Amphibole synthesis at low pressure: what grows and what doesn't

Despite a considerable number of experiment studies on amphibole stability and end-member synthesis, until recently few synthetic amphiboles have been adequately characterized by modern methods. This study is a reconnaissance of iron-free, monoclinic amphibole synthesis possibilities over a wide range of compositions, to see what can and what cannot be synthesized at low pressures. Synthesis results of end-member and intermediate amphibole compositions from the calcic, sodic-calcic and sodic groups are described