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chem. (àíãë.: calcium carbonate; calcium white; chemical chalk; carbonate of lime // íåì.: Calciumkarbonat; Kalziumkarbonat; kohlensaurer Kalk; Schlammsaftkarbonat; Kalkspat) kaltsiumkarbonaat
См. также в других словарях:
Chalk (disambiguation) — Chalk may refer to: Chalk, a soft, white, porous form of limestone, composed of calcium carbonate Blackboard chalk, calcium sulfate, also marketed as sidewalk chalk Chalk (drying agent), magnesium carbonate, used for hands in rock climbing,… … Wikipedia
Chalk — (ch[add]k), n. [AS. cealc lime, from L. calx limestone. See {Calz}, and {Cawk}.] 1. (Min.) A soft, earthy substance, of a white, grayish, or yellowish white color, consisting of calcium carbonate, and having the same composition as common… … The Collaborative International Dictionary of English
Chalk drawing — Chalk Chalk (ch[add]k), n. [AS. cealc lime, from L. calx limestone. See {Calz}, and {Cawk}.] 1. (Min.) A soft, earthy substance, of a white, grayish, or yellowish white color, consisting of calcium carbonate, and having the same composition as… … The Collaborative International Dictionary of English
Chalk formation — Chalk Chalk (ch[add]k), n. [AS. cealc lime, from L. calx limestone. See {Calz}, and {Cawk}.] 1. (Min.) A soft, earthy substance, of a white, grayish, or yellowish white color, consisting of calcium carbonate, and having the same composition as… … The Collaborative International Dictionary of English
Chalk line — Chalk Chalk (ch[add]k), n. [AS. cealc lime, from L. calx limestone. See {Calz}, and {Cawk}.] 1. (Min.) A soft, earthy substance, of a white, grayish, or yellowish white color, consisting of calcium carbonate, and having the same composition as… … The Collaborative International Dictionary of English
Chalk mixture — Chalk Chalk (ch[add]k), n. [AS. cealc lime, from L. calx limestone. See {Calz}, and {Cawk}.] 1. (Min.) A soft, earthy substance, of a white, grayish, or yellowish white color, consisting of calcium carbonate, and having the same composition as… … The Collaborative International Dictionary of English
Chalk period — Chalk Chalk (ch[add]k), n. [AS. cealc lime, from L. calx limestone. See {Calz}, and {Cawk}.] 1. (Min.) A soft, earthy substance, of a white, grayish, or yellowish white color, consisting of calcium carbonate, and having the same composition as… … The Collaborative International Dictionary of English
Chalk pit — Chalk Chalk (ch[add]k), n. [AS. cealc lime, from L. calx limestone. See {Calz}, and {Cawk}.] 1. (Min.) A soft, earthy substance, of a white, grayish, or yellowish white color, consisting of calcium carbonate, and having the same composition as… … The Collaborative International Dictionary of English
Carbonate Compensation Depth — (CCD) is the depth in the oceans below which the rate of supply of calcium carbonate (calcite and aragonite) equals the rate of solvation, such that no calcium carbonate is preserved. Calcium carbonate is essentially insoluble in sea surface… … Wikipedia
chalk — ► NOUN 1) a white soft limestone (calcium carbonate) formed from the skeletal remains of sea creatures. 2) a similar substance (calcium sulphate), made into sticks and used for drawing or writing. ► VERB 1) draw or write with chalk. 2) Brit.… … English terms dictionary
Carbonate rock — Carbonate rocks are a class of sedimentary rocks composed primarily of carbonate minerals. The two major types are limestone and dolomite, composed of calcite (CaCO3) and the mineral dolomite (CaMg(CO3)2) respectively. Chalk and tufa are also… … Wikipedia