Alamosite

Formula : PbSiO₃

Family:

Space group:

Monoclinic - Domatic HM symbol (m) Space Group: Pn

Dana class:

65.7.1.1VIII- 65 Inosilicate Minerals ; 65.7 Inosilicates Inosilicate Single-Width Unbranched Chains, W=1 with chains P>7 ; 65.7.1

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
283.284	43.650 (Ref.: 94pan) Pankratz L. B., 1994, Thermodynamic Properties of Carbides, Nitrides, and Other Selected Substances (U. S. Bureau of Mines Bulletin 696, 1994, 957 p).	-1061091 (Ref.: Internal calculation)	-1144993 (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.	109.930 (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.	90.06 (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.
90.11	54.44	-14.47	(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

Alamosite + 2H⁺ + H₂O ⇌ Pb⁺² + H₄SiO₄

298.15 K, 1 bar log₁₀K: 6.18 ΔH°_r:-27117 J·mol^-1

T(°C)	0	25	60	100	150	200	250	300
log₁₀K	6.57	6.18	5.65	5.13	4.61	4.17	3.77	3.37

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

A	B	C	D	E
-646.424204	-0.087125	40360.344036	230.919894	-2505739.783269