英语词汇“spinel group”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

a. Mineralogy. The typical species of a group of minerals (the spinel group), which are compounds of sesquioxides with protoxides, and crystallize in the isometric system. The formula of the typical species is MgAl₂O₄.

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the world > the earth > minerals > types of mineral > oxides and hydroxides > [noun] > spinel group AB2 O4

spinelle ruby1802

spinelle1804

spinel1807

1807 T. Thomson Syst. Chem. (ed. 3) II. 482 This mineral, which has some resemblance to the spinel, was found composed of 60 parts alumina [etc.].

1816 R. Jameson Treat. External Characters Minerals (ed. 2) 127 Triple crystals..occur in spinel and calcareous-spar.

1842 Penny Cycl. XXII. 348/2 Spinell is found in Ceylon and Siam in isolated and rolled crystals in the beds of rivers.

1888 F. Rutley Rock-forming Minerals 108 Ordinary spinel appears reddish, or colourless by transmitted light.

1953 F. H. Pough Field Guide Rocks & Minerals ii. 141 Spinel, like corundum, is a mineral of metamorphosed limestones and low-silica pegmatites, and consequently it is commonly associated with corundum.

1977 A. Hallam Planet Earth 137 The name spinel broadly refers to a group which includes the minerals magnetite and chromite. In a narrower sense, spinel is the magnesium aluminum oxide member of the group.

单词	spinel group
释义	> as lemmas spinel group a. Mineralogy. The typical species of a group of minerals (the spinel group), which are compounds of sesquioxides with protoxides, and crystallize in the isometric system. The formula of the typical species is MgAl₂O₄. ΘΚΠ the world > the earth > minerals > types of mineral > oxides and hydroxides > [noun] > spinel group AB2 O4 spinelle ruby1802 spinelle1804 spinel1807 1807 T. Thomson Syst. Chem. (ed. 3) II. 482 This mineral, which has some resemblance to the spinel, was found composed of 60 parts alumina [etc.]. 1816 R. Jameson Treat. External Characters Minerals (ed. 2) 127 Triple crystals..occur in spinel and calcareous-spar. 1842 Penny Cycl. XXII. 348/2 Spinell is found in Ceylon and Siam in isolated and rolled crystals in the beds of rivers. 1888 F. Rutley Rock-forming Minerals 108 Ordinary spinel appears reddish, or colourless by transmitted light. 1953 F. H. Pough Field Guide Rocks & Minerals ii. 141 Spinel, like corundum, is a mineral of metamorphosed limestones and low-silica pegmatites, and consequently it is commonly associated with corundum. 1977 A. Hallam Planet Earth 137 The name spinel broadly refers to a group which includes the minerals magnetite and chromite. In a narrower sense, spinel is the magnesium aluminum oxide member of the group. extracted from spineln. < as lemmas
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> as lemmas