calcite


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Words related to calcite

a common mineral consisting of crystallized calcium carbonate

References in periodicals archive ?
The presence of calcite, dolomite, silica (quartz, tridymite, cristobalite), apatite, clay minerals (smectite and smectite-illite) and rare sulfides in the matrix of natural OS, as well as in the IR of natural oil shale and burning test ash is interpreted from the results of XRD and SEM-EDS analyses.
Caption: Sulphur with calcite (Sicily) is utilized in pharmaceutical preparations for the treatment of acne and other skin conditions.
Continuous layers (as opposed to isolated patches) of calcite are found in two major clades of bivalves: the pteriomorphs and the euheterodonts.
Calcite was found to be the main mineral (>75%) with a smallvariationof 1-2% in different samples.
2011, Benito and Reolid, 2012) include the presence of concentric growth layers or rings; a radial fabric of prismatic calcite crystals that emerge from the apical line and thicken towards the external wall of the rostra; and the crystals' internal micro-fibrous texture, enhanced after etching in 25% glutardialdehyde and in other diluted acids (Sslen, 1989), which more or less perpendicularly traverses the concentric growth pattern.
In the analysis of carbon and oxygen isotopes, nine samples of the Ordovician bedrock drilling core and 45 samples of the paleokarst cave-filling calcite were used.
Scientists hypothesize that these high calcite concentrations are produced by massive blooms of algae spanning the Southern Ocean.
The ambient condition also caused recarbonation of pyrogenic fcc CaO to form atmospheric aragonite and atmospheric calcite by C[O.
Potters supply the clay from Vranjani village, calcite from Rupeljevo village and mix them to prepare the batch.
Carbonate minerals such as calcite, dolomite and aragonite have similar optical properties and distinguishing them is often difficult.
In this case, blue indicates dolomite, green indicates calcite and fuchsia indicates the presence of what appears to be an organic dye.
In the Western coals, calcite (CaCO3) prevents iron from becoming bioavailable and limits endogenous iron to interact with quartz, resulting in reduced toxicity of the coal dust.
Even when the sun is hidden behind clouds or just below the horizon, it is possible to pinpoint its location by detecting the polarization of light Scientists have thought that Vikings' sunstones may have been made of a kind of calcite crystal called Iceland spar, which is "birefringent," meaning that it splits the light that enters it and produces a double image.