Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: MALDI-TOF and Quantum Chemical Study of Non-stoichiometric Tantalum
  Oxychloride Clusters   Using the MALDI-TOF spectroscopy method, clusters of non-stoichiometric
tantalum oxychlorides formed as a result of hydrolysis of nanoscale reaction
products of tantalum pentachloride with acetylene and of interaction with
oxygen and air moisture in the process of sample preparation were studied. The
formation of oxychloride clusters containing from 2 to 15 tantalum atoms is
shown. Quantum chemical calculations of the structure and relative
thermodynamic stability of the possible isomers are carried out. The stability
of cage Ta structures connected by oxygen bridges with significant contribution
of metal-metal bond is established

34
The categories of this paper are: chem-ph
29
The categories of this paper are: funct-an
9
The categories of this paper are: nlin
1
The categories of this paper are: cs
6
The categories of this paper are: astro-ph
13
The categories of this paper are: quant-ph
21
The categories of this paper are: adap-org
26
The categories of this paper are: bayes-an
22
The categories of this paper are: chao-dyn
17
The categories of this paper are: q-fin
0
The categories of this paper are: hep-ph
32
The categories of this paper are: atom-ph
2
The categories of this paper are: math
27
The categories of this paper are: comp-gas
24
The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci