New relationships among the low-temperature alkali feldspars were deduced in part and implied in whole by recent crystal structure analyses of low and high albite and consideration of the electrostatic charge distributions in all the known alkali feldspar structures by Ferguson, Traill & Taylor. In general the most stable low-temperature forms are not those most highly ordered with respect to A...

Acluster[ pt (Reo )(?-dppm) ][Reo ],2 [dppm=ph Pch ] with oxidaton of [pt Re(CO) ](?-dppm) ][PF ] is prepred . Crystals are triclinic,pl; a= 14.154(4)?, b=14.213(3) ?,c = 20.522(4) ? , a = 78.938(14)?, ?= 75.812(19) ? , ?= 74,957(22) ? ;v = 3828.9(1 5) ? ,z =2 ; Eraf-Noniu CAD4 difhctorneter with Mo- K radiation, ? = 0.71073 ? ; R = 0.069, R = 0.077 for 284 parameters and 5414 reflect...

We analyze the stability of laminated microstructure for martensitic crystals that undergo cubic to trigonal, orthorhombic to triclinic, and trigonal to monoclinic transformations. We show that the microstructure is unique and stable for all laminates except when the lattice parameters satisfy certain identities.

Tetracarbonyl(2,2'-dipyridylamine)tungsten was prepared from W(CO)6 and 2,2'-dipyridylamine in toluene. The structure was determined by an X-ray diffraction analysis. Crystal data: triclinic; space group, P-1 (No.2); a = 8.454(1)A, b = 13.369(2)A, c = 6.9452(9) A, a= 85.88(1) degrees, beta = 68.28(1) degrees, gamma = 80.93(1) degrees, V= 720.0(1)AI; Z = 2.