Mohs' scale


Mohs' scale
Mohs' scale 'mōz-, 'mōs-, 'mō-səz- n
1) a scale of hardness for minerals in which 1 represents the hardness of talc; 2, gypsum; 3, calcite; 4, fluorite; 5, apatite; 6, orthoclase; 7, quartz; 8, topaz; 9, corundum; and 10, diamond
2) a revised and expanded version of the original Mohs' scale which provides finer distinctions between the harder materials and in which 1 represents the hardness of talc; 2, gypsum; 3, calcite; 4, fluorite; 5, apatite; 6, orthoclase; 7, vitreous pure silica; 8, quartz; 9, topaz; 10, garnet; 11, fused zirconium oxide; 12, fused alumina; 13, silicon carbide; 14, boron carbide; and 15, diamond
Mohs 'mōs Friedrich (1773-1839)
German mineralogist. Mohs's chief scientific contribution was establishing systematic mineralogy on a new basis. He was placed in charge of several important mineral collections, of which he later published systematic descriptions. In the early 1820s he developed a new method of mineral classification that focused on the arrangements of minerals in crystal systems based on external symmetry. In 1812 he introduced the Mohs' scale of hardness for minerals. By the 1820s the scale had been widely adopted by other mineralogists.

Medical dictionary. 2011.

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  • Mohs scale — [mōz] n. [after F. Mohs (1773 1839), Ger mineralogist] Mineralogy 1. an arbitrary scale used to indicate relative hardness, arranged in 10 ascending degrees: 1, talc; 2, gypsum; 3, calcite; 4, fluorite; 5, apatite; 6, orthoclase; 7, quartz; 8,… …   English World dictionary

  • Mohs scale — Mohs′ scale [[t]moʊz[/t]] n. mir a scale of hardness for minerals, consisting of the following degrees, in increasing hardness: talc 1; gypsum 2; calcite 3; fluorite 4; apatite 5; orthoclase 6; quartz 7; topaz 8; corundum 9; diamond 10 •… …   From formal English to slang

  • mohs' scale — ˈmōz , ōs(ə̇z) noun Usage: usually capitalized M Etymology: after Friedrich Mohs died 1839 German mineralogist 1. : a scale of hardness for minerals ranging from 1 for the softest to 10 for the hardest in which 1 represents the hardness of talc;… …   Useful english dictionary

  • Mohs scale — noun a scale of hardness of solids; talc is 0 and diamond is 10; ordering is determined by which substance can scratch another substance • Hypernyms: ↑scale, ↑scale of measurement, ↑graduated table, ↑ordered series * * * /mohz/ a scale of… …   Useful english dictionary

  • Mohs scale — Moso skalė statusas T sritis Standartizacija ir metrologija apibrėžtis Mineralų kietumo skalė, kurią sudaro 10 kietumo etalonų, pvz., talko kietumas – 1, deimanto – 10. atitikmenys: angl. Mohs hardness scale; Mohs scale vok. Härteskala nach Mohs …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • Mohs scale — n. Mohs Scale of Hardness, scale used to classify minerals according to their relative hardness (Mineralogy) …   English contemporary dictionary

  • Mohs scale — Moso skalė statusas T sritis chemija apibrėžtis Mineralų kietumo skalė, kurią sudaro 10 kietumo etalonų, pvz., talko kietumas 1, deimanto – 10. atitikmenys: angl. Mohs scale rus. шкала Мооса …   Chemijos terminų aiškinamasis žodynas

  • Mohs' scale — noun Etymology: Friedrich Mohs died 1839 German mineralogist Date: 1879 a scale of hardness for minerals that ranges from a value of 1 for talc to 10 for diamond …   New Collegiate Dictionary

  • Mohs scale — /mohz/ a scale of hardness used in mineralogy. Its degrees, in increasing hardness, are: talc 1; gypsum 2; calcite 3; fluorite 4; apatite 5; feldspar 6; quartz 7; topaz 8; sapphire 9; diamond 10. Abbr.: MSH [1875 80; named after F. Mohs (1773… …   Universalium

  • Mohs' scale — [məʊz] noun a scale of hardness used in classifying minerals. Origin C19: named after the German mineralogist Friedrich Mohs …   English new terms dictionary


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