NIST has recently established a Surface Analysis data Center to give greater visibility to its databases developed for applications in surface analysis. Two databases are currently available for this purpose, and a th...
NIST has recently established a Surface Analysis data Center to give greater visibility to its databases developed for applications in surface analysis. Two databases are currently available for this purpose, and a third will be released soon. These three databases are described briefly here. Version 2.0 of the popular X-ray Photoelectron Spectroscopy database (SRD 20) was released in 1997. This database has long been a valuable resource of binding-energy and related data for the surface analysis of a wide range of materials by x-ray photoelectron spectroscopy (XPS). Version 2.0 contains about 16,000 line positions, chemical shifts, and splittings. Pull-down menus are now available to initiate searches for the identification of unknown lines, to retrieve data on core-level binding energies, to retrieve data on chemical shifts, to initiate searches for compounds containing selected elements or for specified material classes, to perform searches based on compound names and other fields, and to display Wagner *** 1 of the Elastic-Electron-Scattering Cross-Section database (SRD 64) was released in 1996. This database provides differential and total elastic-electron-scattering cross sections for simulations of signal-electron transport in XPS and Auger-electron spectroscopy (AES). Such simulations are important in the development of improved methods for correcting for elastic-electron-scattering effects in quantitative surface analyses by AES and XPS and for separating chemical information from effects due to the complex morphologies of semiconductor structures. Cross sections are given for all elements and for electron energies between 50 and 9,999 eV. The Electron Inelastic-Mean-Free-Path database (SRD 71) will be released in 1998. This database contains calculated and measured inelastic mean free paths (IMFPs) that are needed for quantitative surface analyses by AES and XPS. The IMFPs are available for elements, inorganic compounds, and organic compounds as
The thermodynamic and spectroscopic properties of the iodine oxide species have been reviewed. Recommended NIST-JANAF Thermochemical Tables are given for six gaseous iodine oxides: IO, OIO, IOO, IOI, IIO, and IO3. Suf...
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The thermodynamic and spectroscopic properties of the iodine oxide species have been reviewed. Recommended NIST-JANAF Thermochemical Tables are given for six gaseous iodine oxides: IO, OIO, IOO, IOI, IIO, and IO3. Sufficient information is not available to generate thermochemical tables for any condensed phase species. Annotated bibliographies (over 400 references) are provided for all neutral iodine oxides which have been reported in the literature. There is a lack of experimental thermodynamic and spectroscopic information for all iodine oxide species, except IO(g) and OIO(g). The recommended thermochemical tables are based on estimates for the Structure, vibrational frequencies, and enthalpy of formation based in part on the spectroscopic and thermodynamic data for the other halogen oxides [J. Phys. Chem. Ref. data 25, 551 (1996);25, 1061 (1996)]. Although there is a definite lack of information in comparison with the other halides, this information is provided for the iodine oxides for the following reasons: (1) to complete the study of the halogen oxide family and (2) to stress the need for additional experimental measurements. Of all the species mentioned in the literature, many have not been isolated or characterized. In fact, some do not exist. Throughout this paper, uncertainties attached to recommended values correspond to the uncertainty interval, equal to twice the standard deviation of the mean. (C) 1996 American Institute of Physics and American Chemical Society.
The thermodynamic and spectroscopic properties of the bromine oxide species have been reviewed. Recommended NIST-JANAF Thermochemical Tables are given for six gaseous bromine oxides: BrO, BBrO, BrOO, BrOBr, BrBrO, and...
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The thermodynamic and spectroscopic properties of the bromine oxide species have been reviewed. Recommended NIST-JANAF Thermochemical Tables are given for six gaseous bromine oxides: BrO, BBrO, BrOO, BrOBr, BrBrO, and BrO3. Sufficient information is not available to generate thermochemical tables for any condensed phase species. Annotated bibliographies (over 280 references) are provided for all neutral bromine oxides which have been reported in the literature. There are needs for additional experimental and theoretical data to reduce the uncertainties in the recommended values for these six species. Of all the species mentioned in the literature, many have not been isolated and characterized. In fact some do not exist. Throughout this paper, uncertainties attached to recommended values correspond to the uncertainty interval, equal to twice the standard deviation of the mean. (C) 1996 American Institute of Physics and American Chemical Society.
