Alkali halide

NaCl

12.20˚ ± 1.72˚

16.56˚ ± 2.36˚

KCl

16.21˚ ± 2.30˚

18.29˚ ± 3.13˚

KBr

12.98˚ ± 1.52˚

13.25˚ ± 2.28˚