The cation sits at the center of a trigonal prism.
2.
Its structure consists of a tricapped trigonal prism, as determined by neutron crystallography.
3.
Each trigonal prism shares two rectangular faces with the nearby prisms, forming infinite prism columns.
4.
The M1 and M2 cites create distorted pentagonal bipyramids while the M3 and M4 create tricapped trigonal prisms.
5.
Isostructural with, consists of a trigonal prism with Re atom in the center and six hydrogen atoms at the corners.
6.
Nine fluorides are close : three at the bottom corners of the trigonal prism, three in the faces of the trigonal prism, and three at top corners of the trigonal prism.
7.
Nine fluorides are close : three at the bottom corners of the trigonal prism, three in the faces of the trigonal prism, and three at top corners of the trigonal prism.
8.
Nine fluorides are close : three at the bottom corners of the trigonal prism, three in the faces of the trigonal prism, and three at top corners of the trigonal prism.
9.
With bismuth ( III ) there is indirect evidence for a solvation number of 9 . A nonahydrate is been characterized in the solid state, with a face-capped trigonal prism structure.
10.
An alternative preparation procedure is to exposure einsteinium ( III ) oxide to chlorine trifluoride ( ClF 3 ) or F 2 gas at a pressure of 1 2 atmospheres and a temperature between 300 and 400 �C . The EsF 3 crystal structure is hexagonal, as in californium ( III ) fluoride ( CfF 3 ) where the Es 3 + ions are 8-fold coordinated by fluorine ions in a bicapped trigonal prism arrangement.
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