Table 1. Comparison of Cell Parameters of Different Forms of Cowlesite, Measured by 3D ED and PXRD Respectively.

	dehydrated, RT vacuum	frozen-hydrated, –173 °C	pristine, RT	dehydrated, 165 °C	dehydrated, RT after 1 month
method	3D ED	3D ED	PXRD	PXRD	PXRD
a/Å	23.0(5)	23.0(5)	23.116(8)	23.16(1)	23.18(1)
b/Å	24.4(5)	24.8(5)	24.891(7)	24.77(1)	24.88(2)
c/Å	25.4(5)	30.1(6)	30.468(2)	25.586(3)	26.397(6)
V/Å3	14254(510)	17169(613)	17532(8)	14677(9)	15223(14)