Dictionary of Chemistry [6th Ed.]

Ca 10 (PO 4 ) 6 F 2 + 7H 2 SO 4 = 3Ca(H 2 PO 4 ) 2 + 7CaSO 4 + 2HF Triple-superphosphate is made by using phosphoric(V) acid in ...

equally be deÜned as the energy re- quired to increase the surface area isothermally by one square metre, i.e. it can be measure ...

time known as supramolecular syn- thons. Système International d’Unités See si units. Szilard–Chalmers effect An ef- fect discov ...

T 2,4,5-T 2,4,5-trichlorophenoxyacetic acid (2,4,5-trichlorophenoxyethanoic acid): a synthetic auxin formerly widely used as a h ...

grey metallic *transition element; a.n. 73; r.a.m. 180.948; r.d. 16.63; m.p. 2996°C; b.p. 5427°C. It is found with niobium in th ...

tive elements. Compounds of tel- lurium with nonmetals are covalent (e.g. H 2 Te). Metal tellurides can be made by direct combin ...

no rotational or vibrational energy). According to *kinetic theory, the thermodynamic temperature of such a gas is given by T = ...

temporary hardness See hard- ness of water. tera-Symbol T. A preÜx used in the metric system to denote one million million times ...

those of coriander, cumin, lemon, and samphire. It can be made by the action of an alcoholic sulphuric acid solution on pinene ( ...

has been used as a possible treat- ment for a number of medical condi- tions. It is used illegally in the form of cannabis, whic ...

thermiteA stoichiometric pow- dered mixture of iron(III) oxide and aluminium for the reaction: 2Al + Fe 2 O 3 →Al 2 O 3 + 2Fe Th ...

in thermal equilibrium with a third body, then all three bodies are in thermal equilibrium with each other. See also enthalpy; f ...

containing aÜve-membered ring with sulphur and nitrogen hetero atoms, C 3 SNH 3. A range of thiazole dyes are manufactured conta ...

came a professor at Cambridge Uni- versity in 1884. He is best known for his work on cathode rays, which led to his discovery of ...

less crystalline compound, C 10 H 14 O; m.p. 51°C. It occurs in various essen- tial oils, particularly oil of thyme, and can be ...

tincture A solution with alcohol as the solvent (e.g. tincture of iodine). tin(IV) hydride (stannane)A highly reactive and volat ...

used to produce other titanium com- pounds and pure titanium metal. titanium dioxideSee titanium(iv) oxide. titanium(IV) oxide ( ...

angle between ± 90 °and 180°. An- other distinction is between clinal arrangements (value between 30° and 150°or –30°and –150°) ...

joliotium (Jl, 105) rutherfordium (Rf, 106) bohrium (Bh, 107) hahnium (Hn, 108) meitnerium (Mt, 109) The ACU favoured a differen ...

There is a further series of this type in the next period of the table: be- tween yttrium ([Kr]4d 5 s^2 ) and cad- mium ([Kr]4d^ ...