Baddeleyite (English spelling)

Japanese: バデレアイト(英語表記)baddeleyite
Baddeleyite (English spelling)
Mineral name. Chemical composition: ZrO 2 . Monoclinic columnar or table-shaped crystals. Usually twinned. Completely cleaved at {001}. Colorless and transparent, but brown to black due to the presence of trace elements. Mohs hardness: 6.5, specific gravity: 5.8. High melting point of 2715°C, low thermal conductivity. High refractive index of 2.1 or more. Transforms to tetragonal at 1 atmosphere and about 1100°C, reducing volume. Zirconium (Zr) is more abundant in the earth's crust than copper, but it is commonly produced as zircon (ZrSiO 4) , and baddeleyite is an extremely rare mineral.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:
鉱物名。化学組成ZrO2。単斜晶系で柱状・卓状結晶。通常は双晶になっている。{001}でへき開完全。無色透明であるが,微量成分の存在で褐色~黒色を呈する。モース硬度6.5,比重5.8。2715℃の高融点を有し,熱伝導度は小さい。屈折率は2.1以上と高い。1気圧,約1100℃で正方晶系に変態し,体積が減少する。ジルコニウムZrの地殻存在度は銅より多いが,ジルコンZrSiO4として一般に産出し,バデレアイトは非常にまれな鉱物である。

出典 株式会社平凡社世界大百科事典 第2版について 情報

<<:  Paderewski

>>:  Hateruma Island

Recommend

Syrians

…In an age when Christianity was gaining influenc...

N-Bromosuccinimide - Bromosuccinimide

1-bromo-2,5-pyrrolidinedione. C 4 H 4 NO 2 Br (17...

Asana (English spelling) āsana

A term in Indian philosophy. A sitting position. O...

Rodin (English spelling) François Auguste René Rodin

French sculptor. Known as the greatest modern scu...

"Two colors of Edo" - Edo Nishiki

...Ihara Saikaku's "Danshoku Taikan,&quo...

Xochimilco (English spelling)

Xochimilco is the administrative center of the Xoc...

Superovulation - No superovulation

…The number of pups produced in one litter of rat...

Tales of the Handan Provinces - Simple Tales

A collection of 20 stories. Written by Ryutei Tane...

Fujiyoshi Tarui

A radical civil rights thinker and Greater Asiani...

Magnetic relaxation

A phenomenon in which a time delay occurs before t...

Detonating fuse (English spelling)

A linear pyrotechnic consisting of a core charge ...

parasitic castration

…In the old days, a castrated male horse was call...

Sinker - Ashina

…Generally, each one is small and many of them ar...

Anigothanthus manglesii (English spelling)

… [Mitsuru Hotta]... *Some of the terminology tha...

Kuroji (black bunting) - Kuroji (English spelling) gray bunting

A passerine bird of the Emberizidae family. It is ...