POV-Ray : Newsgroups : povray.binaries.images : Granite_21 - the final macro : Re: Granite_21 - the final macro Server Time
26 Sep 2022 03:15:24 EDT (-0400)
  Re: Granite_21 - the final macro  
From: Bald Eagle
Date: 21 Sep 2021 15:45:00
Message: <web.614a357db21f010c1f9dae3025979125@news.povray.org>
"Samuel B." <stb### [at] hotmailcom> wrote:
All my attempts have failed. There is probably a basic solution
> > > and I'm just over-complicating things...

Doesn't seem that way.  Having never done any of this type of work, in my
ignorance, I believe I was initially suggesting an overly simplistic approach.

OK, here's the deal.

from: https://en.wikipedia.org/wiki/Miller_index
.... a family of lattice planes is determined by three integers h, k, and
ℓ, the Miller indices. They are written (hkℓ), and denote the family
of planes orthogonal to hb1 + kb2 +lb3, where bi are the basis of the reciprocal
lattice vectors....

from which I can see that the key part is incorporated by reference at

The reciprocal lattice is the set of all vectors Gm, that are wavevectors of
plane waves in the Fourier series of a spatial function which periodicity is the
same as that of a direct lattice Rn


The guy you want to talk to is Michael Joseph Waters - a postdoctoral researcher
in X-ray crystallography at Northwestern.  Nice guy - we emailed back and forth
a while back.
"NiO is a odd material, it's antiferromagnetic so there are alternating planes
of spin up and spin down electrons. If you learn Miller indices, these are on
(111) planes."

Find his contact info here:

He's likely a busy guy, but he may have some advice on how to approach
unraveling this all.  I'm guessing it might take a 3rd party software package -
or maybe not, if we can use the FFT that I coded up a while back.

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