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An Old Dog with New Tricks – Additions to the Cesium Lithium Chloride System: Cs 3 Li 2 Cl 5 and the Hydrated Cs 3 LiCl 4 ·4H 2 O
Author(s) -
Ortner Teresa S.,
Scheifers Jan P.,
Flores Justin,
Zhang Yuemei,
Iyer Abishek K.,
Gesing Thorsten M.,
Fokwa Boniface P. T.
Publication year - 2019
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201900774
Subject(s) - chemistry , caesium , lithium (medication) , chloride , inorganic chemistry , radiochemistry , lithium chloride , organic chemistry , medicine , endocrinology
The CsCl/LiCl system has been studied for over a century now. Numerous phases have been predicted – only three have hitherto been found. We present the synthesis and single‐crystal structure of the cesium lithium pentachloride Cs 3 Li 2 Cl 5 , predicted earlier but with a different structure. The anhydrous new phase readily reacts to Cs 3 LiCl 4 · 4H 2 O in air. The tetrahydrate can also be obtained through the simplest, most inexpensive and green synthesis possible: an immediate, room‐temperature mechanosynthesis from only CsCl and LiCl (3:1) in air. Differential scanning calorimetry (DSC) and thermogravimetric analyses (TGA), as well as in situ temperature‐dependent powder X‐ray diffraction studies on this second ever reported ternary alkali chloride hydrate allowed for a revision of the CsCl/LiCl phase diagram. Density of states and total energy calculations further elucidate the new alkali chlorides and update the relative stability of previous structure predictions.