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:

platina    
n. 白金;铂

白金;铂

Platina \Plat"i*na\, n. [Sp. or NL. See {Platinum}.] (Chem.)
Platinum.
[1913 Webster]

{Platina mohr}, platinum black.

{Platina yellow}, a pigment prepared from platinum.
[1913 Webster]


Platinum \Plat"i*num\, n. [NL., fr. Sp. platina, from plata
silver, LL. plata a thin plate of metal. See {Plate}, and cf.
{Platina}.] (Chem.)
A metallic element of atomic number 78, one of the noble
metals, classed with silver and gold as a precious metal,
occurring native or alloyed with other metals and also as the
platinum arsenide (sperrylite). It is a heavy tin-white metal
which is ductile and malleable, but very infusible (melting
point 1772[deg] C), and characterized by its resistance to
strong chemical reagents. It is used for crucibles in
laboratory operations, as a catalyst, in jewelry, for stills
for sulphuric acid, rarely for coin, and in the form of foil
and wire for many purposes. Specific gravity 21.5. Atomic
weight 195.1. Symbol Pt. Formerly called {platina}.
[1913 Webster PJC]

{Platinum black} (Chem.), a soft, dull black powder,
consisting of finely divided metallic platinum obtained by
reduction and precipitation from its solutions. It absorbs
oxygen to a high degree, and is employed as an oxidizer.


{Platinum lamp} (Elec.), a kind of incandescent lamp of which
the luminous medium is platinum. See under {Incandescent}.


{Platinum metals} (Chem.), the group of metallic elements
which in their chemical and physical properties resemble
platinum. These consist of the light platinum group, viz.,
rhodium, ruthenium, and palladium, whose specific
gravities are about 12; and the heavy platinum group,
viz., osmium, iridium, and platinum, whose specific
gravities are over 21.

{Platinum sponge} (Chem.), metallic platinum in a gray,
porous, spongy form, obtained by reducing the double
chloride of platinum and ammonium. It absorbs oxygen,
hydrogen, and certain other gases, to a high degree, and
is employed as an agent in oxidizing.
[1913 Webster]


请选择你想看的字典辞典:
单词字典翻译
Platina查看 Platina 在百度字典中的解释百度英翻中〔查看〕
Platina查看 Platina 在Google字典中的解释Google英翻中〔查看〕
Platina查看 Platina 在Yahoo字典中的解释Yahoo英翻中〔查看〕





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:


  • Platinum - Wikipedia
    Platinum is a chemical element; it has symbol Pt and atomic number 78 It is a dense, malleable, ductile, highly unreactive, precious, silverish-white transition metal Its name originates from Spanish platina, a diminutive of plata "silver" [7][8]
  • Bajaj Platina Price, 2025 Platina Models, Images, Colours, Mileage . . .
    The Bajaj Platina is a brand of bikes made by Bajaj two wheeler manufacturer in India There are 2 Platina models on offer with price starting from Rs 69,001 (avg Ex-showroom) The cheapest model under the series is Bajaj Platina 100 with 102cc engine generating 7 79 bhp of power
  • Platinum | Color, Symbol, Uses, Facts | Britannica
    Platinum, chemical element, the best known and most widely used of the six platinum metals A very heavy, precious, silver-white metal, platinum is soft and ductile and has a high melting point and good resistance to corrosion and chemical attack Learn more about platinum in this article
  • Platinum Price Today | Price of Platinum Per Ounce - KITCO
    Live Platinum Charts and Platinum Spot Price from International Platinum Markets, Prices from New York, London, Hong Kong and Sydney provided by Kitco
  • Properties, Uses, Occurrence and Localities - Geology Science
    Platinum is a precious metal that is known for its rarity, beauty, and various industrial applications It is a chemical element with the symbol Pt and atomic number 78 on the periodic table
  • Platina – Wikipedija
    Platina je skupocjeniji element od zlata ili srebra Posjeduje veliku otpornost na kemijske utjecaje, odlične visoko-temperaturne karakteristike i stabilna električna svojstva
  • Platinum: Whats So Special About the Shiny Metal?
    Platinum is coveted for its rarity, resilience and versatility Its scarcity makes the noble metal exclusive and valuable, while its resistance to corrosion and ability to withstand extreme conditions make it ideal for various industries
  • Platinum - Element information, properties and uses | Periodic Table
    Platinum is very effective at converting emissions from the vehicle’s engine into less harmful waste products Platinum is used in the chemicals industry as a catalyst for the production of nitric acid, silicone and benzene It is also used as a catalyst to improve the efficiency of fuel cells
  • Platinum: Mineral information, data and localities.
    From Spanish "platina", diminutive of "plata", silver The new metal found in large placer deposits during the sixteenth-century Spanish conquest of South America was called "platina del Pinto" after the Rio Pinto, Colombia
  • The Ultimate Guide to Platinum: Properties, Uses, and Applications
    Learn about its historical discovery, vital physical and chemical properties, and its wide-ranging applications in industries from automotive to healthcare Understand the enduring allure and value of this once 'worthless' precious metal - Platinum is a precious, silver-white metal, renowned for its rarity and high market value





中文字典-英文字典  2005-2009