100g Glow Pigment Eli-Glow Luminescent Pigment Powder Cobalt Blue, Super-Grade Strontium Aluminate, neon Powder Phosphorescent Afterglow

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a b "Mineral Resource of the Month: Strontium". U.S. Geological Survey. 8 December 2014 . Retrieved 16 August 2015. Strontium chloride is sometimes used in toothpastes for sensitive teeth. One popular brand includes 10% total strontium chloride hexahydrate by weight. [71] Small amounts are used in the refining of zinc to remove small amounts of lead impurities. [9] The metal itself has a limited use as a getter, to remove unwanted gases in vacuums by reacting with them, although barium may also be used for this purpose. [10] Had Demarçayand the other investigators known a little more about the chemistry of europium, they might have isolated it much earlier. Unlike the other lanthanoids, which tend to form Ln(iii) compounds, europium has a stable reduced form, europium(II), and this could have been the key to separating it easily from the other lanthanoid elements. The insoluble salt, europium(II) sulfate (EuSO 4) precipitates from solution leaving the other lanthanoids behind. Naturally occurring Cubic strontium aluminate can be used used as a water-soluble sacrificial layer for the production of free-standing films of complex oxide materials. [13] [14] Safety [ edit ]

Aitasalo, T.; Hölsä, J.; Jungner, H.; Lastusaari, M.; Niittykoski, J. Mechanisms of persistent luminescence in Eu 2+, Re 3+ doped alkaline Earth aluminates. J. Lumin. 2001, 9 Care should be used when handling loose powder, which can cause irritation if inhaled or exposed to mucous membranes. Organostrontium compounds contain one or more strontium–carbon bonds. They have been reported as intermediates in Barbier-type reactions. [16] [17] [18] Although strontium is in the same group as magnesium, and organomagnesium compounds are very commonly used throughout chemistry, organostrontium compounds are not similarly widespread because they are more difficult to make and more reactive. Organostrontium compounds tend to be more similar to organo europium or organo samarium compounds due to the similar ionic radii of these elements (Sr 2+ 118pm; Eu 2+ 117pm; Sm 2+ 122pm). Most of these compounds can only be prepared at low temperatures; bulky ligands tend to favor stability. For example, strontium di cyclopentadienyl, Sr(C 5H 5) 2, must be made by directly reacting strontium metal with mercurocene or cyclopentadiene itself; replacing the C 5H 5 ligand with the bulkier C 5(CH 3) 5 ligand on the other hand increases the compound's solubility, volatility, and kinetic stability. [19] Peng D, Wang C, Ma R, Mao S, Qu S, Ren Z, Golovynskyi S, Pan C (2021) Mechanoluminescent materials for athletic analytics in sports science. Sci Bull 66(3):206–209. https://doi.org/10.1016/j.scib.2020.09.029

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Jia Z, Yuan C, Liu Y, Wang X-J, Sun P, Wang L, Jiang H, Jiang J (2020) Strategies to approach high performance in Cr3+-doped phosphors for high-power NIR-LED light sources. Light Sci Appl 9(1):86. https://doi.org/10.1038/s41377-020-0326-8 Tian, S.; Wen, J.; Fan, H.; Chen, Y.; Yan, J.; Zhang, P. Sunlight-activated long persistent luminescent polyurethane incorporated with amino-functionalized SrAl 2O 4:Eu 2+, Dy 3+ phosphor. Polym. Int. 2016, 65, 1238–1244. [ Google Scholar] [ CrossRef] Yao Q, Hu P, Sun P, Liu M, Dong R, Chao K, Liu Y, Jiang J, Jiang H (2020) YAG:Ce3+ transparent ceramic phosphors brighten the next-generation laser-driven lighting. Adv Mater 32(19):1907888. https://doi.org/10.1002/adma.201907888 The mean strontium content of ocean water is 8mg/L. [48] [49] At a concentration between 82 and 90 μmol/L of strontium, the concentration is considerably lower than the calcium concentration, which is normally between 9.6 and 11.6mmol/L. [50] [51] It is nevertheless much higher than that of barium, 13μg/L. [9] Production [ edit ] Strontium producers in 2014 [52] For europium-dysprosium doped aluminates, the peak emission wavelengths are 520nm for SrAl 2O 4, 480nm for SrAl 4O 7, and 400nm for SrAl 12O 19. [3]

