The carbonate chlorides are double salts containing both

carbonate A carbonate is a salt of carbonic acid (H2CO3), characterized by the presence of the carbonate ion, a polyatomic ion with the formula . The word ''carbonate'' may also refer to a carbonate ester, an organic compound containing the carbonat ...

and

chloride The chloride ion is the anion (negatively charged ion) Cl−. It is formed when the element chlorine (a halogen) gains an electron or when a compound such as hydrogen chloride is dissolved in water or other polar solvents. Chloride s ...

anion An ion () is an atom or molecule with a net electrical charge. The charge of an electron is considered to be negative by convention and this charge is equal and opposite to the charge of a proton, which is considered to be positive by conve ...

s. Quite a few minerals are known. Several artificial compounds have been made. Some complexes have both carbonate and chloride ligands. They are part of the family of halocarbonates. In turn these halocarbonates are a part of

mixed anion material Mixed is the past tense of ''mix''. Mixed may refer to: * Mixed (United Kingdom ethnicity category), an ethnicity category that has been used by the United Kingdom's Office for National Statistics since the 1991 Census * ''Mixed'' (album), a co ...

s. The carbonate chlorides do not have a bond from chlorine to carbon, however "chlorocarbonate" has also been used to refer to the chloroformates which contain the group ClC(O)O-.

Formation

Natural

Scapolite The scapolites (Gr. σκάπος, rod, and λίθος, stone) are a group of rock-forming silicate minerals composed of aluminium, calcium, and sodium silicate with chlorine, carbonate and sulfate. The two endmembers are meionite () and marial ...

is produced in nature by

metasomatism Metasomatism (from the Greek μετά ''metá'' "change" and σῶμα ''sôma'' "body") is the chemical alteration of a rock by hydrothermal and other fluids. It is the replacement of one rock by another of different mineralogical and chemical c ...

, where hot high pressure water solutions of carbon dioxide and sodium chloride modify

plagioclase Plagioclase is a series of tectosilicate (framework silicate) minerals within the feldspar group. Rather than referring to a particular mineral with a specific chemical composition, plagioclase is a continuous solid solution series, more pro ...

. Chloroartinite is found in

Sorel cement Sorel cement (also known as magnesia cement or magnesium oxychloride) is a non-hydraulic cement first produced by the French chemist Stanislas Sorel in 1867.Sorel Stanislas (1867).Sur un nouveau ciment magnésien. ''Comptes Rendus Hebdomadaires de ...

s exposed to air.

Minerals

In 2016 27 chloride containing carbonate minerals were known.

Artificial

Complexes

The " lanthaballs" are lanthanoid atom clusters held together by carbonate and other

ligand In coordination chemistry, a ligand is an ion or molecule ( functional group) that binds to a central metal atom to form a coordination complex. The bonding with the metal generally involves formal donation of one or more of the ligand's ele ...

s. They can form chlorides. Examples are a₁₃(ccnm)₆(CO₃)₁₄(H₂O)₆(phen)₁₈Cl₃(CO₃)·25H₂O where ccnm is carbamoylcyanonitrosomethanide and phen is 1,10-phenanthroline. Praseodymium (Pr) or

cerium Cerium is a chemical element with the symbol Ce and atomic number 58. Cerium is a soft, ductile, and silvery-white metal that tarnishes when exposed to air. Cerium is the second element in the lanthanide series, and while it often shows the +3 o ...

(Ce) can substitute for lanthanum (La). Other lanthanide cluster compounds include :(H₃O)₆ y₇₆O₁₀(OH)₁₃₈(OAc)₂₀(L)₄₄(H₂O)₃₄��2CO₃•4 Cl₂•L•2OAc (nicknamed Dy₇₆) and (H₃O)₆ y₄₈O₆(OH)₈₄(OAc)₄(L)₁₅(hmp)₁₈(H₂O)₂₀��CO₃•14Cl•2H₂O (termed Dy₄₈-T) with OAc=acetate, and L= 3-furancarboxylate and Hhmp=

2,2-bis(hydroxymethyl)propionic acid Dimethylolpropionic acid (DMPA) is a chemical compound that has the full IUPAC name of 2,2-bis(hydroxymethyl)propionic acid and is an organic compound with one carboxyl and two hydroxy groups. It has the CAS Registry Number of 4767-03-7. Prope ...

Platinum Platinum is a chemical element with the symbol Pt and atomic number 78. It is a dense, malleable, ductile, highly unreactive, precious, silverish-white transition metal. Its name originates from Spanish , a diminutive of "silver". Pla ...

can form complexes with carbonate and chloride ligands, in addition to an

amino acid Amino acids are organic compounds that contain both amino and carboxylic acid functional groups. Although hundreds of amino acids exist in nature, by far the most important are the alpha-amino acids, which comprise proteins. Only 22 alpha ...

. Examples include the platinum compound t(gluH)Cl(CO₃)sub>2.2H₂O gluH=glutamic acid, and Na t(gln)Cl₂(CO₃)H₂O gln=glutamine.

Rhodium Rhodium is a chemical element with the symbol Rh and atomic number 45. It is a very rare, silvery-white, hard, corrosion-resistant transition metal. It is a noble metal and a member of the platinum group. It has only one naturally occurring ...

complexes include Rh₂(bipy)₂(CO₃)₂Cl (bipy= bipyridine)

References

{{Reflist Carbonates Chlorides Mixed anion compounds Double salts