Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Confirmation of the monoclinic Cc space group for the ground state phase
  of Pb(Zr0.525Ti0.475)O3 (PZT525): A Combined Synchrotron X-Ray and Neutron
  Powder Diffraction Study   The low temperature antiferrodistortive phase transition in a
pseudo-tetragonal composition of PZT with x=0.525 is investigated through a
combined synchrotron x-ray and neutron powder diffraction study. It is shown
that the superlattice peaks cannot be correctly accounted for in the Rietveld
refinement using R3c or R3c+Cm structural models, whereas the Cc space group
gives excellent fits to the superlattice peaks as well as to the perovskite
peaks. This settles at rest the existing controversies about the structure of
the ground state phase of PZT in the MPB region.

8
The categories of this paper are: hep-ex
11
The categories of this paper are: hep-lat
33
The categories of this paper are: plasm-ph
30
The categories of this paper are: q-alg
13
The categories of this paper are: quant-ph
23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
9
The categories of this paper are: nlin
14
The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th
5
The categories of this paper are: gr-qc
32
The categories of this paper are: atom-ph
7
The categories of this paper are: hep-th
31
The categories of this paper are: ao-sci
1
The categories of this paper are: cs
20
The categories of this paper are: acc-phys