Pinite

Fine-grained pseudomorphs after silicate minerals, especially cordierite, nepheline and scapolite. Mineralogically, "pinite" is primarily composed of mica (usually muscovite) and clay group minerals. First reported from Pini adit, Aue, Erzgebirge, Saxony, Germany.

Bibliography

• Cox et al. (1979): The Interpretation of Igneous Rocks, George Allen and Unwin, London.
• Howie, R. A., Zussman, J., & Deer, W. (1992). An introduction to the rock-forming minerals (p. 696). Longman.
• Le Maitre, R. W., Streckeisen, A., Zanettin, B., Le Bas, M. J., Bonin, B., Bateman, P., & Lameyre, J. (2002). Igneous rocks. A classification and glossary of terms, 2. Cambridge University Press.
• Middlemost, E. A. (1986). Magmas and magmatic rocks: an introduction to igneous petrology.
• Shelley, D. (1993). Igneous and metamorphic rocks under the microscope: classification, textures, microstructures and mineral preferred-orientations.
• Vernon, R. H. & Clarke, G. L. (2008): Principles of Metamorphic Petrology. Cambridge University Press.

Photo
Cordierite completely altered by pinite in a rhyolite from San Vincenzo (Italy). XPL image, 10x (Field of view = 2mm)	Cordierite completely altered by pinite in a rhyolite from San Vincenzo (Italy). PPL image, 10x (Field of view = 2mm)	Cordierite completely altered by pinite in a rhyolite from San Vincenzo (Italy). XPL image, 10x (Field of view = 2mm)
Cordierite completely altered by pinite in a rhyolite from San Vincenzo (Italy). XPL image, 10x (Field of view = 2mm)	Cordierite completely altered by pinite in a rhyolite from San Vincenzo (Italy). PPL image, 10x (Field of view = 2mm)	Cordierite completely altered by pinite in a rhyolite from San Vincenzo (Italy). XPL image, 10x (Field of view = 2mm)
Cordierite completely altered by pinite in a rhyolite from San Vincenzo (Italy). XPL image, 10x (Field of view = 2mm)