The formula of carnallite is: (a) \( \mathrm{LiAl}\left(\mathrm{Si}_{2} \mathrm{O}_{5}\right)_{2...

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The formula of carnallite is:
(a) \( \mathrm{LiAl}\left(\mathrm{Si}_{2} \mathrm{O}_{5}\right)_{2} \)
(b) \( \mathrm{KCl} \cdot \mathrm{MgCl}_{2} \cdot 6 \mathrm{H}_{2} \mathrm{O} \)
(c) \( \mathrm{K}_{2} \mathrm{O} \cdot \mathrm{Al}_{2} \mathrm{O}_{3} \cdot 6 \mathrm{SiO}_{2} \)
(d) \( \mathrm{KCl} \cdot \mathrm{MgCl}_{2} \cdot 2 \mathrm{H}_{2} \mathrm{O} \)
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