The "amber centres" and their relation to the brown colour in diamond

TY - JOUR

T1 - The "amber centres" and their relation to the brown colour in diamond

AU - Massi, L

AU - Fritsch, E

AU - Collins, A T

AU - Hainschwang, T

AU - Notari, F

PY - 2005/10

Y1 - 2005/10

N2 - The amber centres are a series of similar near-infrared absorptions found in brown "amber"-coloured diamonds. These centres are found exclusively in crystals showing lamellae of plastic deformation ("brown graining") and nitrogen in the form of A-aggregates, at least. They represent likely electronic transitions responsible for up to six zero-phonon lines and associated vibronic structures. Four different categories may be distinguished. The most common one is proposed to be caused by a "defective" A-aggregate. (c) 2005 Elsevier B.V. All rights reserved

AB - The amber centres are a series of similar near-infrared absorptions found in brown "amber"-coloured diamonds. These centres are found exclusively in crystals showing lamellae of plastic deformation ("brown graining") and nitrogen in the form of A-aggregates, at least. They represent likely electronic transitions responsible for up to six zero-phonon lines and associated vibronic structures. Four different categories may be distinguished. The most common one is proposed to be caused by a "defective" A-aggregate. (c) 2005 Elsevier B.V. All rights reserved

U2 - 10.1016/j.diamond.2005.05.003

DO - 10.1016/j.diamond.2005.05.003

M3 - Article

VL - 14

SP - 1623

EP - 1629

JO - DIAMOND AND RELATED MATERIALS

JF - DIAMOND AND RELATED MATERIALS

IS - 10

ER -