Chlorine

chlorine

halite

carnallite

sylvite

Symbol: Cl
Chlorine does not occur in the native state. It is gaseous under normal ambient conditions.
The most common oxidation state is -1
Melting point: -101^oC
Boiling point: -34^oC
Abundance in the Earth's crust: 145 parts per million by mass, 85 parts per million by moles (ChC).
Abundance in the Solar System: 8 parts per million by mass, 0.3 parts per million by moles (ChC).

Chlorine-bearing minerals include:

Sulphides - the sulphide anion is S^2-
Sulphosalt - A_mB_nX_p: where A is a metal , B usually a semi-metal and X is sulphur, selenium or tellurium
Oxides - the oxide anion is O^2-
Hydroxides - the hydroxide anion is (OH)^-
Chlorides - the chloride anion is Cl^-
Fluorides - the fluoride anion is F^-
Bromides - the bromide anion is Br^-
Carbonates - the carbonate anion is (CO₃)^2-
Nitrates - the nitrate anion is (NO₃)^-
Iodates - the iodate anion is (IO₃)^-
Monoborates - with a single boron triangle (BO₃)^3- and/or tetrahedron B(O,OH)₄
Diborates - with two boron triangles or tetrahedra or both
Pentaborates - with five boron triangles or tetrahedra or both
Heptaborates - with seven boron triangles or tetrahedra or both
Megaborates - with multiple boron triangles or tetrahedra or both
Sulphates - the sulphate anion is (SO₄)^2-
Selenates - the selenate anion is (SeO₄)^2-
Tellurates - salts of telluric acid H₆Te⁶⁺O₆
Selenites - the selenite anion is (Se⁴⁺O₃)^2-
Tellurites - the tellurite anion is (Te⁴⁺O₃)^2-
Chromates - the chromate anion is (CrO₄)^2-
Phosphates - the phosphate anion is (P⁵⁺O₄)^3-
Arsenates - the arsenate anion is (As⁵⁺O₄)^3-
Vanadates - the vanadate anion is (V⁵⁺O₄)^3-
Arsenite - the arsenite anion is (As³⁺O₃)^3-
Nesosilicates - insular (Si⁴⁺O₄)^4- groups
Sorosilicate - (Si⁴⁺₂O₇)^6- groups
Cyclosilicates - (Si⁴⁺_nO_3n)^2n- groups
Inosilicates - double chains - (Si⁴⁺_4nO_11n)^6n- groups
Phyllosilicates - (Si⁴⁺₂O₅)^2- groups
Tectosilicate - [Al³⁺_xSi⁴⁺O_yO_(2x+2y)]^x−
Organic compounds

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