aeschyniten.

Brit.

/ˈɛskᵻnʌɪt/, U.S.

/ˈɛskəˌnaɪt/

Forms: 1800s– aeschynite, 1800s– eschynite (chiefly U.S.).

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

Etymology: < German Aeschynit ( Jahresbericht über die Fortschritte der physischen Wissenschaften 1829 (1830) 196) < Swedish äschynit ( J. J. Berzelius Årsberättelse om framstegen i physik och chemie (1829) 193) < ancient Greek αἰσχύνη shame, dishonour, disgrace ( < αἰσχύνειν to dishonour: see aeschynomenous adj.) + Swedish -it -ite suffix¹. The mineral is so named in allusion to the inability of chemical science, at the time of the discovery of the mineral, to isolate some of its constituents.

Mineralogy.

A dark brown rock-forming mineral containing cerium, titanium, and niobium; now also more fully aeschynite-(Ce). Also: either of two related minerals, in which cerium and calcium are replaced either by yttrium, erbium, and calcium (more fully aeschynite-(Y)), or else by neodymium and cerium (more fully aeschynite-(Nd)).Aeschynite is an oxide and hydroxide of several elements with the basic formula AB₂(O,OH)₆, where A is one or more rare earth elements, calcium, ferrous iron, and thallium, and B is titanium and niobium. An older name for aeschynite-(Y) is priorite n. Crystal system: orthorhombic, but the mineral is usually metamict in its natural state.

ΚΠ

1830 Edinb. Jrnl. Sci. 3 28 Berzelius has given it the name Aeschynite.

1833 Rep. 1st & 2nd Meetings Brit. Assoc. Advancem. Sci. 1831–2 324 If we were to give this name to all the minerals of which the chemist cannot tell us the exact constitution, eschynite would be large family instead of a single species.

1892 E. S. Dana J. D. Dana's Syst. Mineral. (ed. 6) 743 The axial ratios of polymignite and æschynite are closely similar.

1944 C. Palache et al. Dana's Syst. Mineral. (ed. 7) I. 796 Eschynite is found in nepheline syenite and in the nepheline-free miascite..at Miask, in the Ilmen Mountains.

1966 A. A. Levinson in Amer. Mineralogist 51 153 (table) Aeschynite-(Ce). Aeschynite-(Nd). Aeschynite-(Y)... Whenever the rare-earth element distribution has been determined for a rare-earth mineral, the chemical symbol for the predominant rare-earth element is appended (by means of a hyphen), in parenthesis, to the group name; this results in a species name.

1994 R. E. Bevins Mineral. Wales 31/1 The exact species present in Snowdonia has yet to be determined, although as the heavy rare earth elements are dominant it is likely to be aeschynite-(Y).

1995 Zhang Peishan et al. Mineral. & Geol. Rare Earths China v. 74 The aeschynite-(Ce) found in Guposhan is rich in Ta.

2001 European Jrnl. Mineral. 13 1207/1 Aeschynite minerals..are widespread and among the main niobium source minerals in the giant Bavan Obo..ore deposit, Inner Mongolia.

This entry has been updated (OED Third Edition, December 2011; most recently modified version published online December 2021).

单词	aeschynite
释义	aeschyniten. Brit. /ˈɛskᵻnʌɪt/, U.S. /ˈɛskəˌnaɪt/ Forms: 1800s– aeschynite, 1800s– eschynite (chiefly U.S.). Origin: A borrowing from German. Etymon: German Aeschynit. Etymology: < German Aeschynit ( Jahresbericht über die Fortschritte der physischen Wissenschaften 1829 (1830) 196) < Swedish äschynit ( J. J. Berzelius Årsberättelse om framstegen i physik och chemie (1829) 193) < ancient Greek αἰσχύνη shame, dishonour, disgrace ( < αἰσχύνειν to dishonour: see aeschynomenous adj.) + Swedish -it -ite suffix¹. The mineral is so named in allusion to the inability of chemical science, at the time of the discovery of the mineral, to isolate some of its constituents. Mineralogy. A dark brown rock-forming mineral containing cerium, titanium, and niobium; now also more fully aeschynite-(Ce). Also: either of two related minerals, in which cerium and calcium are replaced either by yttrium, erbium, and calcium (more fully aeschynite-(Y)), or else by neodymium and cerium (more fully aeschynite-(Nd)).Aeschynite is an oxide and hydroxide of several elements with the basic formula AB₂(O,OH)₆, where A is one or more rare earth elements, calcium, ferrous iron, and thallium, and B is titanium and niobium. An older name for aeschynite-(Y) is priorite n. Crystal system: orthorhombic, but the mineral is usually metamict in its natural state. ΚΠ 1830 Edinb. Jrnl. Sci. 3 28 Berzelius has given it the name Aeschynite. 1833 Rep. 1st & 2nd Meetings Brit. Assoc. Advancem. Sci. 1831–2 324 If we were to give this name to all the minerals of which the chemist cannot tell us the exact constitution, eschynite would be large family instead of a single species. 1892 E. S. Dana J. D. Dana's Syst. Mineral. (ed. 6) 743 The axial ratios of polymignite and æschynite are closely similar. 1944 C. Palache et al. Dana's Syst. Mineral. (ed. 7) I. 796 Eschynite is found in nepheline syenite and in the nepheline-free miascite..at Miask, in the Ilmen Mountains. 1966 A. A. Levinson in Amer. Mineralogist 51 153 (table) Aeschynite-(Ce). Aeschynite-(Nd). Aeschynite-(Y)... Whenever the rare-earth element distribution has been determined for a rare-earth mineral, the chemical symbol for the predominant rare-earth element is appended (by means of a hyphen), in parenthesis, to the group name; this results in a species name. 1994 R. E. Bevins Mineral. Wales 31/1 The exact species present in Snowdonia has yet to be determined, although as the heavy rare earth elements are dominant it is likely to be aeschynite-(Y). 1995 Zhang Peishan et al. Mineral. & Geol. Rare Earths China v. 74 The aeschynite-(Ce) found in Guposhan is rich in Ta. 2001 European Jrnl. Mineral. 13 1207/1 Aeschynite minerals..are widespread and among the main niobium source minerals in the giant Bavan Obo..ore deposit, Inner Mongolia. This entry has been updated (OED Third Edition, December 2011; most recently modified version published online December 2021). < n.1830
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