A new magnesium-borate double salt which was nominated as chloropinnoi
te was synthesized and the phase interaction with water at 47815 K and
55315 K studied. The results suggest that certain pure magnesium-bora
tes can be synthesized from chloropinnoite-water system under differen
t conditions, and the physico-chemical data of these berates can be ob
tained. (C) 1998 Published by Elsevier Science B.V.