SAMARIUM ???
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SAMARIUM ??? ??
- ???
- 2325 °C
- ??
- 8.35 g/mL at 25 °C(lit.)
- ???
- 1.97
- ?? ??
- no restrictions.
- ??? ??
- ????
- ??
- ???
- Specific Gravity
- 8.347
- ??????(pH)
- 8.0 (10g/l, H2O, 25℃)(slurry)
- ???
- ?? ???.
- Crystal Structure
- Cubic
- crystal system
- Monoclinic
- Merck
- 14,8347
- Space group
- C2/m
- Lattice constant
a/nm b/nm c/nm α/o β/o γ/o V/nm3 1.4177 0.3633 0.8847 90 99.96 90 0.4488
- InChI
- InChI=1S/3O.2Sm
- InChIKey
- PRCWVHVINXAFRG-UHFFFAOYSA-N
- SMILES
- O([Sm]=O)[Sm]=O
- CAS ??????
- 12060-58-1(CAS DataBase Reference)
??
- ?? ? ?? ??
- ?? ? ???? ?? (GHS)
| ????? | 22-24/25 | ||
|---|---|---|---|
| WGK ?? | 2 | ||
| RTECS ?? | VP3153000 | ||
| F ?????? | 3-10-34 | ||
| TSCA | Yes | ||
| HS ?? | 28469019 | ||
| ?? | LD50 orally in Rabbit: > 5000 mg/kg | ||
| ???? ?? | KE-30864 |
SAMARIUM ??? C??? ??, ??, ??
??? ??
light beige crystalline powder??? ??
Yellowish-white powder; density 8.347g/cm3; insoluble in water; dissolves readily in mineral acids.??
Samarium sesquioxide is used in optical and infrared absorbing glass to absorb infrared radiation. Also, it is used as a neutron absorber in control rods for nuclear power reactors. The oxide catalyzes dehydration of acyclic primary alcohols to aldehydes and ketones. Another use involves preparation of other samarium salts.?? ??
Samarium sesquioxide may be prepared by two methods; (1) thermal decomposition of samarium carbonate, hydroxide, nitrate, oxalate or sulfate:Sm2(CO3)3 → Sm2O3 + 3CO2
2Sm(OH)3 → Sm2O3 + 3H2O
or (2) by burning the metal in air or oxygen at a temperature above 150°C:
4Sm + 3O2 → 2Sm2O3.
SAMARIUM ??? ?? ?? ? ???
???
monazite
????
rare earth element ore： rare earth metal ore
MISCH METAL
OD
????
???
??????
?? ???(III)
?? ??
SAMARIUM ??? ?? ??
???( 325)?? ??
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