They consist of a mixture of primordial pre-planetary components including chondrules and calcium-aluminium-rich inclusions (CAIs) set within a matrix of fine-grained (1 μm) materials and an amorphous ...

At 77 K, amorphous ice changes from its low-density to high-density polyamorph under pressure in a first-order transformation 4. Other network glasses such as common silicates undergo polyamorphic ...