Recent improvements at synchrotron beamlines and on Diamond Anvil Cells techniques allow single crystal diffraction experiments at non ambient conditions on very small crystals, one order of magnitude smaller compared to samples routinely investigated on conventional laboratory sources. Three examples concerning high pressure single crystal diffractions at Earth’s Mantle conditions will be illustrated and discussed: structural determination of CaFe2O4 and CaCO3 across electron Fe 3+ and Fe2+ spin transition (around 50 GPa) and elasticity and phase transitions of CaFeO2.5 defective brownmillerite/perovskite at lower mantle conditions.
Single crystal diffraction at earth’s mantle conditions / M. Merlini. ((Intervento presentato al 26. convegno European Crystallographic Meeting tenutosi a Darmstadt nel 2010.
Single crystal diffraction at earth’s mantle conditions
M. MerliniPrimo
2010
Abstract
Recent improvements at synchrotron beamlines and on Diamond Anvil Cells techniques allow single crystal diffraction experiments at non ambient conditions on very small crystals, one order of magnitude smaller compared to samples routinely investigated on conventional laboratory sources. Three examples concerning high pressure single crystal diffractions at Earth’s Mantle conditions will be illustrated and discussed: structural determination of CaFe2O4 and CaCO3 across electron Fe 3+ and Fe2+ spin transition (around 50 GPa) and elasticity and phase transitions of CaFeO2.5 defective brownmillerite/perovskite at lower mantle conditions.
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