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Abstract—This paper reports the synthesis of double K–Ca carbonates at atmospheric pressure in closed graphite capsules. The mixtures of K2CO3 and CaCO3 corresponding to the stoichiometry K2Ca(CO3)2 and K2Ca2(CO3)3 were used as starting materials. The low-temperature modification of K2Ca(CO3)2 was synthesized by a solid-state reaction at 500°C during 96 h. The high-temperature modification of K2Ca(CO...
We determine cluster mass fraction fc in supersonic gas jets by measuring femtosecond evolution of the jet's refractive index by single-shot frequency domain holography. Variations of fc with time, position and backing pressure are measured.
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