Du Y, Jiang Y, Sun T, Zhao J, Huang B, Peng D, Wang F (2019) Mechanically excited multicolor luminescence in lanthanide ions. Adv Mater 31(7):1807062. https://doi.org/10.1002/adma.201807062 In groundwater strontium behaves chemically much like calcium. At intermediate to acidic pH Sr 2+ is the dominant strontium species. In the presence of calcium ions, strontium commonly forms coprecipitates with calcium minerals such as calcite and anhydrite at an increased pH. At intermediate to acidic pH, dissolved strontium is bound to soil particles by cation exchange. [47] The most described type is the stoichiometric green-emitting (approx. 530nm) Eu 2+:SrAl 2O 4. Eu 2+,Dy 3+,B:SrAl 2O 4 shows significantly longer afterglow than the europium-only doped material. The Eu 2+ dopant shows high afterglow, while Eu 3+ has almost none. Polycrystalline Mn:SrAl 12O 19 is used as a green phosphor for plasma displays, and when doped with praseodymium or neodymium it can act as a good active laser medium. Sr 0.95Ce 0.05Mg 0.05Al 11.95O 19 is a phosphor emitting at 305nm, with quantum efficiency of 70%. Several strontium aluminates can be prepared by the sol-gel process. [5] Advancements in understanding of phosphorescent mechanisms, as well as advancements in molecular imaging, have enabled the development of novel, state-of-the-art strontium aluminates. [1] Properties [ edit ]Turekian, K. K.; Wedepohl, K. H. (1961). "Distribution of the elements in some major units of the Earth's crust". Geological Society of America Bulletin. 72 (2): 175–92. Bibcode: 1961GSAB...72..175T. doi: 10.1130/0016-7606(1961)72[175:DOTEIS]2.0.CO;2. The three major producers of strontium as celestine as of 2015 are China (150,000t), Spain (90,000 t), and Mexico (70,000t); Argentina (10,000t) and Morocco (2,500t) are smaller producers. Although strontium deposits occur widely in the United States, they have not been mined since 1959. [52] Misevičius, Martynas; Jørgensen, Jens Erik; Kareiva, Aivaras (2013). "Sol-Gel Synthesis, Structural and Optical Properties of Cerium-Doped Strontium Aluminates, Sr3Al2O6 and SrAl12O19". Materials Science. 19 (4). doi: 10.5755/j01.ms.19.4.2670. When the emission of luminescent light ceases with the removal of the charging light source, the luminescent material is called FLUORESCENT. If the emission of light continues for an appreciable period of time after the exciting energy has been removed, the luminescent material is known as PHOSPHORESCENT or PHOTO-LUMINESCENT, and has the property of glowing-in-the-dark.

Meunier P. J.; Roux C.; Seeman E.; Ortolani, S.; Badurski, J. E.; Spector, T. D.; Cannata, J.; Balogh, A.; Lemmel, E. M.; Pors-Nielsen, S.; Rizzoli, R.; Genant, H. K.; Reginster, J. Y. (January 2004). "The effects of strontium ranelate on the risk of vertebral fracture in women with postmenopausal osteoporosis" (PDF). New England Journal of Medicine. 350 (5): 459–68. doi: 10.1056/NEJMoa022436. hdl: 2268/7937. PMID 14749454. Nakazawa, T.M.E. Traps in SrA1 2O 4: Eu 2+ phosphor with rare-Earth ion doping. J. Lumin. 1997, 72–74, 236–237. [ Google Scholar] [ CrossRef] Lü, X.; Zhong, M.; Shu, W.; Yu, Q.; Xiong, X.; Wang, R. Alumina encapsulated SrAl 2O 4:Eu 2+, Dy 3+ phosphors. Powder Technol. 2007, 177, 83–86. [ Google Scholar] [ CrossRef] Heriot, T. H. P (2008). "strontium saccharate process". Manufacture of Sugar from the Cane and Beet. Read Books. ISBN 978-1-4437-2504-0. Arellano-Tánori, O.; Meléndrez, R.; Pedroza-Montero, M.; Castañeda, B.; Chernov, V.; Yen, W.M.; Barboza-Flores, M. Persistent luminescence dosimetric properties of UV-irradiated SrAl 2O 4:Eu 2+, Dy 3+ phosphor. J. Lumin. 2008, 128, 173–184. [ Google Scholar] [ CrossRef]

The Unrivaled Process

A colourful use of strontium, and one for which the element cannot be substituted, is the use of Sr(NO 3) 2 to provide the intense red of warning flares and it is also used in fireworks. Modern glow in the dark paints rely on strontium aluminate, which absorbs light during the day and releases it slowly for hours afterwards. In addition, strontium titanate (SrTiO 3) has been used in optical devices and crystals of the compound out-sparkle diamond because they have a higher refractive index. However, the crystals have not been widely used as gemstones because their surfaces are easily scratched. Isotopes, natural or not Kim, S.J.; Won, H.I.; Hayk, N.; Won, C.W.; Jeon, D.Y.; Kirakosyan, A.G. Preparation and characterization of Sr 4Al 2O 7:Eu 3+, Eu 2+ phosphors. Mater. Sci. Eng. B 2011, 176, 1521–1525. [ Google Scholar] [ CrossRef] A vertical column in the periodic table. Members of a group typically have similar properties and electron configurations in their outer shell.