|Molar mass||152.49 g/mol|
|Appearance||black crystalline powder|
|Density||3.39 g/cm3, solid (15.0°C)|
|Melting point||2,235 °C (4,055 °F; 2,508 K)|
|Space group||Pm3m ; Oh|
|EU classification||not listed|
Except where noted otherwise, data is given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
|what is: / ?)(|
Strontium boride (SrB6) is an inorganic compound. At room temperature, it appears as a crystalline black powder. Closer examination reveals slightly translucent dark red crystals capable of scratching quartz. It is very stable and has a high melting point and density. Although not thought to be toxic, it is an irritant to the skin, eyes, and respiratory tract.
Strontium boride, along with other alkali-earth metal borides, has been shown to exhibit weak ferromagnetism at low temperatures. This is thought by some to be caused by slight impurities or aberrations in the crystal lattice, while others suggest different explanations are needed. Strontium boride has also been examined for semiconducting properties at lower temperatures.
In his book The Electric Furnace, Henri Moissan describes an early synthesis of strontium boride by mixing strontium borate, aluminum, and carbon in an electric furnace. Alternatively, a solid-phase synthesis of strontium boride can be carried out by reacting two moles of strontium carbonate with three moles of boron carbide and one mole of carbon inside a vacuum furnace.
Strontium boride is used in insulation and nuclear control rods. A recent patent filed for aircraft windows uses SrB6 nanoparticles in a transparent acrylic sheet. The IR-absorbing properties of these nanoparticles prevents the transmittance of infrared wavelengths while still allowing the transmittance of visible light.
- Moissan, Henri. The Electric Furnace.
- D. P. Young, D. Hall, M. E. Torelli, Z. Fisk, J. L. Sarrao, J. D. Thompson, H. R. Ott, S. B. Oseroff, R. G. Goodrich, and R. Zysler. High-temperature weak ferromagnetism in a low-density free-electron gas. Nature (London), 397, 412 (1999).
- Shang, S., & Liu, Z. "Thermodynamics of the B–Ca, B–Sr, and B–Ba systems: Applications for the fabrications of CaB6, SrB6, and BaB6 thin films". Applied Physics Letters, 2007, 90, 091914-1. Retrieved April 30, 2009, doi:10.1063/1.2710081
- J. L. Gavilano, B. Ambrosini, H. R. Ott, D. P. Young, Z. Fisk, "Low-temperature NMR studies of SrB6", Physica B: Condensed Matter, Volumes 281–282, 1 June 2000, Pages 428–429, ISSN 0921-4526, doi:10.1016/S0921-4526(99)01197-7 (http://www.sciencedirect.com/science/article/B6TVH-400WKV6-68/2/9b3bc29604aac16dd96856e9c7aab187)
- Dorneles, L., Venkatesan, M., Moliner, M., Lunney, J., & Coey, J. "Magnetism in thin films of CaB6 and SrB6". Applied Physics Letters, 2004, 85, 6377–6379. Retrieved April 30, 2009, doi:10.1063/1.1840113
- H. R. Ott, M. Chernikov, E. Felder, L. Degiorgi, E. G. Moshopoulou, J. L. Sarrao, Z. Fisk. Structure and low temperature properties of SrB6. Z. Phys. B, 1997, 102, 337–345.
- Shu-Qi Zheng, Zeng-Da Zou, Guang-Hui Min, Hua-Shun Yu, Jian-De Han, Wei-Ti Wang. "Synthesis of strontium hexaboride powder by the reaction of strontium carbonate with boron carbide and carbon". Journal of Materials Science Letters, 2002, 21, 313–315.
- "United States Patent Application 20090093578". Retrieved 2009-05-05.