All Articles tagged nebular condensation

• Science Paper
  January 01, 2022 EDT
  Temperatures of Canonical Condensation: Constraints From CAIs
  Richard O. Sack

  The analogy between Al8/3O4 – MgAl2O4 spinels and AgSbS2 − PbS galenas is explored. Although the spinel observed in calcium-aluminum-rich inclusions in carbonaceous chondrites (CAIs) is nearly pure MgAl2O4 and...

  Abstract
• Science Paper
  April 01, 2021 EDT
  Thermochemistry of Melilites I. Towards Resolving an Inconsistency in Nebular Condensation Calculations
  Richard O. Sack

  A thermodynamic model is formulated for (Ca,Na)2(Mg,Fe2+,Al,Fe3+)T1 (Al,Fe3+,Si$)_{2}^{\textbf{T2}}$O7 melilites. It employs the compositional vertices: åkermanite (Ca2MgSi2O7, 1), gehlenite (Ca2Al2SiO7, 2), iron åkermanite (Ca2Fe2+Si2O7, 3), ferrigehlenite (Ca2$\text{Fe}_{2}^{3\, + \,}$SiO7, 4), sodium...

  Abstract