calcite


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  • noun

Words related to calcite

a common mineral consisting of crystallized calcium carbonate

References in periodicals archive ?
Dr Uwe Balthasar, Lecturer in Palaeontology, first published research exploring the dominance of aragonite and calcite in the marine environment in 2015.
The production of calcite will allow to completely abandon imports, and produce various types of domestic paints, drywall and other non-metallic building materials domestically.
But in the future, it will invade the deep-ocean, spread above the ocean floor and cause even more calcite particles at the seafloor to dissolve," said lead author Olivier Sulpis.
The produced carbonate ions are precipitated as calcite crystals in the presence of calcium ions.
Moreover, bacterial strains must be proficient in production of copious amount of calcite, which is responsible for crack healings [34].
At every measurement point in Runs A-C, crystal planes of both calcite and aragonite started to grow immediately after the start of experiments.
The inorganic constituents described [6] are: (i) calcite of foraminifera shells and fine-grained matrix, (ii) authigenic quartz filling the chambers of some foraminifera, composing tests of siliceous algae (supposed), and very limited detrital quartz, (iii) phosphate in pellets, intraclasts, bone, teeth, and coprolites of carbonate fluorapatite, clay minerals thought to be detrital in origin, (iv) pyrite as filling the chambers of shells and voids.
The eight specimens of calcite on display at NIH, each vastly different from the next, are just a hint at its importance for many different applications: its main component is calcium, one of the most abundant minerals in the world--as well as in the human body.
We argue that calcite prism growth in euheterodonts is dominated by abiotic constraints whereas, in pteriomorphs (such as oysters, pterioids, and mussels), it is under strong biological control.
The coexistence of the acidic proteins and magnesium dramatically changed the morphology of the calcite polymorph of calcium carbonate to create crystals exposing predominantly {hk0} faces, whereas {104} was dominant without either one of the components (Figure 1).
The Olympus BH@ BHSP polarizing microscope equipped with Nikon digital camera was used to characterize the mineralogical, texture, cementing material and grain features (grain size of calcite and dolomite in relation to boundary shapes).Light Optical Microscopy (L.O.M.) was also performed on 30um, polished thin sections to analyze the grain size, colour and texture of samples.
It is generally accepted that the preservation conditions of calcitic belemnite rostra, which are distinguished by their original low-magnesium calcite composition, makes them relatively stable and resistant to diagenetic alteration (Veizer, 1974; Sslen, 1989; Podhala et al., 1998; Rosales et al., 2001, Richter et al., 2011, and references therein).
By using Ordovician carbonatite rocks and paleokarst fissure/cave-filling calcite as study subjects in addition to carbon-oxygen and strontium isotopes and trace element techniques, this study attempts to examine the development of paleokarst reservoirs and the larger paleoenvironment to provide geochemical evidence for the exploration and development of karst reservoirs.
A few years ago, I was invited to participate in an expedition aboard the research vessel Roger Revelle to the Southern Ocean, where WHOI marine chemist Phoebe Lam and colleagues were investigating a phenomenon known as the Great Calcite Belt.