| MadSci Network: Chemistry |
Hello Gabriel You haven't a hope to find a formula that tells you the melting, boiling and dissociation temperatures (and at what pressures) for all minerals. There are simply too mamy of them! All you might find if formulae that work for a very few different very restricted classes of minerals. The common minerals are compounds of: Silver, Arsenic, gold, bismuth, carbon, copper, iron, nickel, lead, platinum, antimony, tin, zinc, sodium, potassium, calcium, magnesium, aluminium, mercury etc These can be present as: sulphides, arsenides, tellurides, selenides, sulphates, sulphites, oxides, hydroxides, mixed (multiple metal) oxides, halides, carbonates, nitrates, borates, flourides, phosphates, molybdates, tungstates, ortho and ring-structure silicates, chain and band structure silicates, framework and sheet silicates etc In each case there may be even hundreds of physical (e.g. crystal) forms, each with different melting,and physical-form-change, states. A good table of Minerals (and their synonyms and physical constants) can be found in "Handbook of Chemistry and Physics", Chemical Rubber Co, 59th edition, pages B220 to B259. For melting points see the same book pages B91 to B184 and B271 to 275 and C686 to C721 and D51 to 58. Some of those tables give boiling temperatures too (at given pressures). If it is "rocks" you are interested in, see table F199 "chemical composition of rocks" John
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