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Calc-sinter :: Calc-sinter (n.) See under Calcite.

Nitro- :: Nitro- () A combining form (used also adjectively) designating certain compounds of nitrogen or of its acids, as nitrohydrochloric, nitrocalcite; also, designating the group or radical NO2, or its compounds, as nitrobenzene..

Dimorphism :: Dimorphism (n.) Crystallization in two independent forms of the same chemical compound, as of calcium carbonate as calcite and aragonite..

Bergmeal :: Bergmeal (n.) An earthy substance, resembling fine flour. It is composed of the shells of infusoria, and in Lapland and Sweden is sometimes eaten, mixed with flour or ground birch bark, in times of scarcity. This name is also given to a white powdery variety of calcite..

Pisolite :: Pisolite (n.) A variety of calcite, or calcium carbonate, consisting of aggregated globular concretions about the size of a pea; -- called also peastone, peagrit..

Rhodochrosite :: Rhodochrosite (n.) Manganese carbonate, a rose-red mineral sometimes occuring crystallized, but generally massive with rhombohedral cleavage like calcite; -- called also dialogite..

Calcareous :: Calcareous (a.) Partaking of the nature of calcite or calcium carbonate; consisting of, or containing, calcium carbonate or carbonate of lime..

Shiver-spar :: Shiver-spar (n.) A variety of calcite, so called from its slaty structure; -- called also slate spar..

Argentine :: Argentine (n.) A siliceous variety of calcite, or carbonate of lime, having a silvery-white, pearly luster, and a waving or curved lamellar structure..

Aphrite :: Aphrite (n.) See under Calcite.

Nitrocalcite :: Nitrocalcite (n.) Nitrate of calcium, a substance having a grayish white color, occuring in efforescences on old walls, and in limestone caves, especially where there exists decaying animal matter..

Iceland Spar :: Iceland spar () A transparent variety of calcite, the best of which is obtained in Iceland. It is used for the prisms of the polariscope, because of its strong double refraction. Cf. Calcite..

Baryto-calcite :: Baryto-calcite (n.) A mineral of a white or gray color, occurring massive or crystallized. It is a compound of the carbonates of barium and calcium..

Paramorph :: Paramorph (n.) A kind of pseudomorph, in which there has been a change of physical characters without alteration of chemical composition, as the change of aragonite to calcite..

Spar :: Spar (n.) An old name for a nonmetallic mineral, usually cleavable and somewhat lustrous; as, calc spar, or calcite, fluor spar, etc. It was especially used in the case of the gangue minerals of a metalliferous vein..

Calcite :: Calcite (n.) Calcium carbonate, or carbonate of lime. It is rhombohedral in its crystallization, and thus distinguished from aragonite. It includes common limestone, chalk, and marble. Called also calc-spar and calcareous spar..

Dimorph :: Dimorph (n.) Either one of the two forms of a dimorphous substance; as, calcite and aragonite are dimorphs..

Septarium :: Septarium (n.) A flattened concretionary nodule, usually of limestone, intersected within by cracks which are often filled with calcite, barite, or other minerals..

Calc-spar :: Calc-spar (n.) Same as Calcite.

Amygdaloid :: Amygdaloid (n.) A variety of trap or basaltic rock, containing small cavities, occupied, wholly or in part, by nodules or geodes of different minerals, esp. agates, quartz, calcite, and the zeolites. When the imbedded minerals are detached or removed by decomposition, it is porous, like lava..

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