Neodymium(III) hydroxide
Neodymium(III) hydroxide is an inorganic compound with the chemical formula Nd(OH)3.
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3D model (JSmol) |
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| ChemSpider | |
| ECHA InfoCard | 100.036.816 |
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| Properties | |
| Nd(OH)3 | |
| Molar mass | 195.266 |
| Appearance | rose solid[1] |
| Related compounds | |
Other anions |
neodymium(III) oxide |
Other cations |
praseodymium(III) hydroxide samarium(III) hydroxide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
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Production
React neodymium(III) nitrate and ammonia water, to produce neodymium(III) hydroxide[2]
- Nd(NO3)3 + 3 NH3·H2O → Nd(OH)3↓ + 3 NH4NO3
If the amount of Nd(NO3)3 is 40g/L，the amount of ammonia water is 0.50 mol/L; put ammonia water into Nd(NO3)3 solution at the speed of 1.5mL/min, and control pH at 7.35，use polyethylene glycol as scatterer, it will produce neodymium(III) hydroxide powder with grain size ≤1μm。[3]
Chemical properties
Neodymium(III) hydroxide can react with acid and produce neodymium salts：
- Nd(OH)3 + 3 H+ → Nd3+ + 3 H2O
gollark: What? Of course they are in our universe.
gollark: Those aren't heaven and hell, silly.
gollark: > The temperature of Heaven can be rather accurately computed from available data. Our authority is Isaiah 30:26, “Moreover, the light of the Moon shall be as the light of the Sun and the light of the Sun shall be sevenfold, as the light of seven days.” Thus Heaven receives from the Moon as much radiation as we do from the Sun, and in addition seven times seven (49) times as much as the Earth does from the Sun, or fifty times in all. The light we receive from the Moon is one ten-thousandth of the light we receive from the Sun, so we can ignore that. With these data we can compute the temperature of Heaven. The radiation falling on Heaven will heat it to the point where the heat lost by radiation is just equal to the heat received by radiation, i.e., Heaven loses fifty times as much heat as the Earth by radiation. Using the Stefan-Boltzmann law for radiation, (H/E)^4 = 50, where E is the absolute temperature of the earth (-300K), gives H as 798K (525C). The exact temperature of Hell cannot be computed, but it must be less than 444.6C, the temperature at which brimstone or sulphur changes from a liquid to a gas. Revelations 21:8 says “But the fearful, and unbelieving … shall have their part in the lake which burneth with fire and brimstone.” A lake of molten brimstone means that its temperature must be at or below the boiling point, or 444.6C (Above this point it would be a vapor, not a lake.) We have, then, that Heaven, at 525C is hotter than Hell at 445C. – “Applied Optics”, vol. 11, A14, 1972
gollark: This is because it canonically receives 50 times the light Earth does.
gollark: Heaven is in fact hotter.
References
- 《无机化学丛书》. 第七卷 钪 稀土元素. 易宪武 等主编. 科学出版社. P168~171. (2)氢氧化物
- 《无机化合物制备手册》. 朱文祥 主编. 化学工业出版社. 【III-119】氢氧化钕（neodymium hydroxide）
- 刘治平, 王晓铁. 氢氧化镧和氢氧化钕微粉的制备[J]. 《稀土》. Vol.25 No.3 Jun.2004
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