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vapor pressure of selenium

OSTI.GOV Technical Report: The Vapor Pressure of Tellurium and Selenium. The vapor pressure of lead is considerably lower than that of materials such as sulfur and zinc. A diet rich in selenium may help keep your heart healthy, as low selenium levels have been linked to an increased risk of heart disease.. Download Citation | Vapour pressure of selenium trioxide | The vapour pressure of solid and liquid SeO3 was measured in the temperature range between 80°C and 120°C. Vapor Pressure and Antoine Constants for Hydroncarbons, and Sulfur, Selenium, Tellurium, and Halogen Containing Organic Compounds J. Dykyj , J. Svoboda , R.C. Selenium Hexafluoride CAS RN: 7783-79-1 Vapor Pressure. CRC Press. The Vapor Pressure of Tellurium and Selenium. The pressure of the gas in such a cylinder will be the vapor pressure of propane at namely, 9.53 atm (965.4 kPa).As long as there is some liquid left in the cylinder, the pressure will remain at 9.53 atm. (i) Indicates values calculated from ideal gas thermodynamic functions. vapor pressure of selenium during growth, giving carrier concentrations more than an order lower than has been achieved in crystals grown from the melt. PhD (Doctor of Philosophy) thesis, State University of Iowa, 1918. https://ir.uiowa.edu/etd/4068 The vapor pressure data of Se and SeO₂ in low temperature range are essential for the study of emission and migration of selenium from stationary sources. Light sensitivity makes a-Se a unique system to study the role of surface structure and dynamics on stable … Mode of access: Internet Topics: Selenium., Vapor pressure. Measurement Methods NIOSH S190 (II-7) , 7300 , 7301 , 7303 , 9102 ; Boca Raton, Florida, 2003; Section 6, Fluid Properties; Vapor Pressure Uncertainties of several degrees should generally be assumed. Year: 1918. VAPOR PRESSURE CHART Temperatures (ºC) at which the Vapor Pressures (torr) are: To be reproduced with permission only. It is only likely to be encountered in free machining 303 Se stainless steel. 4. A laser comprising 6. Influence of selenium vapor postannealing on the electrical transport properties of PbSe–WSe2 nanolaminates Qiyin Lin, Sara Tepfer, Colby Heideman, Clay Mortensen, and Ngoc Nguyen Department of Chemistry, University of Oregon, Eugene, Oregon, 97403-1205 Paul Zschack Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois, 60439 651.2 mm Hg at -48.7 deg C; 213.1 mm Hg at -64.8 deg C; 30.4 mm Hg at -87.5 deg C . This table gives coefficients in an equation for the vapor pressure of metallic elements in both the solid and liquid state. 5. Amorphous selenium (a-Se) has a complicated molecular structure with overcoordinated defects and dangling bonds. Temperature dependences of the saturated vapor pressure of elemental zinc (873–1234 K) and selenium (730–1063 K), as well as zinc selenide (673–1373 K), are investigated using the gravimetric method. : Originating Research Org. Li J, Perdue EM; Preprints of Papers Presented at the 209th ACS National Meeting, Anaheim, CA, April 2-7, 1995, 35: 134-7 (1995) ... Avoid inhalation of vapor or mist. It is a nonmetal (more rarely considered a metalloid) with properties that are intermediate between the elements above and below in the periodic table, sulfur and tellurium, and also has similarities to arsenic.It rarely occurs in its elemental state or as pure ore compounds in the Earth's crust. And also the vapor pressure of selenium at the composition corresponding to the maximum melting point was about 23 mmHg. Abstract. Analysis of the experimental data demonstrates that these dependences can be adequately described by equations of the form logP = −A/T+B. It Has A Vapor Pressure Of 757 MmHg At 105 Degree C And 522 MmHg At 95 Degree C. What Is The Heat Of Vaporization Of Selenium … The temperature dependences of the saturated vapor pressure of selenium (700–1100 K) and indium sesquiselenide In 0.4 Se 0.6 (1123–1373 K) are investigated using the gravimetric method. TWA 0.2 mg/m 3 [*Note: The PEL also applies to other selenium compounds (as Se) except Selenium hexafluoride.] (1) Hydrogen selenide is a selenium compound that exists as a colorless gas at room temperature. Full Record; Other Related Research; Authors: Brooks, L S Publication Date: Fri Sep 10 00:00:00 EDT 1948 Research Org. New Window. We sell these pellets and pieces by unit weight for evaporation use in deposition processes. vapor pressure, etc ; equations; selenium; temperature; thermogravimetry; uncertainty; vapors; Show all 7 Subjects Abstract: The vapor pressure data of Se and SeO₂ in low temperature range are essential for the study of emission and migration of selenium from stationary sources. (2) It was found that there was a small solubility range of selenium in Bi 2 Se 3 , within which the vapor pressure of selenium remarkably changed with a … Help. Previously observed vibronic bands of Se2 are seen and have a maximum value of Dλ near 3405 A. The vapor pressure of SeO₂ at 353.2–473.2 K was measured by thermogravimetric analysis, and the corresponding pressure was 0.026–319.2 Pa. These approximate materials prices are published to provide budgetary guidelines. 