Californium (III) oxychloride

Crystal structure
	__ Cf 3+ __ Cl - __ O 2−
Crystal system	tetragonal
Lattice parameters	a = 396 pm; c = 666 pm
General
Surname	Californium (III) oxychloride
other names	Californium (III) chloride oxide ( IUPAC )
Ratio formula	CfOCl
External identifiers / databases
Wikidata	Q904529
properties
Molar mass	302.45 g mol −1
Physical state	firmly
Hazard and safety information
	; Radioactive
GHS hazard labeling ; no classification available
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 .

Californium (III) oxychloride (CfOCl) was prepared by hydrolysis of the hydrate of californium (III) chloride (CfCl ₃ ) at 280-320 ° C. It has a tetragonal structure (PbFCl type) with a = 395.6 ± 0.2 pm and c = 666.2 ± 0.9 pm.

The enthalpy of solution of CfOCl in 1.022 M hydrochloric acid (HCl) was measured calorimetrically according to the equation: CfOCl _(cr) + 2 HCl _(sln) → CfCl _{3 (sln)} + H ₂ O _(sln) . The standard enthalpy of formation (Δ _fH ⁰ ) at 298 K was calculated to be −920 ± 7 kJ mol ⁻¹ .

safety instructions

Classifications according to the CLP regulation are not available because they only include chemical hazard and play a completely subordinate role compared to the hazards based on radioactivity . The latter also only applies if the amount of substance involved is relevant.

Individual evidence

↑ The hazards emanating from radioactivity do not belong to the properties to be classified according to the GHS labeling. With regard to other hazards, this substance has either not yet been classified or a reliable and citable source has not yet been found.
↑ JC Copeland, BB Cunningham: Crystallography of the Compounds of Californium. II. Crystal Structure and Lattice Parameters of Californium Oxychloride and Californium Sesquioxide , in: J. Inorg. Nucl. Chem. , 1969 , 31 (3), pp. 733-740 ( doi: 10.1016 / 0022-1902 (69) 80020-5 ).
↑ JB Burns, RG Haire, JR Peterson: Enthalpy of Solution of Californium Oxychloride; Calculation of the Standard Enthalpy of Formation of CfOCl , in: Journal of Alloys and Compounds , 1998 , 271-273 , pp. 676-679 ( doi: 10.1016 / S0925-8388 (98) 00185-6 ).

literature

Richard G. Haire: Californium , in: Lester R. Morss, Norman M. Edelstein, Jean Fuger (Eds.): The Chemistry of the Actinide and Transactinide Elements , Springer, Dordrecht 2006; ISBN 1-4020-3555-1 , pp. 1499-1576 ( doi: 10.1007 / 1-4020-3598-5_11 ).

[NV-1] The hazards emanating from radioactivity do not belong to the properties to be classified according to the GHS labeling. With regard to other hazards, this substance has either not yet been classified or a reliable and citable source has not yet been found.

[CF_OX_CL_1969-2] JC Copeland, BB Cunningham: Crystallography of the Compounds of Californium. II. Crystal Structure and Lattice Parameters of Californium Oxychloride and Californium Sesquioxide , in: J. Inorg. Nucl. Chem. , 1969 , 31 (3), pp. 733-740 ( doi: 10.1016 / 0022-1902 (69) 80020-5 ).

[3] JB Burns, RG Haire, JR Peterson: Enthalpy of Solution of Californium Oxychloride; Calculation of the Standard Enthalpy of Formation of CfOCl , in: Journal of Alloys and Compounds , 1998 , 271-273 , pp. 676-679 ( doi: 10.1016 / S0925-8388 (98) 00185-6 ).