Thermal evolution and sintering of chondritic planetesimals - III. Modelling the heat conductivity of porous chondrite material

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Table 2

Pure mineral species considered for calculating the properties of chondrite material, their chemical composition, atomic weight A, mass-density ϱ and thermal conductivity at 300 K.

Solid solution	Chemical	A	ϱ	K
component	formula		g/cm³	W/mK


Olivine
forsterite	Mg₂SiO₄	140.69	3.22	5.158^a
fayalite	Fe₂SiO₄	203.78	4.66	3.161^a
Orthopyroxene
enstatite	MgSiO₃	100.39	3.20	4.961^a
ferrosilite	FeSiO₃	132.32	3.52	3.352^d
Clinopyroxene
wollastonite	Ca₂Si₂O₆	116.16	2.91	4.032^a
(+ en + fs)
Plagioclase
anorthite	CaAl₂Si₂O₈	277.41	2.75	1.679^a
albite	NaAlSi₃O₈	263.02	2.63	2.349^a
orthoclase	KAlSi₃O₈	278.33	2.55	2.315^a
Iron-nickel alloy
iron	Fe	55.45	7.81	71.100^c
nickel	Ni	58.69	8.91	80.800^c
Troilite	FeS	87.91	4.91	4.60^b

Notes. They form the indicated solid solutions.

^(a)

Horai & Simmons (1969);

^(b)

Clauser & Huenges (1995);

^(c)

Ho et al. (1978);

^(d)

extrapolated value from Horai & Baldridge (1972).

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