Laboratorio Diffrattometria Raggi X Cristallo Singolo

Responsabile scientifico
Prof. Fabrizio Nestola (049 827 9160)

Preposto alla sicurezza
Dott. Daria Pasqual (049 827 9139)

Telefono

Sede
via G. Gradenigo, 6 - 35131 Padova (I)
Fax +39 049 827 9134

Orario di apertura
Lun, Ven 8.00-17.00

Strumentazione (file PDF)

Norme di gestione

Richieste di prestazioni (file PDF)
Accesso al laboratorio (file PDF)

Gli strumenti presenti nel laboratorio sono:
- diffrattometro a 4 cerchi STOE STADI IV a rivelatore puntuale, operante con il software SINGLE (Angel and Finger, 2011) per misure ad elevata precisione;
- diffrattometro a 4 cerchi STOE STADI IV a rivelatore areale CCD (Oxford Diffraction) per determinazioni strutturali.
Il laboratorio dispone di 3 incudini di diamante tipo ETH (Zurigo), che permettono misure diffrattometriche in-situ ad altissima pressione per simulare le condizioni presenti nel mantello terrestre.
Il laboratorio è coinvolto in numerose collaborazioni nazionali e internazionali riguardanti la cristallografia di base e la cristallografia in condizioni estreme di pressione.

The instruments in the laboratory are:
- STOE STADI IV 4-circle diffractometer equipped with point detector, operated with the SINGLE software (Angel and Finger, 2011) to perform high precision measurements;
- STOE STADI IV 4-circle diffractometer equipped with area detector CCD detector (Oxford Diffraction) for structure determination.
Three diamond anvil cells (ETH type) are available to perform in-situ high pressure measurements to reproduce in the laboratory the high-pressure conditions of the Earth’s mantle.
The laboratory is involved in several national and international collaborations using crystallography at room and high-pressure conditions.

Per saperne di più

SINGLE-CRYSTAL X-RAY DIFFRACTION

Single-crystal X-ray diffraction is the most powerful experimental technique to determine the crystal structure of a crystalline compound. Therefore, it represents the first step to “explore” the crystalline material properties.

This is possible using 4-circles diffractometers.

The laboratory is equipped with two single-crystal X-ray diffractometers:

STOE STADI IV 4-circle diffractometer equipped with Mo source and point detector, operating with the SINGLE software (Angel and Finger, 2011) to perform high-accuracy and high-precision unit-cell parameter determination:


Point detector STOE STADI IV	Diffraction peak centered using SINGLE

STOE STADI IV 4-circle diffractometer equipped with Mo source and area detector CCD detector (Oxford Diffraction) suitable for rapid identification and structure determination:


CCD area detector STOE STADI IV	Diffraction pattern collected using a CCD detector

Three diamond anvil cells (DAC, ETH type) are available to perform in-situ high pressure measurements to reproduce in the laboratory the high-pressure conditions of the Earth’s mantle:


Diamond anvil cell (ETH type)	View through the diamonds into the DAC

The final result of single-crystal X-ray diffraction technique is a “real” picture of a crystalline compound at the atomic scale, even for very complex atomic arrangements and under extreme conditions of temperature and pressure.

The laboratory is involved in several national and international collaborations using crystallography at room and high-pressure conditions

Research fields

Compressibility.
Physical properties of minerals.
Crystal structure evolution under non ambient conditions.
Determination of thermodynamic properties of feldspars, olivine, antigorite, clino and orthopyroxenes, garnets, spinels as a function of composition and pressure and their applications to geodynamics and geophysics of the Earth’s crust and mantle.
Investigation of new mineral species.
Identification and characterization of mineral inclusions in diamonds from upper and lower mantle. Develop of new experimental approach for measurements the inclusions in situ preserving the diamonds.
Mineralogy of surface of Mercury from remote sensing acquisition in the Bepi Colombo ESA space mission.
Structure solving of new MOF compounds.

People

Faculty staff: Prof. Fabrizio Nestola, Prof. Luciano Secco.
Technical staff: Dr. Daria Pasqual.
Post-doc students: Matteo Parisatto.
PhD students: Sabrina Ferrari, Alessandro Guastoni, Arianna Lanza, Sula Milani, Francesco Pandolfo, Benedetta Periotto, Luca Ziberna.