barium tungstate

• 分子结构分类: 无机化合物 - 混合金属/非金属化合物 - 碱土金属氧阴离子化合物
• 英文名称: barium tungstate
• 英文别名: barium(2+);dioxido(dioxo)tungsten
• 化学式: Ba*O₄W
• 分子量: 385.178
• InChiKey: SJPVUFMOBDBTHQ-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -3.0
• 重原子数：
  6
• 可旋转键数：
  0
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.0
• 拓扑面积：
  80.3
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  barium tungstate 以 melt 为溶剂， 生成 钨
  参考文献：
  名称：

  Weiss, L.; Martin, A., Zeitschrift fur anorganische Chemie, 1910, vol. 65, p. 314

  摘要：

  DOI：
• 作为产物：
  描述：

  以 neat (no solvent) 为溶剂， 生成 barium tungstate
  参考文献：
  名称：

  Combining Second-Order Jahn−Teller Distorted Cations to Create Highly Efficient SHG Materials:  Synthesis, Characterization, and NLO Properties of BaTeM₂O₉ (M = Mo⁶⁺ or W⁶⁺)

  摘要：

  Two new oxides, BaTeMo2O9 and BaTeW2O9, have been synthesized, by standard solid-state techniques, that have strong SHG intensities of approximately 600 x SiO2, on the order of LiNbO3. Both materials contain cations susceptible to second-order Jahn-Teller (SOJT) distortions, resulting in asymmetric coordination environments. The SOJT distortion polarizes the M6+-O and Te4+-O bonds. Equally importantly, these polarizations constructively add, resulting in the large SHG responses. Powder SHG measurements on BaTeM2O9 (M = Mo6+ or W6+) indicated that both materials are phase-matchable and have a deffexp of 28 and 22 pm/V, respectively. Using bond hyperpolarizability values (beta's) of 130 x 10-40 and 305 x 10-40 m4/V for Te4+-O and Mo6+-O respectively, we calculate a deffcalc of 20pm/V for BaTeMo2O9. In addition, through the powder SHG measurements, we are able to give a more reasonable value for beta(W6+-O), 230 x 10-40 m4/V. This value is consistent with the smaller polarizability and magnitude of the intra-octahedral distortion of W6+ compared with Mo6+.

  DOI：

  10.1021/ja035314b
• 作为试剂：
  描述：

  2-(benzotriazol-1-yl)acetophenone 在 barium tungstate 作用下， 以45%的产率得到7H-dibenzo[b,d]azepin-7-one
  参考文献：
  名称：

  Mixed Oxides as Highly Selective Catalysts for the Flash Pyrolysis of Phenacyl Benzotriazole: One-Pot Synthesis of Dibenzazepin-7-one

  摘要：

  The one-pot synthesis of dibenzo[b,d]azepin-7-one (3) was selectively achieved from 1-phenacyl-1,2,3-benzotriazole (1) using the catalytic flash vacuum pyrolysis (cfvp) methodology. Catalysts with the scheelite structure ABO(4) (A = Ca2+, Sr2+, Ba2+ and B = Mo6+, W6+) and fergusonite BiVO4 were explored in this new catalytic reaction. These oxides promoted high conversion of starting material at lower temperatures than those observed for noncatalytic reactions. The chemical nature of A and B cations in the scheelite structure showed a strong influence on the formation toward the desired azepinone. In addition, the catalyst's morphology had a significant influence on the course of the cfvp reaction.

  DOI：

  10.1021/cs3008335

文献信息

• Structure and calorimetric study of complex oxides based on lanthanum, tungsten, and alkaline earth elements MeLa2WO7 (Me = Mg, Ca, Sr, Ba)
  作者：Mira R. Bissengaliyeva、Ramazan M. Zhakupov、Alexander V. Knyazev、Daniil B. Gogol、Shynar T. Taimassova、Bakhyt K. Balbekova、Nuraly S. Bekturganov

  DOI：10.1007/s10973-020-09315-5

  日期：2020.12

  general formula MeLa2WO7 (Me = Mg, Ca, Sr, Ba). The structure of the samples obtained was studied by the X-ray diffraction, electron probe, and X-ray spectral microanalysis; the infrared and Raman spectra of the compounds were obtained. The results of indexing for SrLa2WO7 and BaLa2WO7 are in good agreement with the previously published crystallographic data. The heat capacity of the samples was measured

  通过“溶胶-凝胶”法合成柠檬酸盐，我们得到了通式为MeLa2WO7（Me = Mg、Ca、Sr、Ba）的镧、钨和碱土元素的三元氧化物样品。通过X射线衍射、电子探针和X射线光谱显微分析对所得样品的结构进行了研究；获得了化合物的红外光谱和拉曼光谱。SrLa2WO7 和 BaLa2WO7 的索引结果与先前公布的晶体学数据非常吻合。采用绝热量热法测量样品的热容，计算其热力学函数。
• Low-temperature induced phase transitions in BaWO4:Er3+ microcrystals: A Raman scattering study
  作者：I.P. Carvalho、R.B. Sousa、J.M.E. Matos、J.V.B. Moura、P.T.C. Freire、G.S. Pinheiro、C. Luz-Lima

  DOI：10.1016/j.molstruc.2019.127498

  日期：2020.3

  in the range of 123–293 K, and their Raman spectra were collected to observe the structural changes induced by Er doping. We observed that at low temperatures, there was no indication of phase transition for pure tungstate (BaWO4); however, for doped tungstates, changes were observed in the Raman spectra, showing an unexpected structural phase transition.

