Strontium aluminate

Crystal structure
__ Sr 2+      __ Al 3+      __ O 2−
General
Surname	Strontium aluminate
other names	Aluminum strontia
Ratio formula	SrAl 2 O 4
Brief description	silver colored odorless solid
External identifiers / databases
CAS number 12004-37-4 EC number 234-455-3 ECHA InfoCard 100.031.310 PubChem 15787689 Wikidata Q3498174
properties
Molar mass	205.58 g mol −1
Physical state	firmly
density	3.559 g cm −3
solubility	almost insoluble in water
safety instructions
GHS labeling of hazardous substances no GHS pictograms H and P phrases H: no H-phrases P: no P-phrases
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Strontium aluminate is an inorganic chemical compound of strontium from the group of aluminates . In addition to SrAl ₂ O _4, there are other strontium aluminates such as Sr ₄ Al ₂ O ₇ .

Extraction and presentation

Strontium aluminate can be obtained by reacting strontium oxide with aluminum oxide at 700 to 900 ° C.

${\displaystyle \mathrm {SrO+Al_{2}O_{3}\longrightarrow SrAl_{2}O_{4}} }$

properties

Strontium aluminate is a silver-colored, odorless solid that is insoluble in water. It has a monoclinic crystal structure with the space group P 2 ₁ (space group no. 4) or P 2 ₁ / m (no. 11) . The structure forms a three-dimensional network of corner-sharing AlO ₄ - tetrahedra in whose cavities are the strontium ions.

use

Strontium aluminate is used as a cement component, as a laser material and as a luminous pigment for long-luminous photoluminescence and thermoluminescence. For applications as a phosphor, SrAl ₂ O ₄ is codoped with the rare earth elements europium and dysprosium . After activation, it glows green for up to 10 hours (at 520 nm ). These properties were discovered in 1996.

Individual evidence

1. ↑ ^{a b c d} data sheet Strontium aluminate, 99.5% (metals basis) from AlfaAesar, accessed on February 26, 2015 ( PDF )(JavaScript required) .
2. ↑ ^{a b c} data sheet Strontium aluminate, -100 mesh, 99.5% trace metals basis from Sigma-Aldrich , accessed on February 26, 2015 ( PDF ).
3. ↑ ^{a b c d} Richard C. Ropp: Encyclopedia of the Alkaline Earth Compounds . Newnes, 2012, ISBN 0-444-59553-8 , pp. 553 ( limited preview in Google Book search).
4. ^ Jacques Lucas, Pierre Lucas, Thierry Le Mercier, Alain Rollat, William G. Davenport: Rare Earths: Science, Technology, Production and Use . Elsevier, 2014, ISBN 978-0-444-62744-5 , pp. 312 ( limited preview in Google Book search).