Origin of aragoniteafter Aragon, in Spain
a semihard, orthorhombic mineral resembling calcite, made up of calcium carbonate, CaCO: it is found in sedimentary and metamorphic rocks and in the skeletons of marine organisms
An orthorhombic mineral form of crystalline calcium carbonate, dimorphic with calcite.
Origin of aragoniteAfter Aragon
(countable and uncountable, plural aragonites)
- Gypsum, celestine, aragonite and calcite.
- Calcium carbonate separates as hexagonal calcite from cold solutions (below 30°), and as rhombic aragonite from solutions at higher temperatures; lead and strontium carbonates, however, induce the separation of aragonite at lower temperatures.
- Are included sulphur and ammonium nitrate; monotropy is exhibited by aragonite and calcite.
- Thus the sulphate constitutes the minerals anhydrite, alabaster, gypsum, and selenite; the carbonate occurs dissolved in most natural waters and as the minerals chalk, marble, calcite, aragonite; also in the double carbonates such as dolomite, bromlite, barytocalcite; the fluoride as fluorspar; the fluophosphate constitutes the mineral apatite; while all the more important mineral silicates contain a proportion of this element.
- Calcium carbonate, CaCO 3, is of exceptionally wide distribution in both the mineral and animal kingdoms. It constitutes the bulk of the chalk deposits and limestone rocks; it forms over one-half of the mineral dolomite and the rock magnesium limestone; it occurs also as the dimorphous minerals aragonite (q.v.) and calcite (q.v.).