<!--

       Copyright 2011 Peter Murray-Rust et. al.

       Licensed under the Apache License, Version 2.0 (the "License");
       you may not use this file except in compliance with the License.
       You may obtain a copy of the License at

           http://www.apache.org/licenses/LICENSE-2.0

       Unless required by applicable law or agreed to in writing, software
       distributed under the License is distributed on an "AS IS" BASIS,
       WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
       See the License for the specific language governing permissions and
       limitations under the License.

-->

 <unitList
      id="castepUnits"
      namespace="http://www.xml-cml.org/units/castepUnits"
      title="CASTEP units dictionary"
      siNamespace="http://www.xml-cml.org/units/siUnits"
      xmlns="http://www.xml-cml.org/schema"
      xsi:schemaLocation="http://www.xml-cml.org/schema ../../schema23/schema.xsd"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xmlns:h="http://www.w3.org/1999/xhtml"
      xmlns:dc="http://www.xml-cml.org/dict/dcDict"
      xmlns:siUnits="http://www.xml-cml.org/units/siUnits"
      xmlns:unitType="http://www.xml-cml.org/units/unitTypes"
    >
    
<!-- length -->
 
<!-- mass -->

<!-- time -->

	
<!-- charge -->
 
<!-- energy -->

    <unit
    title="Hertz (energy)"
    id="hertz_energy"
    symbol="Hz"
    parentSI="siUnits:joule"
    multiplierToSI="6.626068E-34"
    unitType="unitType:energy">
	<metadata name="dc:source" content="Wikipedia" />
	<metadata name="dc:creator" content="Andrew Walkingshaw" />
	<definition>
	The energy of a photon of frequency f.
    </definition>
    <description>
    The energy of a photon is defined as hf, where h is Planck's constant; therefore, we can use frequency
    as a measure of energy.
    </description>
    </unit> 
    
    <unit
    title="Kelvin (energy)"
    id="kelvin_energy"
    symbol="K"
    parentSI="siUnits:joule"
    multiplierToSI="1.3806503E-23"
    unitType="unitType:energy">
	<metadata name="dc:source" content="Wikipedia" />
	<metadata name="dc:creator" content="Andrew Walkingshaw" />
    <definition>
	One Kelvin of energy, in this context, is defined as 1K*k_B, the Boltzmann constant.
    </definition>
    <description>
	The Kelvin is a reasonably commonly encountered unit for energy, but the definition can be somewhat
	ambiguous. Here, the energy referred to is simply defined as the product of the magnitude and the 
	Boltzmann constant, which gives the correct dimensionality. Note that this is unrelated to the
	number of particles in the system (i.e., the resulting energy is not per-particle or per-mole);
	thus, a mole of particles with a per-particle energy of 1K/particle (in this terminology) would
	have an energy of 8.314 Jmol-1K-1 (the molar gas constant).
    </description>
    </unit>     

<!-- force -->



<!-- velocity -->


<!-- pressure / stress -->


<!-- reciprocal length -->

<!-- force/length -->

<!-- volume -->

</unitList>