Tin: Difference between revisions
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(Created page with "{{Compound|name=Tin|chemf=Sn|density=7.365|mp=231.93|bp=2602|num=50|group=Metalloids|stp_p=solid|stp_q=grey|mm=118.7|nfpa_h=1|nfpa_f=0|cote=23.8|nfpa_r=0}} ==Uses== ===Primary...") |
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==Uses== | ==Uses== | ||
===Primary=== | ===Primary=== | ||
* as a component of | * as a component of bronze, brass and pewter. | ||
* as a component of '''solder''' | * as a component of '''solder''' | ||
===Secondary=== | ===Secondary=== | ||
* tin is a useful structural material where its malleable nature is used, such as hinges or crimpable fasteners | * tin is a useful structural material where its malleable nature is used, such as hinges or crimpable fasteners | ||
Revision as of 09:56, 26 June 2019
| Chemical formula | Sn |
|---|---|
| Atomic Number | 50 |
| OTP appearance | grey solid |
| Molar Mass(g/mol) | 118.7 |
| Density(g/cc) | 7.365 |
| Melting Point(°C) | 231.93 |
| Boiling Point(°C) | 2602 |
| Coefficient of Thermal Expansion(×10-6 °C-1) | 23.8 |
| NFPA 704 |  0
1
0
|
Uses
Primary
- as a component of bronze, brass and pewter.
- as a component of solder
Secondary
- tin is a useful structural material where its malleable nature is used, such as hinges or crimpable fasteners
Natural Sources
- Elemental tin does not occur naturally
- -oxide occurrs naturally as cassiterite
Hazards
- Virtually all organotin compounds are highly toxic
- At temperatures below 14°C, tin undergoes an allotropic change which changes the tin from a metallic form to a nonmetallic form. This is called "tin blight" or "tin pest". This process slowly reverses above 14°C and is rapidly reversed above 100°C.
Character
- Tin has two important allotropes:
- α- or "grey" tin which is grey, brittle, and nonmetallic.
- β- or "white" tin which is silvery, ductile and metallic.
- At 13.2 °C and below, pure Β tin transforms to α-tin
Production
- Carbothermic reduction of cassiterite
Purification
Testing
Storage
- stacked as ingots, keeping the temperature above 14°C
Disposal
See Also
Documents
- Smelting Tin at Geevor Museum
- An Analysis of the Process of Smelting Tin, The Bulletin of Peak District Mines Historical Society Vol 13 No 2 Winter 1996