Chirality-asymmetry force between ɑ-quartz and copper block

The chirality-asymmetry macroscopic force mediated by light pseudoscalar particles between $\alpha $-quartz and some achiral matter is studied. If this force between achiral source mass and $\alpha $-quartz with some chirality is attractive, it will become repulsive when the chirality of the $\alpha $-quartz crystal is changed. According to the tested limits of the coupling constant $g_{\rm s} g_{\rm p} / \hbar c < 1.5\times 10^{ - 24}$ at the Compton wavelength $\lambda = 10^{ - 3}$\,m, the force ($F$) between a $0.08\times 0.08\times 0.002$\,m$^{3}$ block of $\alpha $-quartz and a $0.08\times 0.08\times 0.01$\,m$^{3}$ copper block with a separation being $0.5\times 10^{ - 3}\,\mbox{m}$ in between, is estimated from the published data at less than $4.64\times 10^{ - 24}\,\mbox{N}$, i.e. $F < 4.64\times 10^{ - 24}\,\mbox{N}$.