钨酸钙，别名“人造白钨”，白色粉末，在X射线、电子束和紫外线激发下均是很有效的发光材料，是非常重要的化学原料。 主要用于生产仲钨酸铵、 三氧化钨 、钨铁、合金钢、硬质合金、钨材、钨丝及钨合金等钨制品。 用做钨系列化工产品的原料。 在分子式CaWO4中，W的化合价为+6。 [1] 性状：白色四方晶体，正方晶系结构。 溶解性：微溶于水、 氯化铵溶液，在热盐酸中分解。 [1] 接触钨化合物会使上呼吸道和深部呼吸道受到刺激，出现炎症。 对皮肤有刺激作用。 [1] 通常来 …

Scheelite is a calcium tungstate mineral with the chemical formula Ca W O 4. It is an important ore of tungsten (wolfram). Scheelite is originally named after Swedish chemist Carl Wilhelm Scheele (1742–1786). Well-formed crystals are sought by collectors and are occasionally fashioned into gemstones when suitably free of flaws.

CaWO4 is Zircon-like structured and crystallizes in the tetragonal I4_1/a space group. The structure is three-dimensional. Ca2+ is bonded in a 8-coordinate geometry to eight equivalent O2- atoms. There are four shorter (2.47 Å) and four longer (2.51 Å) Ca–O bond lengths. W6+ is bonded in a tetrahedral geometry to four equivalent O2- atoms.

2025年1月7日 · In this work, we have fabricated two-dimensional (2D) CaWO4 nanosheets from scheelite minerals via a straightforward ultrasonic exfoliation method and evaluated their efficacy as OER catalysts. Compared to scheelite powders, these 2D nanosheets exhibited superior crystallinity and a 1.26-fold increase in electrochemical surface area, promoting ...

2023年9月1日 · In this study, we present an ab initio investigation of the optical properties of CaWO 4. The crystal structure of the bulk material along with its vibrational (in the ground state) and optical properties (in both ground and excited states) were analyzed. Our simulations accurately identified the observed Raman signature of the material.

2005年4月15日 · 在 8-400K 的温度范围内研究了 CaWO4、CaMoO4 和 ZnWO4 闪烁晶体的发光光谱。 激发光子能量从紫外线 (4.5eV) 到硬 X 射线区域 (35keV) 不等。 发现随着激发能量的降低，低能发光带的相对强度（归因于 CaWO4 和 CaMoO4 晶体中缺陷中心的外在发射）增加。

2024年11月11日 · A continuous microfluidics synthesis of CaWO4 was conducted to obtain nanoparticles with a Scheelite structure approximately 10 nm in diameter. The CaWO4 nanoparticles were characterized using elemental composition, chemical structure, particle size distribution, and morphology.

CaWO4 crystallizes in the orthorhombic Cmce space group. The structure is three-dimensional. Ca2+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of Ca–O bond distances ranging from 2.40–2.69 Å. W6+ is bonded in a 6-coordinate geometry to six O2- atoms.

Calcium tungstate | Calcium tungstate (CaWO4) is an optical material, which can be used as a laser host material for a variety of electronic applications | CaWO4 can be used in the fabrication of a radio-sensitizer for cancer radiotherapy applications

2020年7月14日 · CaWO4 is Zircon-like structured and crystallizes in the tetragonal I4_1/a space group. The structure is three-dimensional. Ca2+ is bonded in a 8-coordinate geometry to eight equivalent O2- atoms. There are four shorter (2.47 Å) and four longer (2.51 Å) Ca–O bond lengths. W6+ is bonded in a tetrahedral geometry to four equivalent O2- atoms.