[T. Demediuk, W. F. Cole, H. V. Hueber (1955): "Studies on magnesium and calcium oxychlorides". ''Australian Journal of Chemistry'', volume 8, issue 2, pages 215-233. {{doi|10.1071/CH9550215}}]
"The reactions which take place in the system MgO-MgCl2-H2O at
concentrations of MgCl2 solutions up to 45 per cent. and
temperatures from 0 to 110 °C have been studied in detail. Four
oxychlorides have been found, namely, 9Mg(OH)2.MgCl2.5H2O,
5Mg(OH)2.MgCl2.8H2O, 3Mg(OH)2.MgCl2.8H2O, and 2Mg(OH)2.MgCl2.4H2O ;
and an equilibrium diagram has been produced which gives the
conditions at which each is stable. It is probable that in the
formation of the oxychlorides a complex ion forms first and this
reacts with Mg(OH)2, formed by rapid hydration of MgO, to produce
amorphous oxychloride gels which slowly crystallize. The reactions
in the systems MgO-CaCl2-H2O, CaO-MgCl2-H2O, Ca(OH)2-MgCl2-H2O,
CaO-CaCl2-H2O, Ca(OH)2-CaCl2-H2O, and between calcined dolomite and
MgCl2, or CaCl2. solutions have been studied briefly. Oxychlorides
form in these reactions also. It is therefore suggested that the
explanation for the success of the method of Demediuk (1952) for the
removal of " unsoundness " of dolomitic limes, and other limes high
in magnesium oxide, by the action of salt solutions lies in the
conversion of free magnesium oxide to magnesium oxychlorides. The
optical properties and stabilities of the magnesium oxychlorides are
briefly discussed."
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