The high-temperature superconductor YBa2Cu3O7 was discovered in 1987 by M. K. Wu et al. as the first superconductor with a transition temperature above the boiling point of liquid nitrogen (77 K) (M.K. Wu et al. , Phys. Rev. Lett. 58 , 908 (1987)).
Transition temperature: | Tc = 92 K |
Crystalline structure: | Orthorombic |
Lattice constants: | a = 3.8231 Å, b = 3.8864 Å, c = 11.6807 Å |

Crystalline structure of the high-temperature superconductor YBa2Cu3O7, rendered by POV-Ray.
YBCO Movie
The corresponding POV-Ray source code can be downloaded here…