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Calcium Hydroxide Chlorides: The Ternary System Ca(OH) 2 ‐CaCl 2 ‐H 2 O at 25, 40, and 60 °C, Phase Stoichiometry and Crystal Structure
Author(s) -
Häusler Felix,
Schmidt Horst,
Freyer Daniela
Publication year - 2019
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201900051
Subject(s) - calcium hydroxide , anhydrous , ternary operation , hydrate , solubility , crystal structure , hydroxide , inorganic chemistry , stoichiometry , chemistry , phase (matter) , crystal (programming language) , ternary numeral system , materials science , crystallography , organic chemistry , computer science , programming language
The formation of calcium hydroxide chlorides is an important issue in processes of the chemical raw materials industry, in terms of purification of flue gases, and concrete/cement corrosion. Current information on phase compositions given in the literature are contradictory. In this work systematic solubility studies were carried out at 25, 40, and 60 °C in the system Ca(OH) 2 ‐CaCl 2 ‐H 2 O and the compositions of the ternary solid phases were precisely determined using the Schreinemakers' method. Two ternary phases were identified, the hydrate 3Ca(OH) 2 · CaCl 2 · 12H 2 O and the anhydrous calcium hydroxide chloride Ca(OH) 2 · CaCl 2 . The crystal structure of 3Ca(OH) 2 · CaCl 2 · 12H 2 O was solved by means of single‐crystal X‐ray diffraction at –123 °C (150 K).