Mohsn.

Brit.

/ˈməʊ(z)/, U.S.

/ˈmoʊ(s)/

Forms: 1800s– Moh (irregular), 1800s– moh (irregular), 1800s– Mohs.

Origin: From a proper name. Etymon: proper name Mohs.

Etymology: < the name of Friedrich Mohs (1773–1839), German mineralogist, who devised the scale in 1822.The forms Moh , moh are re-formations arising from misanalysis of the word as a genitive form (compare Moh's in quots. 1903, 1940, 1969, etc.).

attributive, in the genitive, and †with of (obsolete). Designating a scale of hardness in which ten reference minerals, ranging from very soft to very hard ones, are assigned values of one to ten in order of increasing hardness. Also: a unit of hardness on this scale.The ten minerals of the scale are: 1, talc; 2, gypsum; 3, calcite; 4, fluorspar; 5, apatite; 6, orthoclase; 7, quartz; 8, topaz; 9, corundum; 10, diamond.

ΘΚΠ

the world > the earth > earth sciences > geology > mineralogy > [noun] > scale of hardness

Mohs1857

1857 W. P. Blake Geol. Rep. (U.S. War Dept.: Rep. Explor. Route to Pacific V) ii. 290 Its powder is a dark rusty-brown, and its hardness about five on the scale of Mohs.

1879 Mineral. Mag. 2 265 Its density is 1·0025; hardness between 1 and 2 of Mohs's scale.

1897 Amer. Jrnl. Sci. 154 409 We shall describe only a preliminary series of tests with the minerals of the Mohs scale.

1903 J. E. Marr Agric. Geol. ii. 28 Moh's scale of hardness.

1934 J. H. Perry Chem. Engineers' Handbk. xvi. 1558 The hardness of a material as measured by the moh scale is not always a criterion of its resistance to crushing.

1940 F. F. Grout Kemp's Handbk. Rocks (ed. 6) i. 7 Rocks are commonly mixtures of minerals, and their hardness cannot be tested satisfactorily by Moh's scale from 1 to 10.

1951 D. Tabor Hardness of Metals i. 2 The Mohs hardness scale has been widely used by mineralogists and lapidaries.

1962 R. Webster Gems I. iv. 74 The hardness of beryl is 7½ on Mohs's scale.

1969 B. R. Schlenker Introd. Materials Sci. iv. 69 A Moh's hardness determination set of minerals.

1974 Sci. Amer. Aug. 64 Each material in the Mohs scale, up to Mohs 9 (corundum), is about 1·2 times as hard as the preceding material. Thus the scale is almost logarithmic from Mohs 1 through Mohs 9, a range that includes all but a few substances.

1991 Mining Mag. Feb. 110/3 Series 3 Imp mill systems to pulverize and process materials rated 2 or less on the Mohs' scale of hardness are now available.

This entry has been updated (OED Third Edition, September 2002; most recently modified version published online March 2022).

单词	mohs
释义	Mohsn. Brit. /ˈməʊ(z)/, U.S. /ˈmoʊ(s)/ Forms: 1800s– Moh (irregular), 1800s– moh (irregular), 1800s– Mohs. Origin: From a proper name. Etymon: proper name Mohs. Etymology: < the name of Friedrich Mohs (1773–1839), German mineralogist, who devised the scale in 1822.The forms Moh , moh are re-formations arising from misanalysis of the word as a genitive form (compare Moh's in quots. 1903, 1940, 1969, etc.). attributive, in the genitive, and †with of (obsolete). Designating a scale of hardness in which ten reference minerals, ranging from very soft to very hard ones, are assigned values of one to ten in order of increasing hardness. Also: a unit of hardness on this scale.The ten minerals of the scale are: 1, talc; 2, gypsum; 3, calcite; 4, fluorspar; 5, apatite; 6, orthoclase; 7, quartz; 8, topaz; 9, corundum; 10, diamond. ΘΚΠ the world > the earth > earth sciences > geology > mineralogy > [noun] > scale of hardness Mohs1857 1857 W. P. Blake Geol. Rep. (U.S. War Dept.: Rep. Explor. Route to Pacific V) ii. 290 Its powder is a dark rusty-brown, and its hardness about five on the scale of Mohs. 1879 Mineral. Mag. 2 265 Its density is 1·0025; hardness between 1 and 2 of Mohs's scale. 1897 Amer. Jrnl. Sci. 154 409 We shall describe only a preliminary series of tests with the minerals of the Mohs scale. 1903 J. E. Marr Agric. Geol. ii. 28 Moh's scale of hardness. 1934 J. H. Perry Chem. Engineers' Handbk. xvi. 1558 The hardness of a material as measured by the moh scale is not always a criterion of its resistance to crushing. 1940 F. F. Grout Kemp's Handbk. Rocks (ed. 6) i. 7 Rocks are commonly mixtures of minerals, and their hardness cannot be tested satisfactorily by Moh's scale from 1 to 10. 1951 D. Tabor Hardness of Metals i. 2 The Mohs hardness scale has been widely used by mineralogists and lapidaries. 1962 R. Webster Gems I. iv. 74 The hardness of beryl is 7½ on Mohs's scale. 1969 B. R. Schlenker Introd. Materials Sci. iv. 69 A Moh's hardness determination set of minerals. 1974 Sci. Amer. Aug. 64 Each material in the Mohs scale, up to Mohs 9 (corundum), is about 1·2 times as hard as the preceding material. Thus the scale is almost logarithmic from Mohs 1 through Mohs 9, a range that includes all but a few substances. 1991 Mining Mag. Feb. 110/3 Series 3 Imp mill systems to pulverize and process materials rated 2 or less on the Mohs' scale of hardness are now available. This entry has been updated (OED Third Edition, September 2002; most recently modified version published online March 2022). < n.1857
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