Multiple forms often nucleated in a single experiment — at least one calcite crystal formed on top of an aragonite crystal while
vaterite crystals grew nearby.
Not exact matches
So why do these species produce a calcium carbonate
crystal crust and why are some crusts calcite and others
vaterite?
Without the polymer, they saw
crystals of
vaterite and a little calcite forming randomly under the microscope.
All of the common
crystal forms, including calcite (found in limestone), aragonite (found in mother - of - pearl), and
vaterite (found in gallstones), crystallized from solution, often at the same time.