Barium tetraiodomercurate (II)

Structural formula
General
Surname	Barium tetraiodomercurate (II)
other names	Barium mercury iodide
Molecular formula	Ba [HgI 4 ]
Brief description	yellow to reddish solid
External identifiers / databases
CAS number 10048-99-4 EC number 233-160-7 ECHA InfoCard 100.030.133 PubChem 44150723 Wikidata Q27293674
properties
Molar mass	845.53 g mol −1
Physical state	firmly
solubility	very soluble in water and ethanol
safety instructions
GHS hazard labeling no classification available
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Barium tetraiodomercurate (II) is an inorganic chemical compound from the group of potassium compounds , iodine complexes and mercury compounds .

properties

Barium tetraiodomercurate (II) is a yellow to reddish deliquescent solid that is very soluble in water. The clear, yellowish, highly refractive concentrated aqueous solution (maximum density 3.485 g / cm ³ at 20 ° C) is used as an alkaloid reagent in microchemistry . In mineralogy it can also be used for the swim-sink preparation of mineral mixtures (Rohrbach's solution, according to Carl EG Rohrbach ) and for determining the density of minerals ( heavy liquid ), but it is highly toxic.

Extraction and presentation

Barium tetraiodomercurate (II) can be obtained analogously to potassium tetraiodomercurate (II) by reacting mercury (II) chloride or mercury (II) iodide with barium iodide .

${\displaystyle \mathrm {HgCl_{2}+2\ BaI_{2}\longrightarrow Ba[HgI_{4}]+BaCl_{2}} }$

${\displaystyle \mathrm {HgI_{2}+BaI_{2}\longrightarrow Ba[HgI_{4}]} }$

Individual evidence

1. ↑ ^{a b c d} Dale L. Perry: Handbook of Inorganic Compounds, Second Edition . CRC Press, 2016, ISBN 978-1-4398-1462-8 , pp. 58 ( books.google.de ).
2. ↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
3. ↑ Alexander Senning: Elsevier's Dictionary of Chemoetymology: The Whys and Whences of Chemical Nomenclature and Terminology . Elsevier, 2006, ISBN 978-0-08-048881-3 ( books.google.de ).
4. ^ François Cardarelli: Materials Handbook A Concise Desktop Reference . Springer Science & Business Media, 2008, ISBN 978-1-84628-669-8 , pp. 1173 ( limited preview in Google Book search).
5. ^ Heavy fluids - Lexicon of Geosciences . ( Spektrum.de ).
6. ↑ Entry on barium tetraiodomercurate (II). In: Römpp Online . Georg Thieme Verlag, accessed on September 7, 2017.
7. ^ Will Kleber, Hans-Joachim Bautsch, Joachim Bohm, Detlef Klimm: Introduction to crystallography . Oldenbourg Verlag, 2010, ISBN 978-3-486-59885-8 , pp. 263 ( books.google.de ).