Researchers have solved a mystery that has confounded scientists for 80 years: the crystal structure of the ...

Researchers have solved a mystery that has confounded scientists for 80 years: the crystal structure of the tetra-n-butylammonium bromide (TBAB ...

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.

IT was first shown by W. L. Fink and E. D. Campbell (Trans. Am. Soc. Steel Treat., 9, 717; 1926), and independently by N. Seljakow, J. Kurdumoff, and N. Goodtzow (NATURE, 119, 494; 1927), that ...

That tetragonal structure also sets Ice-VIIt (the ‘t’ is for ‘tetragonal’) apart from the hexagonal symmetry of natural water ice (known as Ice-I). That means its crystal structure looks ...

HfO 2 and ZrO 2, in contrast, have a fluorite structure, AB 2. Ferroelectricity comes from tension on the a-axis of the crystal due to movement of the ions. At high Hf concentrations, the equilibrium ...

This is the collapsed tetragonal crystal structure of NaFe2As2, with arsenic (As) atoms in a 5-fold coordination, courtesy of Alexander Goncharov. Sodium (Na) is represented by the black balls ...