Cooling history and emplacement of a pyroxenitic lava as proxy for understanding Martian lava flows

Cooling history and emplacement of a pyroxenitic lava as proxy for understanding Martian lava flows

Cooling history and emplacement of a pyroxenitic lava as proxy for understanding Martian lava flows Our PhD student Mara Murri at her second Scientific Reports paper for this year! Congratulations!! She has now concluded her studies on the...

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Limits to the Validity of Thermal-Pressure Equations of State

Limits to the Validity of Thermal-Pressure Equations of State

In this new manuscript Ross Angel shows that for thermal-pressure Equations of State (EoS) such as the Mie-Grüneisen-Debye (MGD) the assumptions, including the quasi-harmonic approximation (QHA) and a simplified phonon density of states need to...

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Another score for Mazzucchelli: Elastic geobarometry for anisotropic inclusions in cubic hosts

Another score for Mazzucchelli: Elastic geobarometry for anisotropic inclusions in cubic hosts

Another score for Mattia Mazzucchelli! In his new manuscript Mattia tackles the key issue of extending elastic barometry to anisotropic inclusions in cubic host! The change of strain in the inclusion can now be modelled using the axial equations...

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One more milestone: “Assessment of the reliability of elastic geobarometry with quartz inclusions”

One more milestone: “Assessment of the reliability of elastic geobarometry with quartz inclusions”

It took overall about three years but we think we now start understanding things. This is science, only 3 years to start understanding. Thank you Mattia Bonazzi for this wonderful opportunity and the brilliant work. Check out Mattia...

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Quantifying hexagonal stacking in diamond

Quantifying hexagonal stacking in diamond

Once again on the shock impact topic. In her new nice manuscript in Scientific Reports Mara Murri presents some of the recent considerations about structural disorder in the form of complex combinations of cubic and hexagonal stacking motifs...

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Quartz‐in‐garnet and Ti‐in‐quartz thermobarometry for gneiss from eastern Papua New Guinea

Quartz‐in‐garnet and Ti‐in‐quartz thermobarometry for gneiss from eastern Papua New Guinea

With this new manuscript just published in Journal of Metamorphic Geology Joe has done an excellent job in showing us advantages and limitations of elastic barometry (quartz in garnet) combined with chemical thermometry (Titanium in quartz) to...

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Multi-analytical characterization of Fe-rich magnetic inclusions in diamonds

Multi-analytical characterization of Fe-rich magnetic inclusions in diamonds

Our physicist Marco Piazzi has now finalized a very nice article that combines several methodologies for the investigation of the magnetic response of Fe rich inclusions in diamonds. Very exciting story!! For further reading the manuscript can be...

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The pressure‑induced phase transition(s) of ZrSiO4: revised

The pressure‑induced phase transition(s) of ZrSiO4: revised

A new brilliant manuscript by Boriana and Naemi that finally revise the phase transition(s) of ZrSiO4 at high pressure conditions. In this manuscript published in Physics and Chemistry of Minerals they present the experimental proof for the...

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Editors Selections: Notable papers on American Mineralogist (June 2019)

Editors Selections: Notable papers on American Mineralogist (June 2019)

Quoting the really nice paragraph by the Editors of American Mineralogist about our paper: “stangaronite….”! Stangarone et al. (page 830) used density functional theory (DFT) simulations of the structures of zircon and reidite...

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Viscosity experiments at superliquidus temperatures

Viscosity experiments at superliquidus temperatures

Rheology is the key factor to understand dynamic processes and behavior of magma rising through volcanic conduit and lava emplacement on Earth or other terrestrial planets. Today we can monitor the evolution of magma and volcanic mixtures by...

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Need an equation of state for a stiff anisotropic mineral?

Need an equation of state for a stiff anisotropic mineral?

In his latest manuscript Gabriele show us how to determine the thermo-elastic behaviour of rutile combining X-ray diffraction data at highP and high T together with direct elastic measurements.  The manuscript then presents a series of...

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Elastic geobarometry using zircons

Elastic geobarometry using zircons

In her latest study Claudia Stangarone carried out ab initio hybrid Hartree-Fock/Density Functional Theory simulations to determine the structure and vibrational modes of zircon, ZrSiO4, as a function of different applied strains. In her...

