Approximately,
\[
\begin{alignedat}{4}
A^\prime_{\mathbf{7c}}&{}\approx{}&1.000000000000&{}:{}&-1.366025403784&{}:{}&1.366025403784&,\\B^\prime_{\mathbf{7c}}&{}\approx{}&-1.366025403784&{}:{}&1.000000000000&{}:{}&1.366025403784&,\\C^\prime_{\mathbf{7c}}&{}\approx{}&-0.032692070451&{}:{}&-0.032692070451&{}:{}&1.065384140902&,
\\
A^{\prime\prime}_{\mathbf{7c}}&{}\approx{}&-0.063855924532&{}:{}&-0.008555071705&{}:{}&1.072410996238&,\\B^{\prime\prime}_{\mathbf{7c}}&{}\approx{}&-0.008555071705&{}:{}&-0.063855924532&{}:{}&1.072410996238&,\\C^{\prime\prime}_{\mathbf{7c}}&{}\approx{}&-0.183012701892&{}:{}&-0.183012701892&{}:{}&1.366025403784&,
\\
A^{\prime\prime\prime}_{\mathbf{7c}}&{}\approx{}&-0.030940107676&{}:{}&0.022649730810&{}:{}&1.008290376865&,\\B^{\prime\prime\prime}_{\mathbf{7c}}&{}\approx{}&0.022649730810&{}:{}&-0.030940107676&{}:{}&1.008290376865&,\\C^{\prime\prime\prime}_{\mathbf{7c}}&{}\approx{}&0.297086290221&{}:{}&0.297086290221&{}:{}&0.405827419558&,
\\
A^*_{\mathbf{7c}}&{}\approx{}&0.000000000000&{}:{}&0.133974596216&{}:{}&0.866025403784&,\\B^*_{\mathbf{7c}}&{}\approx{}&0.133974596216&{}:{}&0.000000000000&{}:{}&0.866025403784&,\\C^*_{\mathbf{7c}}&{}\approx{}&0.500000000000&{}:{}&0.500000000000&{}:{}&0.000000000000&.
\end{alignedat}
\]