Amplitude of the charge-density waves in 1T- and 2H-TaSe2

Mössbauer Ta181 spectra of 1T-TaSe2 at 300 K show only two of three Ta sites predicted by 6:6:1 charge-density-wave models. They have equal amplitude and are separated by a shift the authors calibrate as 0.34(0.17) electrons. The unseen site is experimentally excluded from the region between Ta4+ and Ta5+. Site linewidths limit possible secondary splittings by interlayer effects to 0.018 of the primary splitting. The 2H-TaSe2 data at 52 K are consistent with an orthorhombic charge-density wave with three equal Ta sites at -0.049(0.020), +0.033(0.016), and +0.023(0.011) electrons relative to Ta4+.