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Magnesiochromite inclusions in diamonds: what do they tell us?

Magnesiochromite inclusions in diamonds: what do they tell us?

In this new nice chapter of the saga of the orientation of inclusions in diamonds Paolo Nimis proposes the mechanical interaction between euhedral crystals in a fluid-rich environment as the most likely mechanism to produce the observed...

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New insights into the zircon-reidite phase transition

New insights into the zircon-reidite phase transition

Shock in meteorite impacts may transform zircon (ZrSiO4) into a denser polymorph, reidite, but the mechanism and significance of this transformation has been obscured by discrepancies between observations on natural and experimental samples. In...

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Structure and properties of quartz under non-hydrostatic stress

Structure and properties of quartz under non-hydrostatic stress

Mara Murri marks the beginning of the new year with an incredibly nice paper showing the effect of non-hydrostatic stresses on the structure of alpha-quartz. This investigation carried out through ab initio hybrid Hartree–Fock/DFT simulations...

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stRAinMAN software now released

stRAinMAN software now released

In his new paper published in Zeitschrift fuer Kristallographie Ross Angel explains the development of the past year that led to the current version of the stRAinMAN program. This allows the strains acting on inclusions trapped in their host to...

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Strain release after polishing

Strain release after polishing

In his new paper Nicola Campomenosi addresses the issues related to the release of the residual pressure in the inclusion due to exposure to the external pressure after polishing of the thin section. He illustrates with a careful set of...

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Determine strains on inclusions from Raman measurements

Determine strains on inclusions from Raman measurements

In her new paper published on American Mineralogist, Mara Murri, describes a method for determining the strains in quartz inclusions from Raman spectroscopy using the concept of the phonon-mode Grüneisen tensor, which we determine by ab initio...

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Experimental validation of intracrystalline “geothermometry” for rocks

Experimental validation of intracrystalline “geothermometry” for rocks

In this paper, we test the available experimental calibrations for clino and orthopyroxenes as geothermometer by determining their site in synthetic samples grown from a hydrous nepheline basanite in a piston-cylinder apparatus at 1050 °C at...

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Finite Element modelling of stresses in inclusions by Mattia L. Mazzucchelli on Geology. 

Finite Element modelling of stresses in inclusions by Mattia L. Mazzucchelli on Geology. 

Check our our latest paper on Finite Element modelling of stresses in inclusions by Mattia L. Mazzucchelli on Geology. Elastic geothermobarometry on inclusions is a method to determine pressure-temperature conditions of mineral growth independent...

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First evidence that Raman does not measure stresses on inclusions

First evidence that Raman does not measure stresses on inclusions

Our paper on elastic barometry illustrates the difficulties related to Raman measurements on non-cubic inclusions has just been published on American Mineralogist. In her manuscript Chiara Anzolini give us an idea of the greatest source of errors...

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EosFit-Pinc released

EosFit-Pinc released

An exact solution to the problem in elastic geobarometry of combining non-linear Equations of State (EoS) with the elastic relaxation for elastically isotropic spherical host-inclusion systems without any approximations of linear elasticity is...

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40 Years of mineral elasticity a critical review and new equation of state for mantle olivines

40 Years of mineral elasticity a critical review and new equation of state for mantle olivines

The new review manuscript by Ross Angel “40 years of mineral elasticity: a critical review and a new parameterisation of equations of state for mantle olivines and diamond inclusions” has just been published online on Physics and...

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Continuous phase transitions in EosFit

Continuous phase transitions in EosFit

Continuous phase transitions in minerals, such as the α–β transition in quartz, can give rise to very large non-linear variations in their volume and density with temperature and pressure. In Angel et al 2017 we present a simplified description...

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Thermo-elastic behavior of grossular garnet

Thermo-elastic behavior of grossular garnet

In her manuscript Sula Milani provides for the first time consistent the thermo-elastic parameters for grossular garnet using simultaneous fitting of pressure-volume-temperature data combined with either adiabatic (KS) or isothermal bulk modulus...

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