The thermodynamic and spectroscopic properties of the oxygen fluoride species have been reviewed. Recommended thermochemical tables are given for five gaseous oxygen fluorides: OF, OFO, FOO, FOF, and O2F2. Sufficient ...
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The thermodynamic and spectroscopic properties of the oxygen fluoride species have been reviewed. Recommended thermochemical tables are given for five gaseous oxygen fluorides: OF, OFO, FOO, FOF, and O2F2. Sufficient information is not available to generate thermochemical tables for any condensed phase species. Annotated bibliographies (over 600 references) are provided for all neutral oxygen fluorides which have been reported in the literature, There are needs for additional experimental and theoretical data to reduce the uncertainties in the recommended values for these five species. Of all the species mentioned in the literature, many have not been isolated and characterized. In fact, some do not exist. Throughout this paper, uncertainties attached to recommended values correspond to the uncertainty interval, equal to twice the standard deviation of the mean. (C) 1996 American Institute of Physics and American Chemical Society.
The National Institute of standards and Technology (NIST) is a government agency within the Department of Commerce. The standardreferencedata (SRD) program is part of NIST's Technology Services. This program pro...
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The National Institute of standards and Technology (NIST) is a government agency within the Department of Commerce. The standardreferencedata (SRD) program is part of NIST's Technology Services. This program provides well-documented numeric data to scientists and engineers for their research and development work. The data are species-oriented and tabular in concept, and the tables may be preexisting or generated from equations at runtime. In 1968, a Congressional mandate gave SRD copyright authority and a requirement of cost recovery for delivery of the data. This mandate adds a level of complexity to SRD's provision of data on the Internet. This article addresses initial experiments in delivering information on the Internet. The cost recovery aspects are not addressed at this time.
The National Institute of standards and Technology (NIST) is a government agency within the Department of Commerce. The standardreferencedata (SRD) program is part of NIST's Technology Services. This program pro...
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This review describes thermodynamic properties of condensed phases of the alkali metals, excluding francium for which the amount of information is too limited. The properties considered are: heat capacities from 0 to ...
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This review describes thermodynamic properties of condensed phases of the alkali metals, excluding francium for which the amount of information is too limited. The properties considered are: heat capacities from 0 to 1600 K, temperatures and enthalpies of fusion and martensitic transformation in Li and Na;discussion of the Debye temperature and electronic heat capacity coefficient at absolute zero temperature is also included. The paper is the second part of a series. Similar to our previous assessment of the IIA group [93ALC/CHA], this paper considers original studies, especially with respect to factors which influence the accuracy and reliability of results. Recommendations derived from such analyses are compared with most advanced previous reviews made at the Institute for High Temperatures (Moscow) [70SHP/YAK], [82GUR] and the National Institute of standards and Technology (Washington) [85JAN]. The properties of individual elements of the group are compared and suggestions are made for experimental studies which should improve poorly measured quantities. The review is supplemented by an IBM PC database which contains references, assessed data, brief description of studies and has facilities for fitting and plotting of data and for adding new information.
The thermodynamic properties of the alkaline earth metals in the condensed state have been critically reassessed, and recommended values for all of the relevant thermodynamic properties are given. These values are com...
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The thermodynamic properties of the alkaline earth metals in the condensed state have been critically reassessed, and recommended values for all of the relevant thermodynamic properties are given. These values are compared with those published in recent reviews by the staff at the Institute for High Temperatures (Moscow) and the National Bureau of standards (Washington, DC), and the reasons for any differences are discussed in detail. A direct result of this review is a set of recommendations for experimental studies which should enhance the reliability of the thermodynamic results. The properties considered are: temperatures and enthalpies of phase transformations and fusion, heat capacities from 0 K to 2000 K, the Debye temperatures, and electronic heat capacity coefficients at absolute zero temperature.
An information model of materials and their properties has been developed to support an international standard on product model data. Under the auspices of ISO, the standard for the Exchange of Product Model data (STE...
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