Thulium (III) fluoride

Crystal structure
__ Tm 3+      __ F -
Crystal system	orthorhombic
Space group	Pnma (No. 62)
General
Surname	Thulium (III) fluoride
other names	Thulium trifluoride
Ratio formula	TmF 3
Brief description	white to slightly greenish solid
External identifiers / databases
CAS number 13760-79-7 EC number 237-353-7 ECHA InfoCard 100.033.943 PubChem 83710 Wikidata Q15632890
properties
Molar mass	225.93 g mol −1
Physical state	firmly
density	7.971 g cm −3
Melting point	1158 ° C
boiling point	2230 ° C
solubility	almost insoluble in water
safety instructions
GHS labeling of hazardous substances danger H and P phrases H: 301-311-331 P: 261-280-301 + 310-311
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Thulium (III) fluoride is an inorganic chemical compound of thulium from the group of fluorides .

Extraction and presentation

Thulium (III) fluoride can be obtained by reacting thulium (III) oxide with hydrogen fluoride .

${\displaystyle \mathrm {Tm_{2}O_{3}+6\ HF\longrightarrow 2\ TmF_{3}+3\ H_{2}O} }$

Alternatively, it can also be produced by reacting hydrofluoric acid with thulium (III) chloride .

properties

Thulium (III) fluoride is an odorless, slightly greenish solid that is insoluble in water. It has an orthorhombic crystal structure with the space group Pnma (space group no. 62) .

use

It is used for doping optical glasses and for improving IR emissions in the medium IR range from 3.0 µm to 8 µm in oxyfluoride glass ceramics.

Individual evidence

1. ↑ ^{a b c} Jean de Ans, Ellen Lax: Taschenbuch Fur Chemiker und Physiker: Volume 3: Elements, Inorganic ... Springer DE, 1998, ISBN 3-540-60035-3 , p. 780 ( limited preview in Google Book search).
2. ↑ ^{a b c d e f} american elements: American Elements: Thulium Fluoride Supplier & Tech Info
3. ↑ ^{a b c} data sheet Thulium (III) fluoride, anhydrous, powder, 99.99% trace metals basis from Sigma-Aldrich , accessed on March 25, 2013 ( PDF ).
4. ↑ ^{a b} Georg Brauer (Ed.), With the collaboration of Marianne Baudler u a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 254.
5. ↑ Entry on thulium (III) fluoride at ChemicalBook , accessed on January 20, 2014.