malaconn.

Brit.

/ˈmaləkən/, U.S.

/ˈmæləˌkɑn/

Forms: 1800s malacone, 1800s– malacon.

Origin: A borrowing from German. Etymon: German Malakon.

Etymology: < German Malakon (T. Scheerer 1844, in Ann. der Physik 62 436) < ancient Greek μαλακόν , neuter of μαλακός soft (see malaco- comb. form).

Mineralogy.

A soft brown altered form of zircon.

ΘΚΠ

the world > the earth > minerals > types of mineral > silicates > nesosilicates > [noun] > zircon group > zircon

jargon1769

zircon1794

zirconite1806

Matara diamond1807

malacon1854

hyacinth1879

lavenite1886

1854 J. D. Dana Syst. Mineral. (ed. 4) 111. ii. 196 Malacone.

1868 J. D. Dana Syst. Mineral. (ed. 5) 275 The following tetragonal zircon-like minerals are probably altered zircon... Malacon.

1921 Mineral. Abstr. 1 173 The malacon of Madagascar shows a higher degree of radioactivity than is accounted for by its content of thorium.

1941 Amer. Jrnl. Sci. 239 306 The third type of [zircon] is characteristic of the younger granite in the Oxford House Area, and of the late pre-Huronian and Huronian granites of the Lake Superior region. This variety is malacon, a form of zircon with relatively low refringence, weak birefringence and a dirty, altered appearance.

1968 I. Kostov Mineral. 11. v. 294 Malacon is a metamict zircon.

This entry has been updated (OED Third Edition, June 2000; most recently modified version published online March 2022).

单词	malacon
释义	malaconn. Brit. /ˈmaləkən/, U.S. /ˈmæləˌkɑn/ Forms: 1800s malacone, 1800s– malacon. Origin: A borrowing from German. Etymon: German Malakon. Etymology: < German Malakon (T. Scheerer 1844, in Ann. der Physik 62 436) < ancient Greek μαλακόν , neuter of μαλακός soft (see malaco- comb. form). Mineralogy. A soft brown altered form of zircon. ΘΚΠ the world > the earth > minerals > types of mineral > silicates > nesosilicates > [noun] > zircon group > zircon jargon1769 zircon1794 zirconite1806 Matara diamond1807 malacon1854 hyacinth1879 lavenite1886 1854 J. D. Dana Syst. Mineral. (ed. 4) 111. ii. 196 Malacone. 1868 J. D. Dana Syst. Mineral. (ed. 5) 275 The following tetragonal zircon-like minerals are probably altered zircon... Malacon. 1921 Mineral. Abstr. 1 173 The malacon of Madagascar shows a higher degree of radioactivity than is accounted for by its content of thorium. 1941 Amer. Jrnl. Sci. 239 306 The third type of [zircon] is characteristic of the younger granite in the Oxford House Area, and of the late pre-Huronian and Huronian granites of the Lake Superior region. This variety is malacon, a form of zircon with relatively low refringence, weak birefringence and a dirty, altered appearance. 1968 I. Kostov Mineral. 11. v. 294 Malacon is a metamict zircon. This entry has been updated (OED Third Edition, June 2000; most recently modified version published online March 2022). < n.1854
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