The data in this folder are from this publication:

2011	Yu, X. and Hofmeister A.M., Thermal diffusivity of alkali and silver halides. Journal of Applied Physics J. Appl. Phys. 109, locator number 033516

Keywords: Laser-flash method, high-temperature, thermal diffusivity, alkali halides, silver halides, damped harmonic oscillator model, thermal expansivity

Data collected at Washington University, St. Louis, MO.  The tables represent all thermal data collected.  

This publication was supported by NSF Grant Nos. EAR-071120 and EAR-075784.

Files of all tables are in excell. The contents are:

Table 1. Samples, run conditions and fits to thermal diffusivity at elevated temperature.
Table 2. Physical properties of alkali halide at 298 K.
Table 3. Second order best fit through 0, 0 from LFA studies.

The xxxx.prn files are ascii files of the spectral data of the samples listed in table 1. These are not baseline corrected; 
Format is the left column is in wavenumbers and the right column is in absorbance units (base 10).  Some unpublished data is included. 

Some additional excell files are included: these are thermal diffusivity data. 

Abstract:
The phonon component of thermal diffusivity D for ten synthetic single-crystals LiF, NaCl, NaI,
NaI:Tl, KCl, KBr, CsI, CsI:Tl, AgCl, and AgBr with the B1 and B2 structures was measured from
ambient temperature T up to 1093 K using contact-free, laser-flash analysis, from which effects
of ballistic radiative transfer were removed. We investigated optical flats from different
manufacturers as well as pellets made from compressed powders of most of the above chemical
compositions plus LiI, NaBr, KI, RbCl, RbBr, RbI, CsCl, CsBr, and AgI. Impurities were
characterized using various spectroscopic methods. With increasing T,D decreases such that near
melting the derivatives D/T are low, −0.00060.0004 mm2 s−1 K−1. Our results are 16%
lower than D298 previously obtained with contact methods, which are elevated by ballistic radiative
transfer for these infrared IR windows, and are well described by either D−1 following a low order
polynomial in T, or by D−1T+n, where n ranges from 1.0294 to 1.9429. Inverse correlations were
found between D298 and both density and thermal expansivity . Primitive lattice constant times
compressional velocity correlates directly with D but changes much more slowly with temperature.
Instead, DT is proportional to TL−1 from 0 K up to the limit of measurements, in accord with
these physical properties being anharmonic. On average, the damped harmonic oscillator–phonon
gas model reproduces D298 based on two physical properties: compressional velocity and the
damping coefficient  from analysis of IR reflectivity data. Given large uncertainties in T,
D−1T is reproduced for LiF, NaCl, MgO, and the silver halides, for which IR reflectivity data are
available. Our correlations show that optical phonons largely govern heat transport of insulators, and
permit prediction of D and thus thermal conductivity for simple, diatomic solids. © 2011 American
Institute of Physics. doi:10.1063/1.3544444