RECENTLY Powell 1 directed attention to the fact that for calcium sulphate hemihydrate the rate of transition of soluble anhydrite to insoluble anhydrite was greater in the α- than in the β-form.

This material included a lot of sulphur-containing minerals such as gypsum and anhydrite, but also carbonates which yielded carbon dioxide. The team's calculations estimate the quantities ejected ...

Evaporite Karst and Caves of Northern Apennines constitute the most complete, outstanding and accessible examples of the karst phenomena in gypsum and anhydrite at humid sub-tropical climate ...

t k = O 005401—0'000005.t J- Rock salt 3-161 c = 0'2146 + 0 00017t k = 0'0137 1 — 0'0044t - Anhydrite of Jura 2'892 c = 0'1802 + 0 0003.t. k = 0 0133 1 — 0^0024.t - Quartz 3'638 c = 0'1754 ...