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Ammonium paratungstate (or APT) is a
white crystalline salt with the
chemical formula (NH4)10(H2W12O42)·4H2O. It is
described as "the most
important raw...
- In chemistry,
paratungstate refers to the
anion with the
formula [W12O42]12- and
salts derived from this anion. The term also
refers to
protonated derivatives...
- Na2W2O7, Li2W2O7 and Ag2W2O7 [W7O24]6− (
paratungstate A) [W10O32]4− (tungstate Y) [H2W12O42]10− (
paratungstate B) α-[H2W12O40]6− (metatungstate) β-[H2W12O40]6−...
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yields the soluble,
metastable "
paratungstate A" anion, W 7O6− 24,
which over time
converts to the less
soluble "
paratungstate B" anion, H 2W 12O10− 42. Further...
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Another common way to
synthesize WO3 is by
calcination of
ammonium paratungstate (APT)
under oxidizing conditions: (NH4)10[H2W12O42] · 4 H2O → 12 WO3...
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Arbitrage pricing theory, a
general theory of ****et
pricing Ammonium paratungstate, a tungsten-based
chemical compound Atom-probe tomography, an atomic-resolution...
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including [H2W12O40]6-. The
unprotonated anion [W12O40]12- has Td symmetry.
Paratungstate [W12O42]12-, with
idealized C2h symmetry. Asami, M.; Ichida, H.; Sasaki...
- Line
drawing of
disodium decavanadate, V10O6−28
Paratungstate B, also
called dihydrogen paratungstate, H2W12O10−42 Mo36-polymolybdate, Mo36O112(H2O)8−16...
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tungsten powder.
Tungsten ore
concentrates are
processed into
ammonium paratungstate (APT) and then into
tungsten metal powder,
tungsten carbide and ready-to-press...
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component of the ore
would be
refined into an
intermediate product ammonium paratungstate (APT) for shipment. Five
hundred fifty seven thousand metric ton units...
