Microcrystals of coesite and stishovite were discovered as inclusions in amorphous silica grains in shocked melt pockets of a lunar meteorite Asuka-881757 by micro-Raman spectrometry, scanning ...

First-principles calculations illuminate the nature of the modulated phase transitions of coesite and elucidate the modulated structures of coesite caused by modulations along the y-axis direction.

While stishovite and coesite are thermally metastable up to 500 and >1000 degrees C, respectively, their hydrothermal metastability is below 150 and 200 degrees C, respectively. The thermally induced ...

Some of the major inclusions in the diamond, including enstatite, ringwoodite, coesite, and possibly perovskite. (Gu et al., Nat. Geosci., 2022) Deep below the surface of our world, far beyond our ...

The moon is a barren and desolate place, with no signs of life or civilization. But there is one human being who rests there in eternal peace: Dr. Eugene Shoemaker, a pioneer of planetary science ...

Examining how plates move in Earth's mantle and how mountains form is no easy feat. Certain rocks that have sunk deep into Earth's interior and then returned from there can deliver answers.

The discovery of coesite, a high-pressure polymorph of quartz, which is tiny but indicator mineral of ultrahigh-pressure (UHP) metamorphism, from the continental crust rocks in the 1980s ...

One tell-tale sign of a planetary asteroid impact is the presence of the mineral coesite, a variant of quartz that forms only under intense heat and pressure.

Some of the major inclusions in the diamond, including enstatite, ringwoodite, coesite, and possibly perovskite. (Gu et al., Nat. Geosci., 2022) Deep below the surface of our world, far beyond our ...

The pressure of the phase transition from α quartz to coesite was found to be closely related to the differential stress and the presence of coesite at the interface between the indenter and the ...

The phase transition material used for the pressure calibration at high temperatures was a quartz-coesite with a quartz particle size of 150 um. This was pressed into a sample with a diameter of 2 mm ...