title: Handbook of Lithium and Natural Calcium Chloride
author:  Donald E. Garrett 
description: "...a useful reference for anybody wanting to understand more about the properties, occurrences, geology and processing of both calcium chloride and lithium. In particular, the book would be of interest to anybody wishing to understand how physical properties, geology and processing all influence each other. The book also comes with a lengthy reference section." --<b><i>Industrial Minerals</i> (May 2005)</b>
zlib_text: MAGNESIUM
  Magnesium occurs in seawater and in ores such as dolomite (CaCO3.MgCO3),
  magnesite (MgCO3), and carnallite (MgCl2.KCl.6H2O).
  Magnesium can be made by several methods (Fig. 1), but the most com-
  mon method of manufacture is by the electrolytic process, as for example
  the electrolysis of magnesium chloride.
  The magnesium chloride is obtained from saline solution, from brine,
  and from the reaction of magnesium hydroxide (from seawater or
  dolomite) with hydrochloric acid (Fig. 2). Electrolyzing magnesium
  chloride from seawater, using oyster shells for the lime needed is also an
  option. The oyster shells, which are almost pure calcium carbonate, are
  burned to lime, slaked, and mixed with the seawater, thus precipitating
  magnesium hydroxide. This magnesium hydroxide is filtered off and
  treated with hydrochloric acid prepared from the chlorine evolved by the
  cells to form magnesium chloride solution that is evaporated to solid
  magnesium chloride in direct-fired evaporators, followed