Orientations and twinning in the structural transformation aragonite-type to calcite-like in potassium nitrate crystals

Structural relationships between the polymorphs of silver nitrate

“…This has been shown experimentally by the mode of conversion of TINO 3 III to the RbNO 3 III structure (Kennedy & Patterson, 1965); and especially of cubic RbNO 3 III to the NaNO3-1ike RbNO 3 II, in which the planes of the anions are quite differently oriented (Kennedy & Kriven, 1976). KNO3 II also transforms to the high-NaNO 3 structure in nonrandom though complex ways (Kennedy & Kriven, 1972;Kennedy & Odlyha, 1977).…”