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At last, ammunition to convince my boss to buy a more up to date version of international tables. He is convinced that the 1969 version still tells us everything we need to know - seems section 9 was written sometime within the last 37 years!

Thanks for the help.

Simon

Ian Tickle wrote:


Hi Simon

It's in Vol. A, Table 9.3.4.1 'Conventional cells' (p. 758).

i.e. a < b < c for oP, oI & oF (oC is a special case, see Table).

The order is independent of handedness.  If necessary the direction of
one axis is reversed to make the cell right-handed.

-- Ian

-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Simon Kolstoe
Sent: Tuesday, September 12, 2006 2:38 PM
To: [email protected]
Subject: [ccp4bb]: Index conventions

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Dear ccp4bb,

Could anyone tell me where I can find the index conventions regarding how one specifies unit cell lengths (ie in Orthorhombic, after taking into consideration handedness, do I put the lengths in increasing or decreasing order)? I've been vaguely flicking through international tables for the last couple days without much joy.

Simon





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