The compound crystallizes in the triclinic crystal
system with space group P-1, a = 8.6305(11) A, b = 8.9318 (11) A, c = 17.3824 (13) A and [alpha] = 81.070 (8)Adeg, [beta] = 81.690 (9)Adeg, I3 = 80.757 (11)Adeg.
The ZnMo[O.sub.4] belongs to the triclinic crystal
system with space group P1.
The [gamma] crystal, a triclinic crystal
structure (19, 20) of polypropylene, has attracted attention for years, but it is usually obtained only in traces under normal crystallization conditions.
, making use of their own simulated annealing program to define the positions, orientations and conformations of the molecules in the structure, and fluorescein diacetate , [C.sub.24][H.sub.16][O.sub.7], where the molecular structure and triclinic crystal
structure were solved without any prior crystallographic information by direct methods.
The lack of symmetry in triclinic crystals
of course limits the chances to correct deviations in each model.
The characteristic brittle, vitreous, transparent to translucent triclinic crystals
are pale green when large and colorless when small.
For triclinic crystals
, the reduced cell is routinely used.
In 1947 Graham determined a unit cell by X-ray (Weissenberg photo) techniques, and changed Schaller's original setting to Peacock's normal setting for triclinic crystals
. The crystal structure of turquoise was eventually solved using a Bishop mine specimen (CidDresdner, 1964).
Saneroite, a rare sodium and manganese silicate, was found for the first time at the Gambatesa mine as tabular triclinic crystals
up to a few millimeters, associated with braunite and barite.
(4) The definition of the optical orientation of triclinic crystals