Extinction is a term used in optical mineralogy and petrology, which describes when cross-polarized light dims, as viewed through a thin section of a...

Optical mineralogy is the study of minerals and rocks by measuring their optical properties. Most commonly, rock and mineral samples are prepared as thin...

petrographic microscope Bird's eye extinction, in optical mineralogy Undulose extinction, a geological term Ewald–Oseen extinction theorem in optics, when light...

P–Tr) extinction event (PTME; also known as the Late Permian extinction event, the Latest Permian extinction event, the End-Permian extinction event,...

In optical mineralogy and petrography, a thin section (or petrographic thin section) is a thin slice of a rock or mineral sample, prepared in a laboratory...

Bird's eye extinction, or bird's eye maple, is a specific type of extinction exhibited by minerals of the mica group under cross polarized light of the...

Undulose extinction or undulatory extinction is a geological term referring to the type of extinction that occurs in certain minerals when examined in...

indicates the phase velocity, while the imaginary part κ is called the optical extinction coefficient or absorption coefficient—although κ can also refer to...

Orthoclase. List of minerals Schiller, optical effect Warr, L. N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...

eastonite. Biotite was regarded as a mineral species by the International Mineralogical Association until 1998, when its status was changed to a mineral group...

the latter relies on measuring the extinction angle under a polarizing microscope. The extinction angle is an optical characteristic and varies with the...

Flexible optical fiber bundle with an eyepiece on one end and a lens on the other Warr, L. N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine...

In mineralogy, this property is frequently exploited using polarization microscopes, for the purpose of identifying minerals. See optical mineralogy for...

The extinction cross is an optical phenomenon that is seen when trying to extinguish a laser beam or non-planar white light using crossed polarizers. Ideally...

rocks in the laboratory are through optical microscopy and by using an electron microprobe. In an optical mineralogy analysis, petrologists analyze thin...

naturally occurring sulphite. Mineral. Mag., 48, 283–288. Hudson Institute of Mineralogy, 2017, Scotlandite: https://www.mindat.org/min-3597.html (accessed November...

distinguished from those of the monoclinic series by their optical characteristics, such as straight extinction, much weaker double refraction and stronger pleochroism...

Environmental mineralogy and geochemistry of waste dumps at the Pb(Zn)-Ag Bottino mine, Apuane Alps, Italy. European Journal of Mineralogy: 12(2): 441–453...

from perpendicular. The dark bands correspond to positions where optical extinction (apparent isotropy) would be seen. In other words, the interference...

data on Webmineral Carminite in the Handbook of Mineralogy Gaines et al (1997) Dana's New Mineralogy, Eighth Edition. Wiley "Commission on New Minerals...

are made up of thin, flat, radiating, optically homogeneous crystals and seem to form in a parallel extinction and positive elongation. The cores of the...

orthoclase in many physical properties, and can be distinguished by x-ray or optical examination. When viewed under a polarizing microscope, microcline exhibits...

synchronous. The extinctions in South America appear to have occurred at least 400 years after the extinctions in North America. The extinction of woolly mammoths...

Minerals, Nomenclature and Classification (CNMNC) of the International Mineralogical Association (IMA) classifies it as a carbonate with the formula Zn3(CO3)(OH)4...

1167–1173 Gaines et al (1997) Dana’s New Mineralogy Eighth Edition. Wiley Webmineral data Mindat.org Handbook of Mineralogy Post, Heaney and Hanson (2003) American...

arsenate-antimonate mineral from Sardinia, Italy, European Journal of Mineralogy, v. 7, p. 1325-1330 Kolitsch, U, Slade, P.G., Tiekink, E.R.T, and Pring...

doi:10.1098/rspa.1924.0002. ISSN 0950-1207. Sinkankas, John (1964). Mineralogy for amateurs. Princeton, N.J.: Van Nostrand. pp. 371–372. ISBN 0442276249...

scandium.org/minerals-Sc.html (accessed November 2015). Hudson Institute of Mineralogy, 2015, Scandiobabingtonite: http://www.mindat.org/min-7278.html (accessed...

platey minerals like lepidomelane biotite, Parallel orientation of the optical axis of minerals like nepheline. Occurrence within zoned bodies, enveloped...

and LWIR spectral regions. Typical applications include biological, mineralogical, defence, and industrial measurements. Thermal infrared hyperspectral...