monoclinic system

monoclinic system

[¦män·ə′klin·ik ‚sis·təm]
(crystallography)
One of the six crystal systems characterized by a single, two-fold symmetry axis or a single symmetry plane.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The crystal complex crystallizes in the monoclinic system with space group P2 (1)/c.
The analyzed results were packing of a monoclinic system (a = 4.85 [Angstrom], b = 6.47 [Angstrom], c = 16.03 [Angstrom], [alpha] = [gamma] = 90[degrees], [beta] = 117.9[degrees]).
The crystal structure of the complex belongs to monoclinic system and space group P2(l)/n, with cell parameters of a = 9.8468(7) [Angstrom], b = 5.2013(4) [Angstrom], c = 14.6041(15) [Angstrom], [beta] = 111.745(6)[degrees], Z = 2, and Dc = 1.666 g [cm.sup.-3].
XRD analysis indicates that the crystal belongs to a monoclinic system with unit cell parameters a = 1.1028 nm, b = 0.6556 nm, c = 0.9114 nm, and [beta] = 91.431[degrees].
By refinement of experimental X-ray data of as deposited W[O.sub.3] using the software DICVOL04, the data finds that they are in good agreement with the monoclinic system reported in the ICDD PDF (20-1324) (W[O.sub.3])[15].
It crystallizes in the monoclinic system and is isostructural with herderite.
In the monoclinic system, the cell is based on the shortest possible vectors in the ac plane with b the unique axis.
Optical data: Biaxial (-), [alpha] 1.99, [beta] 2.03, [gamma] 2.06, 2V(meas.) large, 2V (calc.) 80[degrees]; dispersion r < v, significant; nonpleochroic; orientation is given as X (or Y) ^ a = -11[degrees], Z = c, but this is not possible in the monoclinic system. Chemical analytical data: Means of four sets of electron microprobe data ([H.sub.2]O calculated from the ideal formula): CuO 2.46, ZnO 0.08, PbO 65.95, A[l.sub.2][O.sub.3] 5.75, F[e.sub.2][O.sub.3] 0.05, [P.sub.2][O.sub.5] 11.67, [V.sub.2][O.sub.5] 9.84, A[s.sub.2][O.sub.5] 0.06, S[O.sub.3] 0.10, Cr[O.sub.3] 1.99, [H.sub.2]O (1.35), Total (99.30) wt.%.
Carbon tetrachloride III crystallizes in the monoclinic system ([P2.sub.1]/c, Z= 4) with unit cell dimensions a = (9.079[+ or -]0.012)A, b = (5.764[+ or -]0.003)A, c = (9.201[+ or -]0.004)A, and [beta] - 104.29[degrees][+ or -]0.05[degrees].