Materials (cement stone samples) in the CaO-K2O-SO3-H2O system with target phase compositions, including syngenite K2Ca(SO4)2·H2O and calcium sulfate dihydrate CaSO4·2H2O, were prepared from powder mixtures of anhydrite CaSO4, and/or calciolangbeinite K2Ca2(SO4)3, potassium K2SO4 via hydration reactions at a water/powder ratio within an interval 0.5–0.9. It was revealed that samples contents 25...

The purpose of this study was the dosimetric evaluation of thermoluminescent detectors of calcium sulphate doped with dysprosium (CaSO4:Dy) produced by IPEN compared to the TL response of lithium fluoride doped with magnesium and titanium (LiF:Mg,Ti) dosimeters and microdosimeters produced by Harshaw Chemical Company to clinical photon beams dosimetry (6 and 15 MV) using liquid water and PMMA p...

Human demand for energy has reached unprecedented levels. A high-efficiency chemical heat pump (CHP) that uses solar thermal as source called SCHP system been studied decades in our laboratory. The (SCHP) using CaSO4∙1/2H2O/CaSO4 can store the form of and release it hot cold heat. This study presents a simplified three-dimensional unsteady model reactant bed releasing step system. is programmed...

MIL03346 meteorite: It is a martian meteorite (nakhlite) collected from Miller Range, Antarctica. It contains variety of hydrous Caand Fe 3+ -sulfates, and other H2O/OH-bearing species, thus has been extensively studied, with a purpose to build the links to aqueous alteration processes on Mars [4-9]. The martian origin of Ca-sulfates and jarosites in MIL 03346 is validated by the finding of the...