triclinic crystal

triclinic crystal

[trī′klin·ik ′krist·əl]
(crystallography)
A crystal whose unit cell has axes which are not at right angles, and are unequal. Also known as anorthic crystal.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
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 [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.
[6], making use of their own simulated annealing program to define the positions, orientations and conformations of the molecules in the structure, and fluorescein diacetate [7], [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.
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 is incomplete.