Metadata-Version: 1.0
Name: periodictable
Version: 1.3.4
Summary: Extensible periodic table of the elements
Home-page: http://www.reflectometry.org/danse/elements.html
Author: Paul Kienzle
Author-email: pkienzle@gmail.com
License: public domain
Description: =========================================
        Extensible periodic table of the elements
        =========================================
        
        This package provides a periodic table of the elements with
        support for mass, density and xray/neutron scattering information.
        
        Masses, densities and natural abundances come from the
        NIST Physics Laboratory, but do not represent a critical
        evaluation by NIST scientists.
        
        Neutron scattering calculations use values collected by the 
        Atomic Institute of the Austrian Universities.  These values
        do corresponding to those from other packages, though there 
        are some differences depending to the tables used.  Bound 
        coherent neutron scattering for gold in particular is significantly 
        different from older value: 7.63(6) as measured in 1974
        compared to 7.90(7) as measured in 1990.
        
        X-ray scattering calculations use a combination of empirical and
        theoretical values from the LBL Center for X-ray Optics.  These
        values differ from those given in other sources such as the
        International Tables for Crystallography, Volume C, and so may
        give different results from other packages.
        
        
        Change history
        ==============
        
        1.3.4 2013-02-26
        ----------------
        
        Modified:
        
        * formula.natural_density was being computed incorrectly
        
        1.3.3 2013-02-25
        ----------------
        
        * add data sets missing from last release
        
        1.3.2 2013-02-22
        ----------------
        
        New:
        
        * formulas now report charge and mass fraction
        * formula parser accepts ions as Yy{#+} or Yy[#]{#+} for isotopes
        * support neutron activation calculations
        
        Modified:
        
        * ions now display as Yy{#+} rather than Yy^{#+}
        
        1.3  2010-12-05
        ---------------
        
        New:
        
        * mix_by_weight and mix_by_volume formula constructors
        * use natural density to set density for isotope specific formulas
        * add neutron_scattering function which returns xs, sld and penetration depth
        
        Modified:
        
        * need wavelength= or energy= for xray/neutron sld
        * improved docs and testing
        
        1.2  2010-04-28
        ---------------
        
        New:
        
        * support pickle: id(H) == id(loads(dumps(H)))
        * support ions, with magnetic form factors and x-ray f0 scattering factor
        * support py2exe wrappers
        * allow density to be calculated from structure (bcc, fcc, hcp, cubic, diamond)
        * estimate molecular volume
        * support private tables with some values replaced by application
        
        Modified:
        
        * rename package periodictable
        * rename table to periodictable.elements
        * neutron sld returns real and imaginary coherent and incoherent
          instead of coherent, absorption and incoherent
        * bug fix: sld for H[2] was wrong when queried before sld for H.
        * remove CrysFML ionic radius definitions
        
        1.1  2009-01-20
        ---------------
        
        Modified:
        
        * Restructure package, separating tests into different directory
        * When defining table extensions, you should now do::
        
              from elements.core import periodic_table, Element, Isotope
        
          rather than::
        
              from elements import periodic_table
              from elements.elements import Element, Isotope
        
        
Platform: UNKNOWN
Classifier: Development Status :: 4 - Beta
Classifier: Environment :: Console
Classifier: Intended Audience :: Science/Research
Classifier: License :: Public Domain
Classifier: Operating System :: OS Independent
Classifier: Programming Language :: Python
Classifier: Topic :: Scientific/Engineering :: Chemistry
Classifier: Topic :: Scientific/Engineering :: Physics
