Compound	$σ_{i s o}^{P B E}$	$σ_{i s o}^{B J}$	$σ_{i s o}^{m B J}$	$δ_{i s o}^{P B E}$	$δ_{i s o}^{B J}$	$δ_{i s o}^{m B J}$	$δ_{i s o}^{e x p}$
TaCu₃S₄	−595.58	−592.62	135.1	2306.4	2600.78	2816.7	2740
TaCu₃Se₄	−1795.83	−1846.2	−1020.43	3506.65	3854.36	3972.23	3730
TaCu₃Te₄	−3806.1	−3898.29	−2951.62	5516.92	5906.45	5903.42	5720
TaTl₃S₄	−1955.02	−1785.34	−1110.76	3665.84	3793.5	4062.56	4070
TaTl₃Se₄	−3259.78	−3103.26	−2383.26	4970.6	5111.42	5335.06	5210
KTaO₃	1710.82	2008.16	2951.8	0	0	0	---