  摘要 近几十年来，稀土掺杂钨酸钡的合成由于材料具有吸引力的电学和光学性质而有所增加。在这项研究中，掺铒钨酸钡是通过共沉淀法合成的，具有三种不同的浓度：Ba(1-x)ErxWO4（其中 x = 0.00、0.01 和 0.02）。通过 X 射线衍射 (XRD)、拉曼和傅里叶变换红外 (FT-IR) 光谱、扫描电子显微镜 (SEM) 和能量色散 X 射线光谱 (EDS) 对材料进行表征。随后，样品经受123-293 K范围内的温度变化，并收集它们的拉曼光谱以观察Er掺杂引起的结构变化。我们观察到，在低温下，纯钨酸盐 (BaWO4) 没有相变迹象；然而，
• Zum Chemischer Transport ternärer Übergangsmetall- und Erdalkaliwolframate MWO4 mit Chlor
  作者：Udo Steiner

  DOI：10.1002/zaac.200500095

  日期：2005.7

  On the Chemical Vapor Transport of Ternary Transition Metal- and Earth Alkaline Tungstates MWO4 with Chlorine The chemical vapor transport of transition metal tungstates MWO4 (M=Mn, Co, Ni, Cu, Zn, Cd) was investigated in dependence on mean transport temperature (923 K to 1223 K) and amount of transport agent Cl2. All tungstates migrate in a temperature gradient ΔT = 100 K from the region of higher

  关于三元过渡金属和地球碱性钨酸盐 MWO4 与氯的化学蒸汽传输研究了过渡金属钨酸盐 MWO4（M=Mn、Co、Ni、Cu、Zn、Cd）的化学蒸汽传输与平均传输温度的关系（ 923 K 至 1223 K) 和运输剂 Cl2 的量。根据实验条件，所有钨酸盐以 ΔT = 100 K 的温度梯度从较高温度区域迁移到较低温度区域，迁移速率为 0.5 至 8 mg/h。通过在传输实验期间连续测量质量变化来确定传输行为。将结果与热化学计算进行比较，并详细讨论了水分含量的影响。MgWO4 在 Cl2 的影响下以 1273 K 至 1173 K 的温度梯度迁移（迁移速率 0.7 mg/h），
• Incorporation of Europium(III) into Scheelite-Related Host Matrixes ABO₄ (A = Ca²⁺, Sr²⁺, Ba²⁺; B = W⁶⁺, Mo⁶⁺): Role of A and B Sites on the Dopant Site Distribution and Photoluminescence
  作者：Bin Xiao、Moritz Schmidt

  DOI：10.1021/acs.inorgchem.7b02211

  日期：2017.12.18

  that the local coordination environment of Eu3+ in WO42– materials is more symmetrical than in their isostructural MoO42– counterparts. The detailed spectroscopic interpretation conducted in this study resolves the relation between local distortion around a dopant and the host phase cations in structural disordered materials and may give novel insights with respect to rational design and tailoring of

  掺有三价镧系元素或act系元素的白钨矿和坡缕石相关材料由于其在矿物学，技术和环境方面的重要作用而受到广泛研究。这些固溶体的详细结构知识对于理解其理化性质和预测材料性质至关重要。在这项工作中，我们通过偏振相关的定点时间分辨激光诱导荧光光谱法进行了全面的光谱分析，以基于通式描述了一系列白钨矿型基质对基质相阳离子的影响。 ABO 4（A = Ca 2 +，Sr 2 +，Ba 2+ ; B = W 6+，Mo6+）在Eu 3+掺杂剂的局部环境中。Eu 3+已被用作发光探针，以进入适合于三价镧系元素或act系元素占据的晶体取代位点的局部结构环境。我们的结果表明，晶格畸变总体上较小，但是随着主体和客体阳离子尺寸的不匹配增加而增加。我们观察到Eu 3+的激发能与基质阳离子大小和A–O键距离的线性关系，这可以用来确定迄今未知的NaEu（WO 4）2中Eu–O键距离。确定的值为2.510Å，比先前报道的NaEu（MoO
• Raman studies of A₂MWO₆ tungstate double perovskites
  作者：R. L. Andrews、A. M. Heyns、P. M. Woodward

  DOI：10.1039/c4dt03789h

  日期：——

  The Raman spectra of A₂MWO₆ double perovskites with various symmetries have been studied.

  翻译结果：研究了具有不同对称性的A2MWO6双钙钛矿的拉曼光谱。