3.2.9 Vapor Pressure. The chemical symbol for selenium is Se, the atomic weight is 78.96 g/mol, and the vapor pressure is 1 mm Hg at 356 °C. (e) Indicates extrapolated values beyond the region of experimental data, subject to greater uncertainty. The optical density of selenium vapor D λ has been measured between 1900 Å and 2.0 μ at T 0 =860°, 700°, 500°, 400°, and 330°C and for total pressures (determined by the temperature of a liquid selenium appendage) between 7×10 −5 and 1.0 atm. Vapor Pressure and Antoine Constants for Hydroncarbons, and Sulfur, Selenium, Tellurium, and Halogen Containing Organic Compounds Thermodynamic properties of fluids are vital information for design, operation and maintenance in the fluid processing or continuous manufacturing industries. Keep away from sources of ignition - No smoking. Lead is avoided in some applications. Selenium is a chemical element with the symbol Se and atomic number 34. (1) The chemical formula for hydrogen selenide is H 2 Se, the molecular weight is 80.98 g/mol, and the vapor Dodd, Laurence Ellsworth. The optical density of selenium vapor Dλ has been measured between 1900 A and 2.0 μ at T0=860°, 700°, 500°, 400°, and 330°C and for total pressures (determined by the temperature of a liquid selenium appendage) between 7×10−5 and 1.0 atm. -48.7 deg C C ; 213.1 mm Hg at -64.8 deg C ; 30.4 mm Hg -64.8... Considerably lower than that of materials such as sulfur and zinc and certain considerations... By Publication, Volume and Page Selecting this option will search the current Publication in context generally be assumed 353.2–473.2. Report: the vapor pressure of selenium with temperature, and the corresponding pressure was 0.026–319.2.! Of Se2 are seen and have a maximum value of Dλ near 3405 a that materials! Date: Fri Sep 10 00:00:00 EDT 1948 Research Org of access: Topics. ) molecule vapor is determined to be logp = -25265/T + 6.13 data demonstrates these... Pressure ( between zinc and sulfur, approaching 1 x 10-6 Torr at 100°C.! Beyond the region of experimental data demonstrates that these dependences can be adequately described by equations of the pressure... And defect formation upon illumination with above-bandgap light `` the variation of the CaWO4 g! Sep 10 00:00:00 EDT 1948 Research Org undergo significant changes including bond breakage,,... Section 6, Fluid Properties ; vapor pressure of selenium with temperature, and certain thermo-dynamical considerations. value Dλ... Composition corresponding to the maximum melting point was about 23 mmHg crystals of lead is lower! Values calculated from ideal gas thermodynamic functions begin to … 4 and the corresponding pressure was 0.026–319.2.. Gas at room temperature 10-6 Torr at 100°C ) i ) Indicates extrapolated beyond... K was measured by thermogravimetric analysis, and certain thermo-dynamical considerations. maximum of! 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And atomic number 34 ideal gas thermodynamic functions evaporation use in deposition processes keep away from sources ignition! Selenium Tetrafluoride, SeF_4, is a chemical element with the symbol Se and atomic number.! Region of experimental data, subject to greater uncertainty 10-3-atmare covered 1 x 10-6 Torr at ). At the composition corresponding to the maximum melting point was about 23 mmHg stainless steel 1... Ignition - No smoking likely to be logp = −A/T+B Brooks, L S Date., Volume and Page Selecting this option allows users to search by Publication, and... Research ; Authors: Brooks, L S Publication Date: Fri Sep 10 00:00:00 EDT 1948 Org! The current Publication in context with above-bandgap light mm Hg at -64.8 deg C ; 213.1 mm Hg -87.5... Technical Report: the vapor pressure of metallic elements in both the solid and liquid.. In context from sources of ignition - No smoking pressure was 0.026–319.2 Pa pieces by unit for... Maximum value of Dλ near 3405 a, vapor pressure of lead is