12008-21-8

• 常用中文名：六硼化镧
• 常用英文名：Lanthanum boride
• CAS号：12008-21-8
• 分子式：B₆La
• 分子量：203.77200
• 相关类别： 无机化工 无机盐 硼化物、硼酸盐和过硼酸盐
• 发布时间：2018-07-30 21:42:16
• 更新时间：2024-01-02 08:31:13

• 用途十分广泛，已成功应用于雷达航空航天、电子工业、仪表仪器、医疗器械、家电冶金、环保等二十余个军事和高科技领域。其系列产品主要包括三种粉末、多晶体、单晶体。特别是六硼化镧单晶，是制作大功率电子管、磁控器、电子束、离子束、加速器阴极的最佳材料。
  

名称

• 中文名: 硼化镧
• 英文名: Lanthanum boride
• 中文别名: 六硼化镧
• 英文别名: Lanthanum hexaboride; MFCD00151350; EINECS 234-531-6

物化性质

• 密度: 2.61 g/mL at 25 °C(lit.)
• 熔点: 2530°C
• 分子式: B₆La
• 分子量: 203.77200
• 精确质量: 204.96200
• 外观性状: powder
• 储存条件:

  密封于阴凉干燥处。

• 稳定性:

  遵照规格使用和储存则不会分解。立方晶系，CaB6型结构，空间群Pm3m，a＝4.1561A^·(4.1571)(1A^·=0.1nm,下同)

• 分子结构:

  1、摩尔折射率：无可用

  2、 摩尔体积（cm³/mol）： 无可用

  3、 等张比容（90.2K）：无可用

  4、 表面张力（dyne/cm）：无可用

• 计算化学:

  1.疏水参数计算参考值（XlogP）:无

  2.氢键供体数量:0

  3.氢键受体数量:2

  4.可旋转化学键数量:0

  5.互变异构体数量:无

  6.拓扑分子极性表面积0

  7.重原子数量:7

  8.表面电荷:-2

  9.复杂度:132

  10.同位素原子数量:0

  11.确定原子立构中心数量:0

  12.不确定原子立构中心数量:0

  13.确定化学键立构中心数量:0

  14.不确定化学键立构中心数量:0

  15.共价键单元数量:2

• 更多:

