Chloromagnesite

Formula : MgCl₂

Family:

Space group:

Trigonal - Hexagonal Scalenohedral HM symbol (-3 2/m) Space Group: R 3m

Dana class:

9.2.3.3IV- 9 Halide Minerals ; 9.2 Anhydrous and Hydrated Halides where A(?)2 ; 9.2.3

High temperature:

(Chloromagneesite)

Dernière mise à jour le 25.01.2021

Individual properties (298.15 K)

M g·mol^-1	V° cm³·mol^-1	ΔGº_f J·mol^-1	ΔHº_f J·mol^-1	Sº J·mol^-1·k^-1	C_P J·mol^-1·K^-1
95.210	40.810 (Ref.: 95rob/hem) Robie R.A., and Hemingway B.S., 1995. Thermodynamic properties of minerals and related substances at 298.15 K and 1 Bar (105 Pascals) pressure and at higher temperatures. U.S. Geol. Survey Bull., 2131, 461 pp.	-592091 (Ref.: Internal calculation)	-641620 (Ref.: 98cha) Chase, M.W.J., 1998. NIST-JANAF Thermochemical Tables, Journal of Physical Chemistry Reference Data, Vol. 9, 4th Edition. National Institute of Standards and Technology, Washington DC, 1951 pp.	89.630 (Ref.: 98cha) Chase, M.W.J., 1998. NIST-JANAF Thermochemical Tables, Journal of Physical Chemistry Reference Data, Vol. 9, 4th Edition. National Institute of Standards and Technology, Washington DC, 1951 pp.	71.38 (Ref.: 98cha) Chase, M.W.J., 1998. NIST-JANAF Thermochemical Tables, Journal of Physical Chemistry Reference Data, Vol. 9, 4th Edition. National Institute of Standards and Technology, Washington DC, 1951 pp.

C_P(T) = a + b·T + ·c·T^-2 (T in Kelvin)

a J·mol^-1·K^-1	*b 10³** J·mol^-1·K^-2	*c 10^-5** J·K·mol^-1	Maier Kelley Ref.
71.38	0.00	0.00	(Ref.: 98cha) Chase, M.W.J., 1998. NIST-JANAF Thermochemical Tables, Journal of Physical Chemistry Reference Data, Vol. 9, 4th Edition. National Institute of Standards and Technology, Washington DC, 1951 pp.

Reaction properties

Chloromagnesite ⇌ 2Cl^- + Mg⁺²

298.15 K, 1 bar log₁₀K: 22.03 ΔH°_r:-159540 J·mol^-1

T(°C)	0	25	60	100	150	200	250	300
log₁₀K	24.51	22.03	19.00	16.04	12.89	10.11	7.51	4.84

log₁₀K(T) = A + B·T + C·T^-1 + D·log₁₀(T) + E·T⁻² (T in Kelvin)

A	B	C	D	E
-1587.381883	-0.256066	94920.387298	576.131800	-5174659.734826