characterize...
We report the thermal expansion and compressibility of carbonates in ternary compositional diagram CaCO3-MgCO3-FeCO3, determined by situ X-ray powder single-crystal diffraction. High-temperature experiments were performed high-resolution synchrotron diffraction from ambient to decarbonation temperatures (25–850 °C). Single-crystal X ray a variable pressure range (0–100 GPa), depending on stability field rhombohedral structure at temperature, which is function carbonate composition. The...
CaSiO3 polymorphs are abundant in only unique geological settings on the Earth’s surface and major Ca-bearing phases at deep mantle condition. An accurate comprehensive study of their density structural evolution with pressure temperature is still lacking. Therefore, this we report elastic behavior wollastonite CaSiO3-walstromite pressure. Both minerals characterized by first order phase transitions to denser structures. The deformations that lead these transformations allow a volume...
Abstract The high-pressure behavior of a synthetic mordenite-Na (space group: Cmcm or Cmc 2 1 ) was studied by in situ single-crystal synchrotron X-ray diffraction with diamond anvil cell up to 9.22(7) GPa. A phase transition, likely displacive character, occurred between 1.68(7) and 2.70(8) GPa, from C -centered primitive space possibly Pbnm , Pbnn Pbn . Fitting the experimental data III-BM equations state allowed describe elastic polymorph lattice. very high volume compressibility [ K V 0...
This is a review of the thermal and compressional behavior cancrinite-group minerals with description mechanisms, at atomic scale, that govern their P-T-induced structure evolution. The open-framework this group feldspathoids characterized by [CAN] topology, which contains large parallel channels (confined 12-membered rings tetrahedra), surrounded columns cages. At least two structural “subgroups” can be identified according to nature constituents filling cages, irrespective channel...
The high-pressure behavior of cordierite was investigated by means in situ experiments using piston-cylinder press and diamond-anvil cell. Static compression cells conducted with various penetrating non-penetrating pressure media (H 2 O up to GPa, argon 4:1-methanol-ethanol 7 GPa). measurement lattice parameters revealed neither a significant influence on the elasticity nor any indication for effects analogy over-hydration within experimental ranges. Volumetric at constant rates 1.2 GPa...
Phase stability, elastic behavior, and pressure‐induced structural evolution of synthetic boron‐mullite Al 5 BO 9 ( a = 5.6780(7), b 15.035(6), c =7.698(3) Å, space group Cmc 2 1 , Z 4) were investigated up to 25.6(1) GPa by in situ single‐crystal synchrotron X‐ray diffraction with diamond anvil cell (DAC) under hydrostatic conditions. No evidence phase transition was observed 21.7(1) GPa. At GPa, the refined unit‐cell parameters deviated significantly from compressional trend, peaks...
The pre-disposal management of Radioactive Liquid Organic Waste (RLOW) is hampered by its challenging physico-chemical properties. In this work, a straightforward conditioning option based on RLOW impregnation absorbing materials and followed encapsulation in stable geopolymeric matrix proposed, avoiding onerous pre-treatments the use surfactants. Recycled have been investigated as adsorbent geopolymer precursors to foster process sustainability. Relevant properties studied ascertain waste...
The high-pressure elastic behavior and the P-induced structure evolution of a natural cancrinite from Cameroun {Na6.59Ca0.93[Si6Al6O24](CO3)1.04F0.41·2H2O, = 12.5976(6) Å, c 5 .1168(2) space group: P63} were investigated by in situ single-crystal X-ray diffraction under hydrostatic conditions up to 6.63(2) GPa with diamond-anvil cell. P-V data fitted an isothermal Birch-Murnaghan type equation state (BM EoS) truncated third order. Weighted fit (by uncertainty P V) gave following parameters:...
Abstract Colemanite (ideally CaB 3 O 4 ( OH ) ·H 2 O, space group P 1 / a , unit‐cell parameters: ~ 8.74, b 11.26, c 6.10 Å, β 110.1°) is one of the principal mineralogical components borate deposits and most important mineral commodity boron. Its high‐pressure behavior here described, for first time, by means in situ single‐crystal synchrotron X‐ray diffraction with diamond anvil cell up to 24 GPa (and 293 K). stable, its ambient‐conditions polymorph, 13.95 GPa. Between 14.91 GPa, an...
Abstract The high-pressure structural evolution of a natural 3 T- phengite [(K 0.90 Na 0.05 ) S = 0.95 (Al 1.51 Mg 0.32 Fe 0.18 Ti 0.03 2.04 (Si 3.40 Al 0.60 )O 10 (OH) 2 , b 5.2279(11) and c 29.752(7) Å, space group: P 1 12] from Cima Pal (Sesia Zone, Western Alps, Italy) was studied by single-crystal X-ray diffraction with diamond anvil cell under hydrostatic conditions up to about GPa. Nine refinements were performed at selected pressures within the -range investigated. compressional...