It's a metastable state at best, all too likely to collapse into tyranny.
At any point outside this area, monoclinic sulphur can exist only in a metastable condition.
Presence of silicon tends to prevent, presence of manganese tends to assist, the production of the metastable systems.
This law explains the formation of the metastable forms of monotropic substances, which would otherwise not be obtainable.
Two of these solutions, however, would be metastable and supersaturated with respect to the decahydrate.
A considerable number of such cases have, indeed, been found, and in some cases there is more than one metastable hydrate.
To this fact van't Hoff attributes the great permanence of many really unstable (or metastable) carbon compounds.
The realization of the metastable melting point of the hexahydrate is, therefore, due to suspended transformation.