Thermal Expansion of Fedotovite K2Cu3O(SO4)(3) and Piypite K4Cu4O(SO4)(4)& BULL;(Na,Cu)Cl

This paper presents the results of a study of the thermal behavior of fedotovite K2Cu3O(SO4)(3) and piypite K4Cu4O(SO4)(4)& BULL;(Na,Cu)Cl minerals in a wide temperature range. The crystal structure of the holotype piypite specimen is refined at room temperature. The mechanisms of thermal expansion of minerals depending on the crystal structure are described.

Automated summary

This paper presents the results of a study on the thermal behavior of fedotovite K2Cu3O(SO4)(3) and piypite K4Cu4O(SO4)(4)& BULL;(Na,Cu)Cl minerals in a wide temperature range. The crystal structure of the holotype piypite specimen is refined at room temperature. It describes the mechanisms of thermal expansion of minerals depending on the crystal structure.