triclinic system

triclinic system

[trī′klin·ik ′sis·təm]
(crystallography)
The most general and least symmetric crystal system, referred to by three axes of different length which are not at right angles to one another.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The crystals of compound 1 having molecular formula C20H30N2O2S (1) appeared as triclinic system with space group PA-1 with a = 4.9924 (4), b = 8.9854 (9),, c = 24.236 (2), [alpha]=90.032 (5)Adeg, [beta] = 94.876 (4)Adeg, I3=103.866 (4), V (A3) = 1051.46 (17), Z = 2, Mr = 362.52.
X-ray single-crystal diffraction analysis showed that complex 1 belongs to the monoclinic system, C2/c space group, and both complexes 2 and 3 belong to the triclinic system, P-1 space group.
Compound 7a crystallized in the triclinic system with the space group PI.
The crystal structure of TQ has been determined using high-resolution X-ray powder diffraction, which showed that TQ belongs to the triclinic system. Weak Vander Walls forces have been found in the molecules by thermal analysis (Pagola et al., 2004).
The triclinic system has three-dimensional geometry that is similar towards the form of crystal resulted from the synthesis showed by SEM image (Figure 3) with different sloping edge and corners.
The compound crystallizes in the triclinic system, space group P-1, with lattice parameters a= 7.6893 (5) [Angstrom], b= 11.0169 (7) [Angstrom], c= 11.2369 (7) [Angstrom], [alpha]= 66.2610 [(10).sup.[omicron]], [beta]= 74.4160 [(10).sup.[omicron]], [gamma]=74.6740 [(10).sup.[omicron]].
Thus in the triclinic system, the reduced cell which is based on the shortest three non-coplanar vectors of the lattice is chosen with the edges obeying a [less than or equal to] b [less than or equal to] c.
The compound crystallizes in the triclinic system, space group PA-1 with a = 4.9122 (5), b = s9.5891 (11), c = 15.4851 (18)A, [alpha] = 92.371 (5), [beta] = 90.015 (4), I3 = 101.722 (5) Z = 2 and V (A3) = 713.55 (14).
(5) In the triclinic system, the conventional cell is the reduced cell with a [less than or equal to] b [less than or equal to] c.
The title 1,2,4-triazole crystallizes in the triclinic system, space group P-1 with a 7.3111(15), b 8.8637(18), c 11.514(2) A , x 69.09(3), B 80.17(3), 72.08(3), V 661.6(2) A 3, Z 2, F(000) 308, Dc 1.482 g/cm3, 0.262 mm-1, for 1960 observed reflections with I greater than 2s(I).