Lanthanum nitrate

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Structural formula
La3 + ion    3 Structure of nitrate ion
General
Surname Lanthanum nitrate
other names
  • Lanthanum (III) nitrate
  • Lanthanum trinitrate
Molecular formula La (NO 3 ) 3
Brief description

colorless crystalline powder with a slight odor

External identifiers / databases
CAS number
  • 10099-59-9
  • 10277-43-7 (hexahydrate)
PubChem 25122
Wikidata Q1534650
properties
Molar mass 433.02 g mol −1 (hexahydrate)
Physical state

firmly

density
  • 1.3 g cm −3 (bulk density)
  • 2.358 g cm −3 (hexahydrate)
Melting point

40 ° C

boiling point

126 ° C (1013 hPa) (decomposition)

solubility
  • easily soluble in water (1580 g l −1 at 25 ° C)
  • soluble in ethanol and acids
safety instructions
GHS labeling of hazardous substances

Hexahydrate

03 - Oxidising 05 - Corrosive

danger

H and P phrases H: 272-318
P: 280-305 + 351 + 338-313
Toxicological data

4500 mg kg −1 ( LD 50ratoral )

As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Lanthanum nitrate is a chemical compound of lanthanum from the group of nitrates . The hexahydrate with the formula La (NO 3 ) 3 · 6H 2 O is always formed from an aqueous solution .

Extraction and presentation

Lanthanum nitrate can be obtained by reacting nitric acid with lanthanum , lanthanum oxide , lanthanum hydroxide or lanthanum carbonate .

properties

Lanthanum nitrate is mainly present as hexahydrate . This is a colorless crystalline powder with a slight odor that is readily soluble in water. The hexahydrate has a triclinic crystal structure with the space group P 1 (space group no. 2) . The tetrahydrate produced by the thermal decomposition of the hexahydrate occurs in two polymorphic forms, a monoclinic with the space group P 2 1 / m (space group no. 11) and an orthorhombic with the space group Pbca (space group no. 61) . Template: room group / 2 Template: room group / 11 Template: room group / 61

use

Lanthanum nitrate hexahydrate is used to detect an acetyl group . Solutions of lanthanum nitrate are used to detect fluoride. It also serves as a starting material for the electrochemical synthesis of LaMnO 3 thin-film coatings on stainless steel substrates.

Individual evidence

  1. a b c d e f g h i Data sheet lanthanum nitrate hexahydrate (PDF) from Merck , accessed on March 9, 2017.
  2. ^ A b R. Blachnik: Pocket book for chemists and physicists Volume 3: Elements, inorganic compounds and materials, minerals . Springer-Verlag, 2013, ISBN 978-3-642-58842-6 , pp. 528 ( limited preview in Google Book search).
  3. ^ Robert A. Lewis: Hawley's Condensed Chemical Dictionary . John Wiley & Sons, 2016, ISBN 978-1-119-26784-3 , pp. 1517 ( limited preview in Google Book search).
  4. ^ A b G. Singh: Chemistry of d-block elements . 2007, ISBN 81-8356-242-6 ( page 86 in the Google book search).
  5. A.-E. Gobichon, M. Louër, JP Auffrédic, D. Louër: Structure Determination of Two Polymorphic Phases of La (NO 3 ) 3 -4H 2 O from X-Ray Powder Diffraction. In: Journal of Solid State Chemistry. 126, 1996, p. 127, doi : 10.1006 / jssc.1996.0320 .
  6. ^ Claus Harzdorf: For the photometric titration of fluoride with lanthanum (cerium, yttrium). In: Fresenius' Journal for Analytical Chemistry. 233, 1967, p. 348, doi : 10.1007 / BF00507477 .
  7. Data sheet Lanthanum (III) nitrate hexahydrate, 99.999% trace metals basis from Sigma-Aldrich , accessed on May 31, 2017 ( PDF ).