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From: Michael Schroeder (MSCREP_at_hidden_email_address.net)
Date: 11/16/1997



In a message dated 97-11-14 18:36:20 EST, you write:

<< What are the likely crystal forms of CO2? Have any calculations of halo
phenomena been made for atmospheres of such clouds (or other crystals than those of water ice for that mattter)? >>

I have a program which simulates ice crystal halos (It produces output similar to the figures in Greenler's 'Rainbows, Halos and Glories') which should be readily adaptable for this purpose. If anyone knows the crytal shape and index of refraction of Solid CO2 I'd be willing to produce images
of the halo shapes.