Monoclinic space groups

Crystallographic quality ciystals of indinavir sulfate salt were grown hy slow diffusion of methanol into an ethanol/water solution. As confirmed by TG/IR results, the crystals obtained were a mixed mono-methanol / mono-ethanol solvate. The compound crystallized in the P2, space group, (monoclinic crystal system) with 2 molecules per unit cell. The cell constants were found to be a= 14.321(1)A, 6 = 10.091(1)A, c = 15.192(1)A, P = 95.50(1)°, andV=2185.5A. The calculated density was 1.200 g/cm. A view of the crystallographic unit cell packing is shown in Figure 4, with the solvent molecules omitted [7]. 

This crystal, which belongs to the space group monoclinic C2, is associated with the piezoelectric tensor (chain axis = c-axis) ... 

The natural usovite Ba2CaMgAl2F14 [13] crystallizes in the C2Ic space group (monoclinic) as it may be seen in Fig. 7, its structure presents layers [(CaMgAl2F 4)4-]oq the (100) plane, separated by Ba2+ ions. In these layers, Mg2+ and Al3+ occupy octahedral sites, whereas Ca2+ is 8-fold coordinated, its surrounding fluoride ions forming roughly a square-antiprism. 

Formula Chemical class Chemical type Mg2(C03)(0H)2-3I 0 Crystal system Hydrated carbonate with hydroxyl or halogen Mineral group A B (X0j)pZ, xH20 with (m+n) p = 2 1 Space group Monoclinic Hydromagnesite C2/m... 

Formula Chemical class Chemical type BaCa(COj)2 Crystal system Anhydrous normal carbonate Mineral group AB(XOj)2 Space group Monoclinic Aragonite P2j/m... 

Formula Chemical class Chemical type (Cu,Ni),(C03)(0H), Anhydrous carbonate with hydroxyl or halogen (AB)3(X03>Z, Crystal system Mineral group Space group Monoclinic, pseudo-orthorhombic. Malachite (rosasite) 9... 

Formula Chemical class Chemical type NiC03-6H20 Crystal system Hydrated normal carbonate Mineral group ACXOjI xHiO Space group Monoclinic Nesquehonite C2/C... 

Formula Chemical class Chemical type Pb4(S04)(C03)2(0H)2 Crystal system Compound carbonate Mineral group Miscellaneous Space group Monoclinic Susannite P2i/a... 

Formula Chemical class Chemical type NaHCOj Add carbonate Miscellaneous Crystal system Mineral group Space group Monoclinic Nahcolite P2i/b... 

Maul] orthorhombic a=4.62, ft=5.61, c=3.45 (X, powder. Synthesis from mixtures of the elements in evacuated silica tubes at 1000°C (some days) and quenched. Mixture of alloclasite and cobaltite). As2-,CoS, (x=0---1.2) space group monoclinic-orthorhombic. Saffloiite-alloclasite-type. For lattice parameters, see Fig. 43. For x=0, monoclinic safflorite. For 0small values of x the diagrams correspond to those of safflorite, but with increasing x they approach to those of alloclasite. For x> 1 no alloclasite but cobaltite is formed. 

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