11. In the trigonal case there also exists a space group P3 1 12. 12. Levyne crystallizes in the Trigonal -Hexagonal Scalenohedral class. 13. Disphenoidal molecules, like trigonal bipyramidal ones, are subject to Berry pseudorotation. 14. The hexagonal crystal family consists of two crystal systems : trigonal and hexagonal. 15. Trigonal and hexagonal crystals revealed that trimers are arranged on a honeycomb lattice.16. Trigonal curves include the Picard curves, of genus three and given by an equation17. A high temperature form with titanium atoms with trigonal prismatic coordination is also known. 18. Each catalytic domain is composed of two stacked, mixed topology trigonal bipyramidal geometry. 19. Its structure consists of a tricapped trigonal prism, as determined by neutron crystallography. 20. Molecules with this geometry, as opposed to trigonal bipyramidal, exhibit heavier vibration.
