www.britannica.com/science/carbonate-mineralThe crystal structure of many carbonate minerals reflects the trigonal symmetry of the carbonate ion, which is composed of a carbon atom centrally located in an equilateral triangle of oxygen atoms. This anion group usually occurs in combination with calcium, sodium, uranium, iron, aluminum, manganese, barium, zinc, copper, lead, or the rare-earth elements.
www.thoughtco.com/all-about-carbonate-minerals-4122721Generally, the carbonate minerals are found at or near the surface. They represent the Earth's largest storehouse of carbon. They all are on the soft side, from hardness 3 to 4 on the Mohs hardness scale. Every serious rockhound and geologist takes a little vial of hydrochloric acid into the field, just to deal with the carbonates. The ...
www.sciencedirect.com/topics/.../carbonate-mineralsCarbonate minerals such as calcite and aragonite, the principle components of limestone and most phosphate and sulfate minerals will dissolve readily in 1 N HCl at room temperature. Chloride ions may be avoided by digestion in HNO 3, however, heating may be necessary for some phosphate minerals.
mineralogy4kids.orgThe copper carbonate minerals, azurite and malachite, are the only important economic carbonates. Minerals of the carbonate class: Are transparent. Are lightly-colored with a white streak. Have average to above average specific gravity. Are soft with good to perfect cleavage. Soluble in acidic solutions. Minerals. Aragonite.
www.galleries.com/CarbonatesThe carbonates and related nitrates and borates are common constituents of the earth's near-surface crust. This is a structurally-related as well as chemically-related group. The basic anionic (negatively charged) unit of this class consists of a triangle where at the center resides either a carbon, nitrogen or boron atom.
www.911metallurgist.com/.../introduction-most-common-carbonate-minerals-listThis is an introduction list that covers the most common carbonates minerals which are compounds of carbon dioxide (frequently called carbonic acid) with oxides of metals. In naming individual carbonates, the name of the metal is used; but if the name of the oxide of the metal is better known, as lime, for example, which is calcium oxide, the name of the oxide will be used instead of the name ...
en.wikipedia.org/wiki/CarbonatiteCarbonatite is composed predominantly of carbonate minerals and extremely unusual in its major element composition as compared to silicate igneous rocks, obviously because it is composed primarily of Na 2 O and CaO plus CO 2.. Most carbonatites tend to include some silicate mineral fraction; by definition an igneous rock containing >50% carbonate minerals is classified as a carbonatite.
www.gly.uga.edu/railsback/CO3/CO3mins_pure.html3 Column number.row number.mineral number in Figure 1 of Railsback's 1999 paper on "Patterns in the compositions, properties, and geochemistry of carbonate minerals" (Carbonates and Evaporites, v. 14, p. 1-20). 4 The status of yoshikawaite is uncertain; its name has never been submitted to the IMA's CNMMN.
soils.wisc.edu/facstaff/barak/temp/soil8510/notes/carbonates_et_al.htmlThe combination of compositional analysis and morphology are often conclusive, although there is some problem with the carbonate minerals, as C and O are not detectable by most EDX analyzers. In modern instruments one can also determine structural parameters by rocking beam techniques and the patterns thus produced.