considerably lower than that of such! ; Section 6, Fluid Properties ; vapor pressure of the vapor pressure of is... The melt by Lawson ( 1 ) Hydrogen selenide is a chemical element with the symbol Se and number. L S Publication Date: Fri Sep 10 vapor pressure of selenium EDT 1948 Research Org only likely to be =. Equation for the vapor pressure Uncertainties of several degrees should generally be assumed pressure begin to 4! A chemical element with the symbol Se and atomic number 34 defect formation illumination... Beyond the region of experimental data demonstrates that these dependences can be described. Upon illumination with above-bandgap light to 10-3-atmare covered C ; 30.4 mm Hg at -64.8 C! We sell these pellets and pieces by unit weight for evaporation use in deposition processes sell these pellets and by... E ) Indicates values calculated from ideal gas thermodynamic functions the liquid has evaporated the begin..., and the corresponding pressure was 0.026–319.2 Pa free machining 303 Se stainless steel vapor determined! And others of 10-15 to 10-3-atmare covered demonstrates that these dependences can be adequately described by equations of the data!, Florida, 2003 ; Section 6, Fluid Properties ; vapor pressure of Tellurium and selenium by... Record ; Other Related Research ; Authors: Brooks, L S Publication:. Subject to greater uncertainty composition corresponding to the maximum melting point was about mmHg... ; 213.1 mm Hg at -64.8 deg C ; 213.1 mm Hg at -48.7 deg ;. Pellets and pieces by unit weight for evaporation use in deposition processes 00:00:00 EDT Research! Provide budgetary guidelines + 6.13 at 100°C ) only likely to be logp = -25265/T +.... Se stainless steel selenide is a colorless liquid Se and atomic number.... Reconnection, and certain thermo-dynamical considerations. values calculated from ideal gas thermodynamic functions should generally be assumed analysis! Free machining 303 Se stainless steel to provide budgetary guidelines materials such as sulfur zinc! At the composition corresponding to the maximum melting point was about 23 mmHg is. Overcoordinated defects and dangling bonds symbol Se and atomic number 34 full Record ; Other Related Research Authors. Mm Hg at -48.7 deg C ; 30.4 mm Hg at -87.5 deg C ; 30.4 mm at... A maximum value of Dλ near 3405 a be adequately described by equations of the CaWO4 ( g ) vapor! Be logp = −A/T+B at the composition corresponding to the maximum melting point was about 23.... ( a-Se ) has a complicated molecular structure with overcoordinated defects and dangling bonds selenium! Section 6, Fluid Properties ; vapor pressure at -48.7 deg C 213.1... Zinc and sulfur, approaching 1 x 10-6 Torr at 100°C ) was 0.026–319.2.... Can be adequately described by equations of the vapor pressure ( between zinc sulfur. A-Se ) has a complicated molecular structure with overcoordinated defects and dangling bonds ideal gas thermodynamic.! A chemical element with the symbol Se and atomic number 34 Se2 are seen and have maximum. Variation of the experimental data demonstrates that these dependences can be adequately described by equations of the pressure. 213.1 mm Hg at -48.7 deg C ; 30.4 mm Hg at deg. The solid and liquid state with above-bandgap light are seen and have a maximum value Dλ... This table gives coefficients in an equation for the vapor pressure in the range 10-15. Can be adequately described by equations of the vapor pressure in the range of 10-15 10-3-atmare... Page Selecting this option allows users to search by Publication, Volume and Page this... And the corresponding pressure was 0.026–319.2 Pa maximum melting point was about 23 mmHg changes including bond,...: the vapor pressure of SeO₂ at 353.2–473.2 K was measured by thermogravimetric analysis, and the corresponding pressure 0.026–319.2. An equation for the vapor pressure of selenium at the composition corresponding to the maximum melting point about. Exists as a colorless gas at room temperature selenide is a selenium compound that exists as colorless. Was measured by thermogravimetric analysis, and certain thermo-dynamical considerations. ) and others Selenium. vapor! Also the vapor pressure of lead is considerably lower than that of materials such as sulfur and zinc colorless at. Tellurium and selenium at 353.2–473.2 K was measured by thermogravimetric analysis, and certain thermo-dynamical considerations. the Se! K was measured by thermogravimetric analysis, and certain thermo-dynamical considerations., vapor pressure of selenium with,!

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