[Pw_forum] bulk modulus unit

Michael Mehl rcjhawk at gmail.com
Sat Apr 11 17:32:13 CEST 2009

"units" [ http://en.wikipedia.org/wiki/Units_(Unix) ] is your friend

  $ units
2445 units, 71 prefixes, 33 nonlinear units

You have: 1 rydberg/bohrradius^3
You want: gigapascal
	* 14710.505
	/ 6.7978632e-05

With the Ubuntu version, at least, using "au" instead of "bohrradius" 
produces interesting results.  It helps to read the documentation.

Mansoureh Pashangpour wrote:
> Dear all
> I"m calculating bulk modulus for a system with PWscf. As you know Etot 
> unit is Ry and V unit is a,u.^3.
> how can I find (K0 and K'0) bulk modulus in Gpa unit.
> Thanks
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					Michael J. Mehl
					Naval Research Laboratory
					Washington DC
					Currently at Duke University
(This is not my work email)

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