Synthesis and characterization of newberyite

Phosphates belong to the extensive group of inorganic pigments that are very often used in industry of plastics and anticorrosive paints. Also, the powders of newberyite MgHPO₄·3H₂O and α-pyrophosphate Mg₂P₂O₇ can find the usage in this field. Thus, these compounds were the centre of our attention. Newberyite and α-pyrophosphate were synthesized by the method of gelling. Impact of various ways of synthesis, especially reaction conditions, on the structural, thermal, physical and optical properties was investigated. α-pyrophosphate was synthesized by the thermal decomposition of newberyite at temperature around 500°C. Both powders are white color, but the newberyite is the whitest one. The reaction pH particularly affected the particle size distribution and optical properties.