Difference between pages "Thuja oil" and "Thulium"
(Difference between pages)
Jump to navigation
Jump to search
| Line 1: | Line 1: | ||
== Description == | == Description == | ||
| − | A | + | A rare-earth element of the yttrium group. Thulium was discovered in 1879 by P.T.Cleve, a Swedish chemist. It has an abundance of 0.48 ppm in the earth's crust. Thulium occurs in rare earth minerals such as euxenite, ytterspar, sipylite and gadolinite. It is a silvery-white, metal that is easily worked. Thulium is used as a radioactive source in small, portable x-ray machines. |
== Synonyms and Related Terms == | == Synonyms and Related Terms == | ||
| − | + | Tm | |
| − | |||
== Risks == | == Risks == | ||
| − | * | + | * Dust is flammable. |
| − | * | + | * Sensitive to moisture and air. |
| − | * | + | * Fisher Scientific: [https://fscimage.fishersci.com/msds/99064.htm MSDS] |
== Physical and Chemical Properties == | == Physical and Chemical Properties == | ||
| − | Soluble in | + | Soluble in dilute acids. Reacts slowly with water. |
{| class="wikitable" | {| class="wikitable" | ||
| + | |- | ||
| + | ! scope="row"| Composition | ||
| + | | Tm (atomic no. 69) | ||
|- | |- | ||
! scope="row"| CAS | ! scope="row"| CAS | ||
| − | | | + | | 7440-30-4 |
| + | |- | ||
| + | ! scope="row"| Melting Point | ||
| + | | 1545-1550 C | ||
|- | |- | ||
! scope="row"| Density | ! scope="row"| Density | ||
| − | | | + | | 9.318 g/ml |
|- | |- | ||
| − | ! scope="row"| | + | ! scope="row"| Molecular Weight |
| − | | | + | | atomic wt = 168.934 |
| + | |- | ||
| + | ! scope="row"| Boiling Point | ||
| + | | 1725-1727 C | ||
|} | |} | ||
| + | |||
| + | ==Resources and Citations== | ||
| + | |||
| + | * G.S.Brady, ''Materials Handbook'', McGraw-Hill Book Co., New York, 1971 Comment: p. 179 | ||
| + | |||
| + | * Richard S. Lewis, ''Hawley's Condensed Chemical Dictionary'', Van Nostrand Reinhold, New York, 10th ed., 1993 | ||
| + | |||
| + | * ''Van Nostrand's Scientific Encyclopedia'', Douglas M. Considine (ed.), Van Nostrand Reinhold, New York, 1976 | ||
| + | |||
| + | * Random House, ''Webster's Encyclopedic Unabridged Dictionary of the English Language'', Grammercy Book, New York, 1997 | ||
| + | |||
| + | * ''The Merck Index'', Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 9535 | ||
| + | |||
| + | * ''The American Heritage Dictionary'' or ''Encarta'', via Microsoft Bookshelf 98, Microsoft Corp., 1998 | ||
| + | |||
| + | |||
[[Category:Materials database]] | [[Category:Materials database]] | ||
Latest revision as of 13:24, 8 June 2022
Description
A rare-earth element of the yttrium group. Thulium was discovered in 1879 by P.T.Cleve, a Swedish chemist. It has an abundance of 0.48 ppm in the earth's crust. Thulium occurs in rare earth minerals such as euxenite, ytterspar, sipylite and gadolinite. It is a silvery-white, metal that is easily worked. Thulium is used as a radioactive source in small, portable x-ray machines.
Synonyms and Related Terms
Tm
Risks
- Dust is flammable.
- Sensitive to moisture and air.
- Fisher Scientific: MSDS
Physical and Chemical Properties
Soluble in dilute acids. Reacts slowly with water.
| Composition | Tm (atomic no. 69) |
|---|---|
| CAS | 7440-30-4 |
| Melting Point | 1545-1550 C |
| Density | 9.318 g/ml |
| Molecular Weight | atomic wt = 168.934 |
| Boiling Point | 1725-1727 C |
Resources and Citations
- G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 179
- Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
- Van Nostrand's Scientific Encyclopedia, Douglas M. Considine (ed.), Van Nostrand Reinhold, New York, 1976
- Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
- The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 9535
- The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998