protodolomite

protodolomite

[¦prōd·ō′dō·lə‚mīt]
(mineralogy)
A crystalline calcium-magnesium carbonate with a disordered lattice in which the metallic ions occur in the same crystallographic layers instead of in alternate layers as in the dolomite mineral.
References in periodicals archive ?
Examples include the well-known kinetic inhibition of dolomite formation from seawater, and the formation of 'protodolomite' rather than dolomite from evaporated groundwater or seawater (e.g., Machel and Mountjoy, 1986; Usdowski, 1994).
The Mg carbonate precipitated, combined with calcite precipitation, will likely represent the mixed Ca-Mg precipitate, called protodolomite, that is observed in hypersaline environments.
(1956) Some hydrothermal syntheses of dolomite and protodolomite. Journal of Geology, 64, 173.