翻訳と辞書
Words near each other
・ Diophantine approximation
・ Diophantine equation
・ Diophantine geometry
・ Diophantine quintuple
・ Diophantine set
・ Diophantus
・ Diophantus (crater)
・ Diophantus (general)
・ Diophantus II.VIII
・ Diophila
・ Diophila bathrota
・ Diophila claricoma
・ Diopisthoporus
・ Diopside
・ Diopsoidea
Dioptase
・ Diopter (disambiguation)
・ Diopter sight
・ Dioptinae
・ Dioptis
・ Dioptis aeliana
・ Dioptis angustifascia
・ Dioptis areolata
・ Dioptis beckeri
・ Dioptis butes
・ Dioptis candelaria
・ Dioptis charila
・ Dioptis charon
・ Dioptis cheledonis
・ Dioptis chloris


Dictionary Lists
翻訳と辞書 辞書検索 [ 開発暫定版 ]
スポンサード リンク

Dioptase : ウィキペディア英語版
Dioptase

Dioptase is an intense emerald-green to bluish-green copper cyclosilicate mineral. It is transparent to translucent. Its luster is vitreous to sub-adamantine. Its formula is CuSiO3·H2O (also reported as CuSiO2(OH)2). It has a hardness of 5, the same as tooth enamel. Its specific gravity is 3.28–3.35, and it has two perfect and one very good cleavage directions. Additionally, dioptase is very fragile and specimens must be handled with great care. It is a trigonal mineral, forming 6-sided crystals that are terminated by rhombohedra.
==History==

Dioptase was used to highlight the edges of the eyes on the three Pre-Pottery Neolithic B lime plaster statues discovered at 'Ain Ghazal known as Micah, Heifa and Noah.These sculptures date back to about 7200BC.〔
Late in the 18th century, copper miners at the Altyn-Tyube (Altyn-Tube) mine, Karagandy Province, Kazakhstan〔 thought they found the emerald deposit of their dreams. They found fantastic cavities in quartz veins in a limestone, filled with thousands of lustrous emerald-green transparent crystals. The crystals were dispatched to Moscow, Russia for analysis. However the mineral's inferior hardness of 5 compared with emerald's greater hardness of 8 easily distinguished it. Later Fr. René Just Haüy (the famed French mineralogist) in 1797 determined that the enigmatic Altyn-Tyube mineral was new to science and named it dioptase (Greek, ''dia'', "through" and ''optos'', "visible"), alluding to the mineral's two cleavage directions that are visible inside unbroken crystals.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Dioptase」の詳細全文を読む



スポンサード リンク
翻訳と辞書 : 翻訳のためのインターネットリソース

Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.