Table 1. Maximum anhydrous proton conductivity, σ_max, and the activation energy, E_a, of the single-crystalline samples of 1A for each crystallographic direction.

	//a	//b	//c
σ max (S cm−1)	8.56 × 10−6 [370.1 K]	1.82 × 10−5 [370.2 K]	9.43 × 10−6 [370.2 K]
E a (eV)	1.87(18) [325.4–340.9 K]	1.77(8) [324.3–339.7 K]	2.05(17) [325.3–340.8 K]
	3.40(13) [343.9–370.1 K]	3.39(9) [345.9–370.2 K]	3.71(15) [343.9–370.2 K]