Silver interatomic distance

Other Covalent Radii. In Cu20 and Ag20 each metal atom is equidistant from two nearest oxygen atoms, the interatomic distances corresponding to the radius values 1.18 and 1.39 A for Cu1 and Agl with coordination number two. In KAg(GN)2, in which each silver atom is similarly attached to two cyanide groups1), the effective radius of Agl is 1.36 A. It has been pointed out to us by Dr. Hoard that the work of Braekken2) indicates the presence of strings —Ag—G=N—Ag—G... 

Radii for metal atoms forming only one bond can be found from the interatomic distances obtained from band spectra of molecules such as Ag1, etc. The available data for the silver halides lead to a radius of about 1.12 A for Ag1. The change of radius with change in number of bonds is strikingly shown by silver, with radius 1.53 A for four bonds, 1.36 A for two, and 1.12 A for one. 

The interatomic distances for such an intermediate were calculated,288 and, using the resulting data in conjunction with certain steric and oxidizing-potential considerations, it was successfully predicted that sodium bis-muthate and trivalent silver ion would also specifically oxidize 1,2-glycols. These reactions have since been studied.287 288... 

Silver crystallizes in the face-centered cubic (fee) form, (a) Make a sketch of the three basal faces of silver with the Miller indices [i.e., (100), (110), and (111)] and calculate the atom densities on these faces in atoms per cm2. The interatomic distance of Ag-Ag is equal to 0.2889 nm. (b) If only geometric factors are responsible for differences in the adsorption, what is the sequence of the surface concentration of adsorbed species on the individual planes (Bockris)... 

Figure 4 STM image of Ag (111) with (y) oxygen. The interatomic distance of silver measured along the white line is 0.285 nm. For the hole contrast see text.

Similarly, the reaction between the silver tetrafluoroborate and silver nitrate with the assembling ligand tmb leads to corresponding polymers 25 and 26.53 Weak anion-silver interactions were depicted based on shorter interatomic distances measured in the X-ray structures. 

P-11 The complex cation in 108 has chair conformation. Interatomic distances Au—P 0.2289 nm, Au-Au 0.3045 nm. Although the Au-Au distance is somewhat larger than typical Au-Au single bonds (0.2757-0.2780 nm), the contact is closer than twice the van der Waals radius and bonding can be considered to exist203. See item X-2 in Table 3 for a similar case with silver, where no metal-to-metal bonding exists. See also item P-4 above. 

C-2b c In the cationic Ag(I) arylacetylide complexes [Ag3(dppm)3L]2+ (111) and [Ag3(dppm)3L2] + (112) the trinuclear silver cluster has triangular pyramidal or bipyramidal geometry, with acetylenic C atoms in apical positions. Interatomic distances, 111 Ag—Ag... 

The Size-Factor Effect. The importance of size-factor in determining whether a solid solution may form between any two metals was first demonstrated in 1934 by Hume-Rothery and his co-workers. They studied solid solutions of various metals in both copper and silver and were able to state the following general principle If the atomic diameters of the solvent and solute differ by more than about 14 per cent, of that of the solvent, the size-factor is unfavourable and the solid solution is very restricted, whilst when the atomic diameters are within this limit the size-factor is favourable, and considerable solid solutions may be formed. These workers decided to use the interatomic distances, which are characteristic of the metals concerned, as indicators of the respective atomic diameters, although they found that the figures required minor corrections in certain cases, as, for example, in the case of metals like aluminium, which appeared to be incompletely ionised in crystals of the pure metal. 

The atomic 8u rangements and bonds of the gold-silver ditellurides. Acta Cryst. 5 (1952) 375—381. (George Tunell and Linus Pauling). Interatomic distances and atomic valences in NaZnia. Acta Cryst. 5 (1952) 637—644. (David P. Shoemaker, Richard E. Marsh, Fred J. Ewing, and Linus Pauling). SP 54 ... 

Fourth, when carrier-free silver in a nitrate or perchlorate medium failed to follow the writer s predictions (instead depositing several tenths of a volt more readily than expected(10.11)). other experimental variables had to be examined. The Oak Ridge studies were continued at M. I. T. on silver, by Byrne (12-14, and on copper, by DeGeiso (15). The latter paper summarized the evidence for using interatomic distances in the substrate and in the deposit as a basis for making rough estimates of the magnitude of the underpotential - or its probable absence. ... 

In the Gurney-Mott mechanism, the trapped electron exerts a coulombic attraction for the interstitial silver ion. This attraction would be limited to a short distance by the high dielectric constant of the silver bromide. Slifkin (1) estimated that the electrostatic potential of a unit point charge in silver bromide falls to within the thermal noise level at a distance of "some 15 interatomic spacings." The maximum charge on the sulfide nucleus would be 1 e. The charge on a positive kink or jog site after capture of an electron would not exceed e/2. An AgJ would have to diffuse to within the attraction range before coulombic forces could become a factor. 

The closest contact between the strands of the chain is AgT -Ag2 at a distance of 2.89 A, which is equal to the interatomic separation in silver metal. However, my interpretation of this contact is that it represents the onset of a repulsive interaction between the silver atoms. In this structure the linear geometry at silver indicates that its bonding is fulfilled by the two thiolates, and there is no requirement for secondary Ag S bonding. The slight bending of Agl and Ag2 outside their S - S lines, away from each other, is indicative of weak repulsion, not attraction, between them. It is believed that the two zigzag strands of the chain approach each other until limited by the internal repulsion between opposite silver atoms. A corollary of this interpretation is a strong... 

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