A team of physicists recently discovered a new phase of water ice, after they put ordinary ice under extraordinarily high pressure and melted it before letting it refreeze. The previously unknown ...

This is the tetragonal crystal structure of NaFe2As2, courtesy of Alexander Goncharov. Sodium (Na) is represented by the black balls, iron (Fe) by the red balls, and arsenic (As) by the yellow balls.

Tetragonal zirconia polycrystal (TZP) is commonly stabilized with 3% to 5% Yttria and has the finest grain size. Since they are almost entirely tetragonal, these zirconia grades have the maximum ...

Engineering ceramics such as zirconia (ZrO 2), alumina (Al 2 O 3), silicon nitride (Si 3 N 4), silicon carbide (SiC) etc. have been used more frequently in engineering applications as engineers and ...