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RESEARCH PRODUCT
Pressure-induced phase transformations in mineral chalcocite, Cu2S, under hydrostatic conditions
Claus MühleGaston GarbarinoDavid Santamaría-pérezDavid Santamaría-pérezM.a. DobrowolskiM.a. DobrowolskiRaquel Chuliá-jordánMartin Jansensubject
DiffractionPhase transitionChalcociteChemistryMechanical EngineeringMetals and AlloysAnalytical chemistryMineralogySynchrotron radiationmacromolecular substancesengineering.materialPolymorphism (materials science)Mechanics of MaterialsMaterials ChemistryCompressibilityengineeringPowder diffractionMonoclinic crystal systemdescription
Abstract High-pressure room-temperature angle-dispersive powder X-ray diffraction measurements on Cu2S chalcocite were performed up to 30 GPa using a diamond-anvil cell, He as pressure transmitting medium and synchrotron radiation. Two first-order phase transitions were found at 3.2 and 7.4 GPa. The indexation of the powder diffraction patterns suggests three different monoclinic cells for the low-pressure chalcocite and the two high-pressure phases. Subtle changes in the X-ray diffraction patterns suggest a third pressure-induced transition above 26 GPa. Structural parameters and compressibility are discussed and compared to those reported in a previous study on Cu2S nanowires.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2014-10-01 | Journal of Alloys and Compounds |