Scandium fluoride

Crystal structure
	__ Sc 3+ __ F -
General
Surname	Scandium fluoride
other names	Scandium trifluoride; Scandium (III) fluoride;
Ratio formula	ScF 3
Brief description	white solid
External identifiers / databases
EC number	237-255-4
ECHA InfoCard	100,033,854
PubChem	83678
Wikidata	Q418796
properties
Molar mass	101.95 g mol −1
Physical state	firmly
density	2.62 g cm −3
Melting point	1553 ° C
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 .

Scandium fluoride is a chemical compound of scandium from the group of fluorides .

Extraction and presentation

Scandium fluoride can be obtained by reacting scandium (III) hydroxide or scandium (III) oxide with hydrofluoric acid .

{\ displaystyle \ mathrm {Sc (OH) _ {3} +3 \ HF \ longrightarrow ScF_ {3} +3 \ H_ {2} O}}

It can also be obtained by reacting the scandium (III) oxide from the mineral thortveitite with ammonium hydrogen difluoride at high temperatures.

{\ displaystyle \ mathrm {Sc_ {2} O_ {3} +6 \ NH_ {4} HF_ {2} \ longrightarrow 2 \ ScF_ {3} +6 \ NH_ {4} F + 3 \ H_ {2} O} }

properties

Scandium fluoride is a white powder that is very sparingly soluble in water. However, it is soluble in alkali carbonate and ammonium carbonate solutions. Scandium fluoride is completely decomposed by an alkali melt. It forms hexagonal crystals with a trigonal crystal structure and the space group R 32 and the lattice constants a = 4.916 Å and c = 12.455 Å.

use

Scandium fluoride is used as an important intermediate in the manufacture of scandium and scandium-aluminum alloys. The scandium is obtained by reducing scandium fluoride with calcium.

{\ displaystyle \ mathrm {2 \ ScF_ {3} +3 \ Ca \ longrightarrow 2 \ Sc + 3 \ CaF_ {2}}}

Individual evidence

↑ ^a ^b ^c Georg Brauer (ed.), With the collaboration of Marianne Baudler a . a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 268.
↑ ^a ^b ^c data sheet Scandium (III) fluoride, anhydrous, powder, 99.99% trace metals basis from Sigma-Aldrich , accessed on July 13, 2012 ( PDF ).
^ ^A ^b Jean D'Ans, Ellen Lax: Paperback for chemists and physicists . Springer DE, 1997, ISBN 3-540-60035-3 , pp. 718 ( limited preview in Google Book search).
↑ Pradyot Patnaik, 2003, Handbook of Inorganic Chemicals, McGraw-Hill Professional, ISBN 0-07-049439-8 .
↑ R. Loesch, V. Hebecker, Z. Ranft: Radiographic investigations on new ternary fluorides of the type Tl (III) MF ₆ (M = Ga, In, Sc) as well as on single crystals of ScF ₃ . In: Zeitschrift für Anorganische und Allgemeine Chemie , 1982 , 491 , pp. 199-202 doi : 10.1002 / zaac.19824910125 .
↑ Cheryl K. Rofer, Tõnis Kaasik: Turning a Problem Into a Resource: Remediation and Waste Management at the ... Springer, 2000, ISBN 0-7923-6186-5 , p. 60 ( limited preview in Google Book search).

[brauer-1] Georg Brauer (ed.), With the collaboration of Marianne Baudler a . a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 268.

[Sigma-2] ta sheet Scandium (III) fluoride, anhydrous, powder, 99.99% trace metals basis from Sigma-Aldrich , accessed on July 13, 2012 ( PDF ).

[Lax-3] A ^b Jean D'Ans, Ellen Lax: Paperback for chemists and physicists . Springer DE, 1997, ISBN 3-540-60035-3 , pp. 718 ( limited preview in Google Book search).

[Patnaik-4] Pradyot Patnaik, 2003, Handbook of Inorganic Chemicals, McGraw-Hill Professional, ISBN 0-07-049439-8 .

[5] R. Loesch, V. Hebecker, Z. Ranft: Radiographic investigations on new ternary fluorides of the type Tl (III) MF ₆ (M = Ga, In, Sc) as well as on single crystals of ScF ₃ . In: Zeitschrift für Anorganische und Allgemeine Chemie , 1982 , 491 , pp. 199-202 doi : 10.1002 / zaac.19824910125 .

[Kaasik-6] Cheryl K. Rofer, Tõnis Kaasik: Turning a Problem Into a Resource: Remediation and Waste Management at the ... Springer, 2000, ISBN 0-7923-6186-5 , p. 60 ( limited preview in Google Book search).