dieuropiumtrioxide
Europium(III) oxide
CAS: 1308-96-9
Molecular Formula: Eu2O3
dieuropiumtrioxide - Names and Identifiers
| Name | Europium(III) oxide |
| Synonyms | Europia europiumtrioxide oxygen(-2) anion dieuropiumtrioxide europiumsesquioxide europium(+3) cation Europium(III) oxide europiumoxide(eu2o3) EuropiumoxideREOrosepowder |
| CAS | 1308-96-9 |
| EINECS | 215-165-6 |
| InChI | InChI=1/2Eu.3O/rEu2O3/c3-1-5-2-4 |
| InChIKey | RSEIMSPAXMNYFJ-UHFFFAOYSA-N |
dieuropiumtrioxide - Physico-chemical Properties
| Molecular Formula | Eu2O3 |
| Molar Mass | 351.93 |
| Density | 7.42g/mLat 25°C(lit.) |
| Melting Point | 2291°C |
| Water Solubility | Soluble in acids. Insoluble in water. |
| Appearance | nanopowder |
| Specific Gravity | 7.42 |
| Color | White to slightly pink |
| Merck | 14,3904 |
| Storage Condition | no restrictions. |
| Sensitive | Hygroscopic |
| Physical and Chemical Properties | White powder with light red. melting point 2002 ℃ relative density 7.42 solubility insoluble in water, soluble in acid. |
| Use | Used in making metal europium and color TV phosphor |
dieuropiumtrioxide - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | 36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. |
| WGK Germany | 2 |
| RTECS | LE8053000 |
| TSCA | Yes |
| HS Code | 28469014 |
dieuropiumtrioxide - Upstream Downstream Industry
| Raw Materials | Samarium |
dieuropiumtrioxide - Nature
Open Data Verified Data
A reddish white crystalline powder. d7. 42; Melting point 2050 °c. Insoluble in water, soluble in mineral acid, dry, stable in wet air, NaC1 type structure. At T. A 68K is a ferromagnetic and high resistivity material. Semiconductors. When oxygen is excessive, it becomes an insulator. Europium becomes a metal conductor in excess.
Last Update：2025-06-10 22:55:16
dieuropiumtrioxide - Preparation Method
Open Data Verified Data
europium oxide was prepared by reducing europium metal in a molybdenum vessel at a temperature of 800 to 2000 °c. It can also be prepared by reduction of europium oxide with metallic lanthanum.
Last Update：2025-06-10 22:55:16
dieuropiumtrioxide - Application
Open Data Verified Data
raw material of phosphor. It is used in the fields of color cathode ray tube, color TV tube, computer monitor, three primary fluorescent lamp and new long afterglow display, as well as stimulated emission phosphor for new X-ray medical diagnosis system. Europium oxide can also be used in the manufacture of colored lenses, optical filters and magnetic bubble storage devices are also very important materials in the control materials, shielding materials and structural materials of atomic reactors.
Last Update：2025-08-19 16:24:40
dieuropiumtrioxide - Reference Information
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| europium purification | a process for the preparation of fluorescent or reagent grade high purity europium oxide from europium-rich materials. Europium oxide is the raw material of red fluorescent powder for color TV picture tubes and three primary color fluorescent tubes. Its content in nature is very small, and the separation and extraction process is very complicated. The production of fluorescent grade europium oxide from europium-containing rare earth chloride solution usually undergoes three steps: europium oxide enrichment, crude europium oxide purification and removal of trace non-rare earth impurities. |
| europium oxide enrichment | often Eu2O3/RE2O3 ≈ 0.2% rare earth chloride solution as raw material. The first reduction of trivalent europium with zinc powder is divalent europium, and then the enrichment containing Eu2O 320% ~ 40% is obtained by sulfate coprecipitation method, in China has been replaced by solvent extraction enrichment method. When the europium-containing rare earth chloride solution is extracted and separated with acidic phosphorus-containing extractants such as P204 and P507, the grade of europium oxide in the heavy rare earth is enriched from 0.2% to 11% ~ 12%. While the other rare earths are further separated by the extraction method, the grade of europium oxide is increased to 60% ~ 70%, which is used as a raw material for the production of fluorescent grade europium oxide. The enrichment of europium oxide is completed at the same time in the process of separating other rare earths, so it has the characteristics of simple process and high europium recovery rate, which has been adopted by most rare earth factories in China. |
| purification of crude europium oxide | Rare earths are similar in nature, all co-exist in solution as trivalent ions, and are difficult to separate. Therefore, in the production, zinc powder is usually used to reduce the trivalent europium ions in the rare earth chloride solution to divalent europium ions: 2Eu(3 +)+ Zn = = = 2Eu(2 +)+ Zn(2 +),Eu2 + has the characteristics of alkaline earth metals, and can be more stable in aqueous solution, so that it can be separated from the trivalent rare earth. The solvent extraction method is usually used to separate the trivalent rare earth from the rare earth solution containing Eu2 + with acidic phosphorus extractant or carboxylic acid extractant into the organic phase, and Eu2 + is left in the raffinate, to achieve the purpose of separation. In addition, the rare earth chloride solution containing Eu2 + can also be passed through a cation resin exchange column. Both Eu2 + and Eu3 + are adsorbed by ion exchange resin, and then they are separated by leaching with ammonium acetate or EDTA eluent, europium oxide with a purity of 99.9% to 99.95% was obtained. The europium oxide produced by the two purification methods described above is not stable in grade. At present, most rare earth factories in China produce fluorescent grade europium oxide by zinc reduction alkalinity method. In this method, a rare earth chloride solution containing Eu2 + is prepared by reducing the chloride solution of crude europium with zinc powder, zinc amalgam or zinc particles. Ammonia is then added to the solution to precipitate the trivalent rare earth quantitatively as a hydroxide, while Eu2 + remains in the solution. The filtrate obtained by filtration is oxidized with hydrogen peroxide or air to Eu2 + to Eu3 +,Eu3 + and the presence of excess OH-in the solution to form europium hydroxide precipitate, the europium hydroxide obtained had Eu2O3/RE2O3>99.99%. Compared with the other two purification methods, this method has the advantages of simple process, The advantages of stable product quality, is the main method of purification of europium oxide. |
| removal of trace non-rare earth impurities | Non-rare earth impurities such as iron, copper, zinc, calcium will reduce the quality of fluorescent powder, the production of commonly used sulfide precipitation or amine extraction method to remove them, and then use oxalic acid precipitation of europium oxalate. Europium oxalate was calcined to obtain fluorescent grade europium oxide. |
| toxicity | see cerium oxide. |
| Application | used for making metal europium and color TV phosphor used as activator of red phosphor for color TV, phosphor for high pressure mercury lamp. used in the preparation of metal europium and color TV phosphor research reagents, biochemical research used as activator of a variety of phosphors, it can also be used as a control material for an atomic reactor. |
| production method | the extraction method uses a rare earth chloride solution obtained by treating monazite or a mixed rare earth ore as a raw material. Extract with P204-kerosene-HCl-ReCl3 system, first group ND-SM, extract light rare earth with raffinate, extract samarium and heavy rare earth into organic phase, then the heavy rare earth was back-extracted with 2.0 mol/L HCI to obtain the medium rare earth samarium gadolinium enrichment, which was reduced by zinc powder, extracted by alkalinity method, and then precipitated by oxalic acid, separated, dried and burned, europium oxide was obtained. Eu2(C2O4)3 → Eu2O3 3CO2 3CO |
Last Update：2024-04-10 22:29:15
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Raw Materials for dieuropiumtrioxide