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Thermal Behaviour, Crystal Structures, Modifications Using the high temperature Guinier technique the transformation of the room temperature form N-PbSO 4  to the cubic high-temperature form H-PbSO 4  was observed. The nonquenchable H-PbSO 4  modification crystallizes in the α-NaClO 4 -type with a( 900 °) = 7,23 Å, Z = 4 and d X-ray  (900 °C) = 5,33 g/cm 3  . The thermal dilatation of N-and H-PbSO 4  was measured.

zeitschrift für naturforschung b

Beiträge zum thermischen Verhalten von Sulfaten, IV* Neues zum Verhalten von PbSO 4  bei höherer Temperatur / Contributions to the Thermal Behaviour of Sulfates, IV* New Facts About the Behaviour of PbSO 4  at Higher Temperature