Growth habit of the basic oxysulfate magnesium whisker

Abstract

The growth habit of the basic magnesium oxysulfate whisker was investigated based on the theoretical model of anion coordination polyhedron growth units. It is found that typical basic magnesium oxysulfate whisker growth is consistent with anion tetrahedral coordination incorporation rules. The growth units of basic magnesium oxysulfate whiskers are [Mg-(OH)₄]²⁻ and HSO₄ ⁻. [Mg-(OH)₄]²⁻ is the favorable growth unit and whisker growth is in the direction of the [Mg-(OH)₄]²⁻ combination. A plurality of [Mg-(OH)₄]²⁻ s combine and become a larger dimensional growth unit in a one-dimensional direction. Then HSO₄ ⁻ and larger dimensional growth units connect as basic magnesium sulfate whiskers, according to the structural characteristics of the basic magnesium sulfate whisker, which can guide the synthesis of magnesium hydroxide whisker.

Keywords

model of anion coordination polyhedron growth units / basic magnesium oxysulfate whisker / growth habit / crystal morphology

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