Near-infrared absorption properties of oxygen-rich stardust analogs - The influence of coloring metal ions

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Volume 526 (February 2011)

A&A, 526 (2011) A68

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Table 3

Compositions of the samples and thicknesses of the platelets examined in this paper.

Sample	Chemical composition	Thickness	Crystal symmetry

Natural Spinel^†	Mg_1.02Al_1.93Cr_0.0087Fe_0.012O₄	250 μm	cubic
Synth. Spinel 1	Mg_1.00Al_1.98Cr_0.02O₄	80 μm	cubic
Synth. Spinel 2	Mg_0.93Al_1.99Cr_0.03O₄	270 μm	cubic
Synth. Spinel 3	Mg_0.98Al_1.89Cr_0.12O₄	120 μm	cubic
Synth. Spinel 4	Mg_0.98Al_1.78Cr_0.23O₄	80 μm	cubic
Natural Rutile^†	Ti_0.984V_0.008Fe_0.008O₂	155 μm	tetragonal
Natural Anatase	Ti_0.992V_0.008O₂	255 μm	tetragonal
Olivine San Carlos	Mg_1.96Fe_0.16Si_0.89O₄	1063/1115 μm	orthorhombic
Olivine Sri Lanka	Mg_1.56Fe_0.4Si_0.91O₄	300 μm	orthorhombic

Notes.

^†

The natural spinel and rutile samples have small (<1%) OH contents that are not shown in the formula.

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