TY - JOUR
T1 - Inelastic neutron scattering from the quasi-one-dimensional conductor K1.75[Pt(CN)4]·1.5H2O
AU - Carneiro, K.
AU - Eckert, J.
AU - Shirane, G.
AU - Williams, Jack M.
N1 - Funding Information:
RECENTLY, independent neutron 1 and X-ray 2 diffraction studies have determined the structure of the potas- sinm deficient partially oxidized platinum salt Kl.~s \[Pt(CN)4\]• 1.5H=O, hereafter K(de0TCP. Of particular interest from this work is that the equally spaced Pt atoms form nearly linear chains, suggesting that K(de0TCP is a one-dimensional conductor. This conclusion is consistent with the results of d.c.-resistivity measurements 8 and polarized specular reflectance data, 4 both showing characteristic one-dimensional behaviour. The strong current interest in such materials together with the possibility of comparing the results to the well studied similar compound K= \[Pt(CN)4\]B ro.3" 3.2D=O, KCP(Br), 5 motivated us to study this new material by means of neutron scattering. In this letter we report the first results of inelastic neutron scattering, which confirm the expectation that KI.~ \[Pt( CN)4\] • 1.5H20 is an interesting new example of a quasi-one-dimensional conductor. There are several features of its structure at room temperature which complicates the study of K(de0TCP. As mentioned the Pt-chains form non-linear bond-angles at every other Pt \[the Pt(l)-Pt (2)-Pt(3) bond angle is 173.25 ° \]. 1 The Pt-Pt distance is 2.96 A which is appreciably larger than most other partially oxidized Pt-salts \[e.g. 2.88 A in KCP(Br)\]. Also since the interchain distance is smaller than in KCP(Br) one might expect a decreased electrical anisotropy. On the other hand, the * Work performed under the auspices of the U.S. Energy Research and Development Administration.
PY - 1976/10
Y1 - 1976/10
N2 - Neutron inelastic scattering has been used to study the longitudinal and one of the transverse acoustic phonons, propagating along the [001]* direction in triclinic K1.75[Pt(CN)4]·1.5H2O. This material appears to be a quasi-one-dimensional conductor, with a commensurate distortion. We observe a reasonably well defined Kohn anomaly, which shows little temperature dependence between 80 and 300 K.
AB - Neutron inelastic scattering has been used to study the longitudinal and one of the transverse acoustic phonons, propagating along the [001]* direction in triclinic K1.75[Pt(CN)4]·1.5H2O. This material appears to be a quasi-one-dimensional conductor, with a commensurate distortion. We observe a reasonably well defined Kohn anomaly, which shows little temperature dependence between 80 and 300 K.
UR - http://www.scopus.com/inward/record.url?scp=33847324565&partnerID=8YFLogxK
U2 - 10.1016/0038-1098(76)90519-6
DO - 10.1016/0038-1098(76)90519-6
M3 - Article
AN - SCOPUS:33847324565
SN - 0038-1098
VL - 20
SP - 333
EP - 336
JO - Solid State Communications
JF - Solid State Communications
IS - 4
ER -