[3] In terms of optics, properties include phosphorescence, photocatalysis,[4] laser damage threshold, refractive index, birefringence, absorption particularly in the ultraviolet or near infrared, non-linearity.
For electrical properties, electric conductivity, band gap, superconducting transition temperature piezoelectricity, pyroelectricity, ferromagnetism, dielectric constant, charge-density wave transition can be adjusted.
Many of the non-metals that could make mixed-anion compounds may have greatly varying volatilities.
High pressure can result in different crystal forms, perhaps with higher coordination number.
Examples include the iodate periodates,[10] sulfite sulfates, selenate selenites, tellurite tellurates, nitrate nitrites, phosphate phosphites, and arsenate arsenites.