About: Zirconium tungstate

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Zirconium tungstate (ZrWO4) is the zirconium salt of tungstic acid and has unusual properties. The phase formed at ambient pressure by reaction of ZrO2 and WO3 is a metastable cubic phase, which has negative thermal expansion characteristics, namely it shrinks over a wide range of temperatures when heated. In contrast to most other ceramics exhibiting negative CTE (coefficient of thermal expansion), the CTE of ZrW2O8 is isotropic and has a large negative magnitude (average CTE of -7.2x10−6K−1) over a wide range of temperature (-273 °C to 777 °C). A number of other phases are formed at high pressures.

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rdf:type	Thing dul:ChemicalObject chemical substance Chemical compound yago:WikicatTungstates yago:WikicatTungstenCompounds yago:WikicatOxygenCompounds yago:Abstraction100002137 yago:Chemical114806838 yago:Cognition100023271 yago:Compound105870180 yago:Compound114818238 yago:Concept105835747 yago:Content105809192 yago:Idea105833840 yago:InorganicCompound114919511 yago:Material114580897 yago:Matter100020827 yago:Part113809207 yago:PhysicalEntity100001930 yago:PsychologicalFeature100023100 yago:Relation100031921 yago:WikicatInorganicCompounds yago:WikicatZirconiumCompounds chemical compound yago:Salt115010703 yago:Substance100019613 yago:Tungstate115081957 yago:Whole105869584 umbel-rc:ChemicalSubstanceType
rdfs:label	Tungstat de zirconi(IV) (ca) Zirconiumwolframat (de) Zirkoniovolframato (eo) Tungstate de zirconium (fr) タングステン酸ジルコニウム (ja) Zirconium tungstate (en) 钨酸锆 (zh)
rdfs:comment	El tungstat de zirconi(IV) o wolframat de zirconi(IV) és un compost inorgànic, del grup de les sals, que està constituït per anions o wolframat i cations zirconi (4+) , la qual fórmula química és . Es tracta d'un compost rar perquè en augmentar la temperatura es contreu quan la gran majoria de les substàncies es dilaten. (ca) Zirconiumwolframat (Zr[WO4]2) ist eine chemische Verbindung aus Zirconium, Wolfram und Sauerstoff und damit eine Verbindung aus der Gruppe der Wolframate. (de) Zirkoniovolframato (Zr[WO4]2) estas kemia kombinaĵo el la elementoj zirkonio, volframo kaj oksigeno. (eo) Zirconium tungstate (ZrWO4) is the zirconium salt of tungstic acid and has unusual properties. The phase formed at ambient pressure by reaction of ZrO2 and WO3 is a metastable cubic phase, which has negative thermal expansion characteristics, namely it shrinks over a wide range of temperatures when heated. In contrast to most other ceramics exhibiting negative CTE (coefficient of thermal expansion), the CTE of ZrW2O8 is isotropic and has a large negative magnitude (average CTE of -7.2x10−6K−1) over a wide range of temperature (-273 °C to 777 °C). A number of other phases are formed at high pressures. (en) タングステン酸ジルコニウム（タングステンさんジルコニウム、英: Zirconium Tungstate, Zr(WO4)2, ZrW2O8）は、金属酸化物の一つであり、いくつかの珍しい物性をもつ。常圧で ZrO2 と WO3 を反応させて生じる相は準安定な立方晶相であり、「負の熱膨張材料」である。すなわち、広い温度範囲において熱すると膨張するのではなく収縮する。ZrW2O8 の熱膨張率は等方的かつ広い温度範囲 (−273〜777 °C) において絶対値が大きく（平均膨張率 −7.2×10−6 K−1）、他の負の熱膨張率を示すセラミックスのほとんどとは対照的である。高圧下では他にも様々な相が生じる。 (ja) 钨酸锆是一种无机化合物，化学式为Zr(WO4)2。通过常压下二氧化锆和三氧化钨反应，可以得到立方晶系的钨酸锆。它有“热缩冷胀”的性质。而在高压下，它会发生相变，先变为无定形体，再转变为U3O8型，其中锆和钨的原子无序排列。 (zh) Le tungstate de zirconium est un composé chimique de formule Zr(WO4)2. Il se présente comme un solide inodore ayant la propriété remarquable d'avoir un coefficient de dilatation thermique négatif, c'est-à-dire qu'il se contracte en chauffant. Contrairement aux autres céramiques ayant un coefficient de dilatation thermique négatif, celui du tungstate de zirconium est isotrope et a une valeur absolue élevée, de l'ordre de −7,2 × 10−6 K−1, dans une large gamme de température, de 0,3 à 1 050 K. ZrO2 + 2 WO3 ⟶ Zr(WO4)2. (fr)
foaf:name	Zirconium(IV) tungstate (en)
name	Zirconium tungstate (en)
foaf:depiction
dct:subject	Tungstates Zirconium(IV) compounds Inorganic compounds
Wikipage page ID	1285648 (xsd:integer)
Wikipage revision ID	1093790879 (xsd:integer)
Link from a Wikipage to another Wikipage	Tungstates Phase (matter) Zirconium(IV) compounds Chemical bond Chemical synthesis Octahedra Octahedral Phase transitions Angstrom Stoichiometric Zirconium Tungstic acid Amorphous Bravais lattice Oxides Oxygen Tungsten Thermodynamics Temperature Rigid Unit Modes Inorganic compounds High pressure Phase transition Space group Metastable Negative thermal expansion Room temperature Tetrahedral Cubic (crystal system) NaCl structure Normal modes Unstable Tungsten oxide Zirconia Cubic phase Triuranium octaoxide
Link from a Wikipage to an external page	http://www.livescience.com/technology/041215_unusual_material.html https://web.archive.org/web/20100201192127/http:/www.espi-metals.com/msds's/zirconiumtungstate.pdf
sameAs	Zirconium tungstate Zirconium tungstate Zirconium tungstate Zirconium tungstate

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