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زمینشناسی و معدن::
میدان پایداری
If conditions deviate from the 'stability field' of one species, another species which is stable in the new environment will preferentially crystallize out.
Once formed, a species remains stable so long as the environment remains within its stability field.
The rarest minerals are characterized by the most restricted stability fields; the more common minerals tend to form in^a-broad^ range of geological environments encompassing a wide range of temperature, pressure and chemical parameters.
The high temperature limit to the stability field of most hydrated mineral species is defined by the intersection of the mineral-lower hydrate phase boundary with the mineral-solution phase boundary,
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