英文字典中文字典


英文字典中文字典51ZiDian.com



中文字典辞典   英文字典 a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z       







请输入英文单字，中文词皆可：

安装中文字典英文字典查询工具!


中文字典英文字典工具:
选择颜色:
输入中英文单字

































































英文字典中文字典相关资料:


  • Tridymite - Wikipedia
    Tridymite is a high-temperature polymorph of silica and usually occurs as minute tabular white or colorless pseudo-hexagonal crystals, or scales, in cavities in felsic volcanic rocks Its chemical formula is Si O 2 Tridymite was first described in 1868 and the type location is in Hidalgo, Mexico
  • Tridymite: Mineral information, data and localities. - mindat. org
    From the Greek "Tridymos", triplet, alluding to its common twinning as trillings Tridymite is a low pressure, mostly high-temperature-stable polymorph of silica that can also form or persist metastably at low temperatures
  • Tridymite | Silica polymorph, High-temperature form, Hexagonal crystals . . .
    Tridymite forms thin hexagonal plates that are generally twinned, often in groups of three; its name alludes to this habit It commonly occurs in igneous rocks, more abundantly than cristobalite, as in the trachytes of Rhineland-Palatinate, Germany; northern Italy; and in the Massif Central, France
  • Tridymite - an overview | ScienceDirect Topics
    Tridymite and cristobalite are high-temperature, low-pressure polymorphs of silica, forming stably above 870°C (tridymite) and 1470°C (cristobalite) You might find these chapters and articles relevant to this topic
  • TRIDYMITE (Silicon Dioxide) - Amethyst Galleries
    Tridymite is a polymorph of quartz, meaning that it is composed of the same chemistry, SiO 2, but has a different structure Both quartz and tridymite are polymorphs with all the members of the Quartz Group which also include coesite, cristobalite and stishovite
  • Tridymite Mineral Data
    Comments: Clear, pseudohexagonal crystals of tridymite on matrix Location: Bellerberg quarry, Laacher See, Rhineland-Palatinate, Germany Scale: Not Given Colorless, White, Yellowish white, Gray Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments Platy - Sheet forms (e g micas)
  • The Mineral tridymite - The Mineral and Gemstone Kingdom
    Detailed properties, locality information guide about the mineral tridymite (quartz polymorph)
  • 40 Facts About Tridymite
    Tridymite is a fascinating mineral that belongs to the silica group It is one of the polymorphs of silicon dioxide (SiO₂), meaning it shares the same chemical composition as quartz but has a different crystal structure Let's dive into some intriguing facts about this unique mineral
  • Molecular dynamics study of tridymite - PMC
    Polymorphic structural changes in tridymite have been investigated by molecular dynamics simulation The main polymorphic transitions were reproduced and their mechanisms are explained Keywords: silica, tridymite, molecular dynamics, structure, phase transitions, polymorphs
  • Tridymite SiO2 - Handbook of Mineralogy
    tridymite is formed between 870± C and 1470±C; a number of stacking polytypes are known, especially non-terrestrial Occurrence: Deposited from hot gases in vesicles and lithophysae; as phenocrysts in felsic volcanic rocks, and less commonly, in basalts; in contact metamorphosed sandstone





中文字典-英文字典  2005-2009