A spectroscopic and X-ray study of the coordination of Cr (super 3+) ions in chlorites

The spectra of iron in orthopyroxene revisited; the splitting of the ground state

The optical spectroscopic comparison of the ferric iron tetrameric clusters in amarantite and leucophosphite

Low-temperature optical absorption and Moessbauer spectra of staurolite and spinel

Ferrous-ferric interaction on adjacent face-sharing antiprismatic sites in vesuvianites; evidence for ferric ion in eight coordination

Nonmetamict nioboeschynite-(Ce) from Alaska

The magnetic circular dichroism of pyrope-almandine garnets

Joaquinite: The Nature of its Water Content and the Question of Four-Coordinated Ferrous Iron

Charge-transfer processes and the origin of colour and pleochroism of some titanium-rich vesuvianites

Nonmetamict nioboeschynite-(Ce) from Alaska

Twin laws versus electrical and optical characters in low quartz

A Pink Muscovite with Reverse Pleochroism from Archer's Post, Kenya

Charge-transfer spectra of Fe 3+ and Mn 2+ in synthetic forsterite (Mg 2 Si 4 )

Optical orientation and twinning of merwinite: A restudy

Visible and near-infrared absorption coefficients of montmorillonite and related clays

Identification of the Hydrated Iron Oxide Mineral Akaganéite in Apollo 16 Lunar Rocks

Biaxial color centers in amethyst quartz

Ferrous and ferric ions in synthetic α-quartz and natural amethyst

The optical absorption spectra of tourmaline; importance of charge-transfer processes

Optical absorption spectrum of Ni (super 2+) in garnierite; a discussion