Dinickel orthosilicate

Crystal structure
M1, M2: Ni 2+
General
Surname	Dinickel orthosilicate
other names	Nickel (II) silicate Nickel (II) orthosilicate
Ratio formula	Ni 2 SiO 4
Brief description	green solid
External identifiers / databases
CAS number 13775-54-7 EC number 237-411-1 ECHA InfoCard 100.033.996 PubChem 15531081 Wikidata Q18212010
properties
Molar mass	209.46 g mol −1
Physical state	firmly
density	5.8 g cm −3
Melting point	1575 ° C
solubility	practically soluble in water and slightly soluble in hydrochloric acid
safety instructions
GHS labeling of hazardous substances danger H and P phrases H: 350i-372-317-410 P: ?
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Dinickel orthosilicate is an inorganic chemical compound of nickel from the group of silicates . It is the only stable silicate in nickel.

Occurrence

Dinickel orthosilicate occurs naturally in the form of the mineral Liebenbergite .

Extraction and presentation

Dinickel orthosilicate can be obtained by reacting nickel with silicon dioxide and oxygen .

${\displaystyle \mathrm {2\ Ni+SiO_{2}+O_{2}\longrightarrow Ni_{2}SiO_{4}} }$

It can also be made by reacting sodium silicate with nickel (II) nitrate .

${\displaystyle \mathrm {Na_{2}SiO_{3}+2\ Ni(NO_{3})_{2}+H_{2}O\longrightarrow Ni_{2}SiO_{4}+2\ HNO_{3}+2\ NaNO_{3}} }$

properties

Dinickel orthosilicate is a gray to green solid that is practically insoluble in water. It has an orthorhombic crystal structure of the olivine type with the space group Pbnm (space group no. 62, position 3) . At higher temperatures and pressures, this transforms into a cubic spinel structure with the space group Fd 3 m (space group no. 227) .

Individual evidence

1. ^ ^{A b c} F. Singer: Industrial Ceramics . Springer, 2013, ISBN 978-94-017-5257-2 , pp. 174 ( limited preview in Google Book search).
2. ↑ ^{a b} Entry on dinickel orthosilicate in the GESTIS substance database of the IFA , accessed on July 23, 2016(JavaScript required) .
3. ↑ ^{a b c} E. Yu Tonkov: High Pressure Phase Transformations Handbook 1 . CRC Press, 1992, ISBN 978-2-88124-758-3 , pp. 590 ( limited preview in Google Book search).
4. ↑ ^{a b} OECD: Chemical Thermodynamics of Nickel . Elsevier, 2005, ISBN 0-08-045754-1 , pp. 242 ( limited preview in Google Book search).
5. ^ William Alexander Deer, Robert Andrew Howie, J. Zussman: Rock-Forming Minerals: Orthosilicates, Volume 1A . Geological Society of London, 1982, ISBN 978-1-897799-88-8 , pp. 161 ( limited preview in Google Book search).
6. ↑ Jun YATABE, Minoru KUMADA, Tsuneo IKAWA, Toshifumi KAGEYAMA: Synthesis of Nickel Silicate Using Nickel Nitrate and Water Glass as Raw Materials. In: Journal of the Ceramic Society of Japan. 103, 1995, p. 293, doi : 10.2109 / jcersj.103.293 .
7. ↑ Pierre Villars, Karin Cenzual, Roman Gladyshevskii: Handbook . Walter de Gruyter GmbH & Co KG, 2015, ISBN 978-3-11-031174-7 , p. 727 ( limited preview in Google Book search).
8. ↑ Takamitsu Yamanaka: Crystal structures of Ni ₂ SiO ₄ and Fe ₂ SiO ₄ as a function of temperature and heating duration. In: Physics and Chemistry of Minerals. 13, 1986, p. 227, doi : 10.1007 / BF00308273 .
9. ↑ O. Tamada, K. Fujino, S. Sasaki: Structures and electron distributions of α-Co2SiO4 and α-Ni ₂ SiO ₄ (olive structure). In: Acta Crystallographica Section B Structural Science. 39, p. 692, doi : 10.1107 / S0108768183003250 .