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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]


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  • [Platina] Jewelry Casting: Platinum,Gold,Silver Casting
    Since opening its doors to the Jewelry trade in 1995 Platina has become a premier destination for precious metals casting, successfully servicing hundreds of jewelry manufacturers, designers and retailers nationwide
  • 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" [13][14]
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    The 2026 Bajaj Platina 100 is a commuter motorcycle that has been designed to offer a comfortable, fuel-efficient, and reliable ride for daily commutes It features a refreshed design with a new front fascia, LED DRLs, and stylish graphics
  • PLATINA Definition Meaning - Merriam-Webster
    The meaning of PLATINA is platinum
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    Bajaj Platina 100 ex-showroom price in Delhi starts at Rs 65,897 Check the key specs, features of Platina 100 and on-road price in your city Also explore all the 1 variants to know available choices in colours, disk drum breaks
  • Platinum - Wikiwand
    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"
  • Bajaj Platina - Wikipedia
    The engine of Platina is from another 100 cc bike from Bajaj, the Bajaj CT 100 but with a new Bajaj technology, ExhausTec It has one of the best 100cc engines which is very frugal and feels less stressed on high speeds than other bikes in the segment
  • Bajaj Platina 100 Bike 2026 - Price, Specs, Images, Mileage
    Exchange your old bike for a new Bajaj motorcycle and ride home with confidence Bajaj Platina 100 is powered by a 102cc engine, offering excellent mileage, and hassle-free performance Available in 4 colors, with price starting from ₹ 68 890 -





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