Carbonate chloride


The carbonate chlorides are double salts containing both carbonate and chloride anions. 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 materials.

Formation

Natural

is produced in nature by metasomatism, where hot high pressure water solutions of carbon dioxide and sodium chloride modify plagioclase.
Chloroartinite is found in Sorel cements exposed to air.

Minerals

In 2016 27 chloride containing carbonate minerals were known.
nameformulacrystal systemspace groupunit celldensityOptics refractive indexRaman spectrumcommentsreference
AlexkhomyakoviteK65Cl∙6H2OhexagonalP63/mcma=9.2691, c=15.8419, V=1178.72 Z = 22.25uniaxial, ω=1.543, ε=1.476
AshburtoniteHPb4Cu444Cl
Balliranoite6Ca2Cl2hexagonalP63a=12.695 c=5.325 V=743.2 Z=12.48uniaxial, ω=1.523, ε=1.525
BarstowitePb4Cl6.H2O
ChlorartiniteMg2Cl.3H2O
Chlormagaluminite4Al2122·2H2O6/mmm1.98-2.09ε=1.560 ω=1.540
Davynecan substitute CO3 for SO4
Decrespignyite-Y4Cu4Cl5·2H2OV4 bending 694, 718 and 746; V2 bending 791, 815, 837 and 849;v3 antisymmetric stretching 1391, 1414, 1489, 1547; also OH stretchinglight blue
DeferniteCa3CO34.H2O
HanksiteNa22K92ClhexagonalP63/ma = 10.46 Å
c = 21.19 Å; Z = 2
iowaiteMg6Fe216·4H2O
KampfiteBa12O318Cl5monoclinicCca = 31.2329, b=5.2398, c=9.0966
β = 106.933°		uniaxial, nω = 1.642 nε = 1.594
MarialiteNa43
Mineevite-Na25BaY21142F2Cl
NorthupiteNa3Mg2CloctahedralFd3Z=161.514v4 bending 714; v3 antisymmetric stretching 1554
PhosgenitePb2CO3Cl2tetragonala=8.15 c=8.87
Reederite-Na15Y29Cl
Sakhaite Ca48Mg16Al41628·33or Ca12Mg474Cl2·H2O
ScapoliteCa3Na5ClP42/na=12.07899 c=7.583467 V=1106.443
TatarskiteCa6Mg2224Cl4•7H2OorthorhombicBiaxial nα = 1.567 nβ = 1.654 nγ = 1.722
TunisiteNaCa2Al44Cl8tetragonalP4/nmma=11.198 c=6.5637 Z=2
Vasilyevite10O6I3Br2ClP1 overbara 9.344, b 10.653, c 18.265, α=93.262 β=90.548 γ=115.422° V=1638.3 Z=29.57

Artificial

Complexes

The "lanthaballs" are lanthanoid atom clusters held together by carbonate and other ligands. They can form chlorides. Examples are Cl3·25H2O where ccnm is carbamoylcyanonitrosomethanide and phen is 1,10-phenanthroline. Praseodymium or cerium can substitute for lanthanum. Other lanthanide cluster compounds include :6•2CO3•4
Cl2•L•2OAc and 6•CO3•14Cl•2H2O with OAc=acetate, and L=3-furancarboxylate and Hhmp=2,2-bispropionic acid.
Platinum can form complexes with carbonate and chloride ligands, in addition to an amino acid. Examples include the platinum compound 2.2H2O gluH=glutamic acid, and Na.H2O gln=glutamine. Rhodium complexes include Rh222Cl