Condensation in Dust-enriched Systems, by D.S. Ebel and L. Grossman,
Geochimica et Cosmochimica Acta, 1999

Results: General Effects of Dust Enrichment and Total Pressure

Complete condensation calculations were performed from 2400K down to the last temperature step where our criteria for adequate convergence could be met, usually between 1100 and 1300K, and up to dust/gas enrichment factors of 1000x relative to solar composition, hereinafter abbreviated as "dust enrichments of 1000x". The extremes of 10^-3 bar and 10^-6 bar were chosen to bracket the generally accepted range of P^tot in the inner solar nebula (Wood and Morfill, 1988). Results are shown at four different dust enrichments at 10^-6 bar in Table 7 and at 10^-3 bar in Table 8. In these tables, appearance and disappearance temperatures are defined as the highest temperature steps at which a phase is either part of or becomes absent from the stable condensate assemblage. In figures showing elemental distributions among coexisting phases, the fraction of an element present in a phase at its appearance temperature is extrapolated to zero in the next highest temperature step.

Dust/Gas Enrichment:	1x				500x		1000x
Table 7. Temperatures (K) of appearance and disappearance of condensates at P^tot = 10^-6 bar as a function of dust/gas enrichment.
Condensate	In	Out	In	Out	In	Out	In	Out
Corundum	1570	1470	1890	1790	2010	1930	2040	1980
Hibonite	1480	1430	1790	1750	1940	1890	1980	1950
Perovskite	1460	1270	1690	1500	1760	1610	1740	1670
Grossite	1440	1370	1760	1650	1910	1780	1960	1820
CaAl₂O₄	1390	1360	1680	1620	1820	1740
Melilite	1370	1250	1630	1470	1760	1740
Grossite	1360	1300	1620	1550	1740	1670
Liquid					1740	1730	1880	1370
Melilite					1730	1630
Hibonite	1320	1270	1550	1540
Spinel	1270	1210	1540	1430	1670	1610	1720	1660
Liquid					1630	1390
Clinopyroxene	1270		1500		1430		1370
Olivine	1240		1490		1610		1660
Sapphirine	1230	1190
Metallic nickel-iron	1210		1360		1420		1430
Plagioclase	1210	1190	1440	1300	1450		1410
Cordierite	1200		1310
Orthopyroxene	1190		1400		1490		1530	1230
Cr-spinel	1160		1410		1610		1660
Pyrophanite			1130		1230		1250
MnO			1090		1180		1210
End of Computation	1100		1090		1160		1200

Dust/Gas Enrichment:	1x				500x		1000x
Table 8. Temperatures (K) of appearance and disappearance of condensates at P^tot = 10^-3 bar as a function of dust/gas enrichment.
Condensate	In	Out	In	Out	In	Out	In	Out
Liquid			2200	1390	>2400	1400	>2400	1310
Corundum	1770	1720
Hibonite	1720	1680
Grossite	1690	1590
Perovskite	1680	1450	1970	1810
CaAl₂O₄	1620	1560
Melilite	1580	1430
Grossite	1560	1500
Hibonite	1500	1480
Spinel	1480	1400	1830	1710	1990	1940	2050	1990
Metallic nickel-iron	1460		1690		1780		1800
Clinopyroxene	1450		1440		1420		1390
Olivine	1440		1780		1940		1990
Plagioclase	1400	1310	1450		1430		1430
Orthopyroxene	1360		1620		1700
ß-Ti₃O₅	1360	1340
Cordierite	1330
Cr-spinel	1230		1600		1760		1710
Pyrophanite			1350		1400		1380
MnO			1300		1420		1480
Pyrrhotite					1330		1380
Whitlockite							1350
End of Computation	1210		1200		1240		1260

CONDENSATION
in
DUST-ENRICHED SYSTEMS

Denton S. Ebel (1)

Lawrence Grossman(1,2)

(1) Department of The Geophysical Sciences
The University of Chicago
5734 South Ellis Ave.
Chicago, IL 60637

(2) Enrico Fermi Institute
The University of Chicago
5640 South Ellis Ave.
Chicago, IL 60637

Submitted December 22, 1998 to

Geochimica et Cosmochimica Acta

Revised version submitted June 30, 1999

Abstract

Introduction
Technique

Bulk Composition

Method of Calculation

Data for Elements and Gas Species

Data and Models for Solids

Data and Models for Silicate Liquids

Test of MELTS: Peridotite KLB-1

Transition Between Liquid Models

Results

Vapor of Solar Composition

General Effects of Dust Enrichment and Total Pressure