Lead selenide structure

Lead fluoride, 193 Lead halides, 197 bivalent structure, 193 Lead iodide, 194 Lead oxide structure, 202 Lead phosphates, 222 Lead selenide structure, 202 Lead sulfate, 222 Lead sulfide structure, 202 Lead tclluride structure, 202 Lewisite, 256 Lipophilicity... 

Clausthalite is a mineral composed of lead selenide (PbSe). The mineral adopts a NaCl-type structure. The density of PbSe at 25 "C is 8.27 g/cm Calculate the length of an edge of the PbSe unit cell. 

H. Wilman, The structure of photosensitive lead sulphide and lead selenide deposits and the effect of sensitization by oxygen, Proc. Phys. Soc. 60(2), 117-132 (1948). 

The structural chemistry of the actinides is often similar to that of lighter transition metals, such as Zr and Hf, and to that of the lanthanides however, the diffuse nature of the 5/ orbitals leads to some differences and specifically to interesting magnetic and electrical properties. The actinide sulfides are generally isostructural with the selenides, but not with the analogous tellurides. The binary chalcogenides of uranium and thorium have been discussed in detail [66], but the structural... 

Bromination of phosphine selenides leads to molecular phosphine selenide dibromides that contain T-shaped P-SeBr2 functions. Structural investigation of a series of closely related trialkylphosphine selenide dibromides RR 2PSeBr2 (R,R =zPr, /Bu) revealed remarkable differences in the packing of these T-shaped compounds.81... 

The valence-region x-ray photoelectron spectra of the lead chalcoge-nides have been reported by McFeely et al. (1973) as Fig. 6.7(a) shows, there is a remarkable similarity between the sulfide, selenide, and telluride. Band-structure calculations (e.g., Tung and Cohen, 1969 Rabii and... 

With sodium selenide the hexaiodide (281) forms the noradamantane (284). The structure of (284) was also confirmed by x-ray <80ZN(B)i 5i4,84CB2675, 84ZN(B)1344>. The reduction of (282) with alkaline hypophosphite leads to the noradamantane (285) <84CB2675>. The noradamantanes (284) and (286) result from melting the 4-methyl-1,2,6-triarsatricyclo[2.2.1.0 ]heptane (287) with elemental sulfur or selenium (Scheme 47) <84CB2675>. 

None of these methods is utterly satisfactory. The use of alkali-metal solutions in liq NH3 allows intercalation from Li to Cs to be covered. It can readily be used to prepare nonstoichiometric phases but the method presents experimental difficulties. Ammonia is often cointercalated, which favors the formation of trigonal prismatic intercalates owing to the preference of the NH3 for this type of site. On the other hand, the solvation of the A ions by NH3 may determine the composition of the final product in relation to the formation of stable complex species, with a definite formulation, between the slabs of the host. The thermal treatment necessary to remove the NHj may also lead to different structures than those formed at RT it certainly plays a role concerning the phase limits. Alkali-metal solutions in liq NH3 are powerful reducing solutions, and in the case of tellurides, or even for some selenides or sulfides, a reduction of the host structure can occur. 

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