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Strontium nitrate | |
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Names: | strontium nitrate |
Formula: | Sr(NO3)2 (anhydrous) Sr(NO3)2 · 4H2O (tetrahydrate) |
Molar mass: | 211.628 g/mol (anhydrous) 283.688 g/mol (tetrahydrate) |
Density: | 2.986 g/cm3 (anhydrous) 2.2 g/cm3 (tetrahydrate) |
Crystal system: | cubic (anhydrous) a=7.8123 Å, b=7.8123 Å, c=7.8123 Åα=90°, β=90°, γ=90° monoclinic (tetrahydrate) α=90°, γ=90° |
Shapes: |
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Color: | colorless white |
Melting point: | 29.3 °C302.45 K <br />84.74 °F <br />544.41 °R <br /> (tetrahydrate) 570 °C843.15 K <br />1,058 °F <br />1,517.67 °R <br /> (anhydrous) |
Decomposition point: | 100 °C373.15 K <br />212 °F <br />671.67 °R <br /> (anhydrous) 645 °C918.15 K <br />1,193 °F <br />1,652.67 °R <br /> (tetrahydrate) |
Magnetic properties: | diamagnetic χ=-5.72 · 10-5cm³/mol |
Stability: | stable (tetrahydrate) slightly hygroscopic (anhydrous) |
Hardness: | relatively strong |
Toxicity: | non-toxic LD50=2750mg/kg |
Description
Inorganic compound, salt of alkaline earth metal strontium and inorganic nitric acid. From water solutions crystallizes as tetrahydrate.
Precursors
Reaction between strontium hydroxide or carbonate and nitric acid
Chemical equation:
100.00
g of strontium nitrate tetrahydrate
а 42.88
g of strontium hydroxide or 52.04
g of carbonate and 68.34
g of 65%
acid is required.Add acid to the flask, then add small parts of strontium compound with stirring until it will totally dissolve or, if you use carbonate, until carbon dioxide emission will stop. After reaction will stop, filter the solution and use it for crystal growing.
Reaction between strontium hydroxide or carbonate and ammonium nitrate
Chemical equation:
100.00
g of strontium nitrate tetrahydrate
а 42.88
g of strontium hydroxide or 52.04
g of carbonate and 56.43
g of ammonium nitrate is required.Add to the flask suspended in water strontium compounds and then add small parts of hot ammonium nitrate solution with heating and stirring. Emission of large amount of ammonia will begin.Attention, exuding ammonia irritates eyes and lungs! The synthesis should be carried out only in a fume hood or outdoors!
Notes
Dissolving is endothermic, solution cools much, so use hot water or using heat.
Storage conditions
Keep in its original form or under several layers of varnish at average humidity and room temperature. Do not keep crystals near heaters.
Solubility
Temperature | g/100,00 g water | g/100,00 g ethanol | g/100,00 g methanol | g/100,00 g acetone | g/100,00 g pyridine | g/100,00 g isopropanol | g/100,00 g ammonia | g/100,00 g hydrazine | g/100,00 g 2-methoxyethanol | g/100,00 g 2-ethoxyethanol | g/100,00 g 2-butoxyethanol | |
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(anhydrous) | (tetrahydrate) | (anhydrous) | (anhydrous) | (anhydrous) | (anhydrous) | (anhydrous) | (anhydrous) | (anhydrous) | (anhydrous) | (anhydrous) | (anhydrous) | |
0°C273.15 K <br />32 °F <br />491.67 °R <br /> | 39.5 | 604.3 | 40.4 | |||||||||
10°C283.15 K <br />50 °F <br />509.67 °R <br /> | 53.6 | |||||||||||
20°C293.15 K <br />68 °F <br />527.67 °R <br /> | 70.5 | 0.009 | 0.7 | 0.002 | 5 | |||||||
25°C298.15 K <br />77 °F <br />536.67 °R <br /> | 79.5 | 1.2 | 0.02 | 87.08 | ||||||||
30°C303.15 K <br />86 °F <br />545.67 °R <br /> | 88.7 | 1.66 | 0.048 | 0.023 | ||||||||
40°C313.15 K <br />104 °F <br />563.67 °R <br /> | 90.1 | |||||||||||
60°C333.15 K <br />140 °F <br />599.67 °R <br /> | 93.8 | 0.662 | 0.043 | 0.021 | ||||||||
80°C353.15 K <br />176 °F <br />635.67 °R <br /> | 97.2 | |||||||||||
90°C363.15 K <br />194 °F <br />653.67 °R <br /> | 0.345 | 0.027 | 0.017 | |||||||||
100°C373.15 K <br />212 °F <br />671.67 °R <br /> | 102 |
Gallery
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Cooling of supersaturated solutionStrontium nitrate, Sergey Sachkov, VKontakteVKontakte
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Cooling of supersaturated solutionStrontium nitrate, Sergey Sachkov, VKontakteVKontakte
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Cooling of supersaturated solutionStrontium nitrate, Sergey Sachkov, VKontakteVKontakte
Video
Sources
Strontium compounds | |
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Strontium acetate (Sr(CH3COO)2) • Strontium chloride (SrCl2) • Strontium formate (Sr(COOH)2) • Strontium nitrate (Sr(NO3)2) |