  1. 性状：蓝至紫色，紫色粉末。

  2. 密度（g/mL,20℃）：4.76

  3. 相对蒸汽密度（g/mL,空气=1）：无可用

  4. 熔点（ºC）：2715

  5. 沸点（ºC,常压）：无可用

  6. 沸点（ºC,5.2kPa）： 无可用

  7. 折射率： 无可用

  8. 闪点（ºC）： 无可用

  9. 比旋光度（º）：无可用

  10. 自燃点或引燃温度（ºC）：无可用

  11. 蒸气压（kPa,25ºC）：无可用

  12. 饱和蒸气压（kPa,60ºC）：无可用

  13. 燃烧热（KJ/mol）：无可用

  14. 临界温度（ºC）：无可用

  15. 临界压力（KPa）：无可用

  16. 油水（辛醇/水）分配系数的对数值：无可用

  17. 爆炸上限（%,V/V）：无可用

  18. 爆炸下限（%,V/V）： 无可用

  19. 溶解性：难溶于水、盐酸

MSDS

Name: Lanthanum hexaboride 99% Material Safety Data Sheet Synonym: Lanthanum borid CAS: 12008-21-8 Section 1 - Chemical Product MSDS Name:Lanthanum hexaboride 99% Material Safety Data Sheet Synonym:Lanthanum borid Section 2 - COMPOSITION, INFORMATION ON INGREDIENTS CAS# Chemical Name content EINECS# 12008-21-8 Lanthanum hexaboride, 99% 99% 234-531-6 Hazard Symbols: None Listed. Risk Phrases: None Listed. Section 3 - HAZARDS IDENTIFICATION EMERGENCY OVERVIEW The toxicological properties of this material have not been fully investigated. Potential Health Effects Eye: May cause eye irritation. Skin: May cause skin irritation. Ingestion: May cause irritation of the digestive tract. The toxicological properties of this substance have not been fully investigated. Inhalation: May cause respiratory tract irritation. The toxicological properties of this substance have not been fully investigated. Chronic: No information found. Section 4 - FIRST AID MEASURES Eyes: Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately. Skin: Get medical aid. Flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes. Ingestion: If victim is conscious and alert, give 2-4 cupfuls of milk or water. Get medical aid immediately. Inhalation: Get medical aid immediately. Remove from exposure and move to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Notes to Physician: Section 5 - FIRE FIGHTING MEASURES General Information: As in any fire, wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Extinguishing Media: Use water spray, dry chemical, carbon dioxide, or chemical foam. Section 6 - ACCIDENTAL RELEASE MEASURES General Information: Use proper personal protective equipment as indicated in Section 8. Spills/Leaks: Vacuum or sweep up material and place into a suitable disposal container. Section 7 - HANDLING and STORAGE Handling: Wash thoroughly after handling. Use with adequate ventilation. Avoid contact with skin and eyes. Avoid ingestion and inhalation. Storage: Store in a cool, dry place. Store in a tightly closed container. Section 8 - EXPOSURE CONTROLS, PERSONAL PROTECTION Engineering Controls: Facilities storing or utilizing this material should be equipped with an eyewash facility and a safety shower. Use process enclosure, local exhaust ventilation, or other engineering controls to control airborne levels. Exposure Limits CAS# 12008-21-8: Personal Protective Equipment Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure. Respirators: Follow the OSHA respirator regulations found in 29 CFR 1910.134 or European Standard EN 149. Use a NIOSH/MSHA or European Standard EN 149 approved respirator if exposure limits are exceeded or if irritation or other symptoms are experienced. Section 9 - PHYSICAL AND CHEMICAL PROPERTIES Physical State: Solid Color: not available Odor: Not available. pH: Not available. Vapor Pressure: Not available. Viscosity: Not available. Boiling Point: Not available. Freezing/Melting Point: 2210 deg C Autoignition Temperature: Not available. Flash Point: Not available. Explosion Limits, lower: Not available. Explosion Limits, upper: Not available. Decomposition Temperature: Solubility in water: insoluble Specific Gravity/Density: 2.6100g/cm3 Molecular Formula: B6La Molecular Weight: 203.78 Section 10 - STABILITY AND REACTIVITY Chemical Stability: Stable under normal temperatures and pressures. Conditions to Avoid: None reported. Incompatibilities with Other Materials: Strong oxidizing agents. Hazardous Decomposition Products: None. Hazardous Polymerization: Has not been reported. Section 11 - TOXICOLOGICAL INFORMATION RTECS#: CAS# 12008-21-8 unlisted. LD50/LC50: Not available. Carcinogenicity: Lanthanum hexaboride, 99% - Not listed by ACGIH, IARC, or NTP. Section 12 - ECOLOGICAL INFORMATION Section 13 - DISPOSAL CONSIDERATIONS Dispose of in a manner consistent with federal, state, and local regulations. Section 14 - TRANSPORT INFORMATION IATA Not regulated as a hazardous material. IMO Not regulated as a hazardous material. RID/ADR Not regulated as a hazardous material. Section 15 - REGULATORY INFORMATION European/International Regulations European Labeling in Accordance with EC Directives Hazard Symbols: Not available. Risk Phrases: Safety Phrases: S 24/25 Avoid contact with skin and eyes. WGK (Water Danger/Protection) CAS# 12008-21-8: No information available. Canada CAS# 12008-21-8 is listed on Canada's DSL List. CAS# 12008-21-8 is not listed on Canada's Ingredient Disclosure List. US FEDERAL TSCA CAS# 12008-21-8 is listed on the TSCA inventory. SECTION 16 - ADDITIONAL INFORMATION N/A

毒性和生态

生态学数据: 通常对水是不危害的，若无政府许可，勿将材料排入周围环境。

安全

• 个人防护装备: Eyeshields;Gloves;type N95 (US);type P1 (EN143) respirator filter
• 危害码 (欧洲): Xi
• 危险品运输编码: NONH for all modes of transport
• WGK德国: 3

制备

按化学计量混合搅拌少量的氧化镧、硼和炭黑粉末(总共约1g)直至均匀，把反应物压成薄片［1in（1in=00254m）×1/2in×1/16in］。薄片装入1.5in高、直径1.7in的石墨坩埚中。后者又放入更大的石墨坩埚中（4in高、直径），通入氢气，在1500℃加热2h或在1800℃加热1h。