of Optical Constants of Solids. Knief, Niessen (1999) Phys. See the pages of Crystran Ltd for the optical, physical and chemical characteristics of silicon, crystal quartz, and silica glass. Freeman, Paul (1979) Phys. Slowly rotate the crystal, for example, clockwise so the tip points to the right and then downward, around, and up again and notice how the color changes gradually between a darker yellow and a brighter red tone. Nevertheless quartz is a technically important material that is valued for the combination of certain electrical or optical properties with a great physical strength and chemical resistance. Lond. 29, 2001, Chandrasekharan, Damany (1968) Appl. Optical constants of amorphous carbon A collection of files with the optical constants of different amorphous carbon samples. Commun. Asterisk ( * ) -- Example: "elect*" retrieves documents containing "electron," "electronic," and "electricity", Question mark (?) Opt. Thesampleofquartz,27.915mminthickness,was not so highlypolishedasthe first specimen.This would cause more scatteringoflight, andan apparentlyhighextinction coef- 57(4) 543-544 (1967). 12, 398. Nat. Silicon (Si). The maximum birefringence occurs when the light passes perpendicular to the optical axis (Fig.5, with the amount of birefringence greatly exaggerated). 125, 968. 0000142196 00000 n Opt. Meet., U12.009. Its own electric and magnetic fields interact with the fields already present in the crystal. Pierce, Spicer (1972) Phys. This scale is in use because it is easy to memorize and because a comparative test is easy to do. 18, 215+221, Presby, Kaminov (1978) Appl. (1989) Mon. Phys. Rev. The optical axis in quartz corresponds to the c-axis of the unit cell, so there is no birefringence when light passes the crystal from tip to tip. or Am. Sp. J. Opt. Note: it is not possible to deduce the anisotropy of a specific physical property from the external crystal form. Phys. Use these formats for best results: Smith or J Smith, Use a comma to separate multiple people: J Smith, RL Jones, Macarthur. Sol. Brodsky et al. Phys. Soc. Sol. Silwet Super Spreaders, Super Penetrants and Multifuctional Adjuvants, * Silplusは、新日鉄住金化学株式会社の商標であり、許可を得て使用しています。, Call Regional Customer Service Representative, Momentive Silicone and Specialty Chemicals, View the index of refraction and IR transmission of fused quartz, View the average transmittance curves of fused quartz. 121, 1324. http://www.webmineral.com/data/Quartz.shtml. 16, 2002, Tan (1999) Physica B 262, 98; J. Non-Cryst. 29, 2715, Ershov, Lukirskii (1967) Sov. Wald, Salisbury (1995) J. Geophys. Specific indicators are the UV cutoff and the presence or absence of bands at 245 nm and 2.73 μm. out more and change our default settings. Mandatory cookies make the website usable by enabling basic functions. Sol. The optical constants of crystal quartz in the far infrared (10–400 cm−1) are presented along with the dispersion parameters for the two ordinary-ray bands measured in this study. Rev. 5. negative rhombohedron (z-face). Roy. 16, 2919, Zanzucchi et al. 168, 383, Adachi, Mori (2000) Phys. INTRODUCTION THE phenomenon of optical activity was discovered in the year 1811 by Arago in pieces of quartz eut perpendicular to the optic axis. By continuing to use this site, you agree to our use of cookies. Soc. Phys. Determination of refractive index of silica glass for infrared wavelengths by IR spectroscopy, J. Non-Cryst. Interspecimen comparison of the refractive index of fused silica, J. Opt. Sol. 0000000016 00000 n The next table lists a few refractive indices for comparison. Tan, Arndt (2000) J. Phys. You do not have subscription access to this journal. impact your experience of the site and the services we are able to offer. Tourmaline crystals had been used for a long time by traders from Holland to remove ash from their tobacco pipes (called "Aschentrekker"). (2000) Phys. 1. positive rhombohedron (r-face) Change the design and some of the measurable constants will change. Phys. Solids 223, 158-163 (1998) 3D - selected data for 3D artists, Book The physical and optical properties of quartz are outlined in Table 1. 70, 1513. [CSV - comma separated] In a crystal the atoms are arranged in a regular and periodic manner that is specific for each mineral. The problem in observing the color change is i) that the effect is very weak and ii) that one needs a clear double terminated crystal to compare the color of light passing parallel to the c-axis and perpendicular to it. 135, 86. Phys. He might even dispose of it in anger as he falsely assumes to be the victim of a fraud, or sue the innocent dealer. 55, 1205-1208 (1965)2) C. Z. Tan. (1987) Opt. A single ray of light is split up into two rays while it passes the rhombohedron. Soc. T = (1-R)2e –at Randall, Rawcliffe (1967) Appl. Poenar, Wolffenbuttel (1997) Appl. To practically observe this effect one needs to use monochromatic polarized light, light of a definite color in which all light waves oscillate in the same plane. 0000000556 00000 n Soc. (2002) Am. 338, 292. Because it is chemically inert and mechanically very enduring, it is nevertheless an attractive dielectric, and is used, for example, to separate electrical circuit elements inside computer chips.

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