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K2Ta6Cu(AsO8)3

Alexandria ALEX

Alex-ID: agm010959271 · Space group: C2 (#5)

Basic Information

Formula
K2Ta6Cu(AsO8)3
Alex-ID
agm010959271
Elements
5
Sites
36
Space group
C2 (#5)
Crystal system
monoclinic
Volume
571.15
ų
Cell a
8.6479
Å
Cell b
8.6479
Å
Cell c
8.5581
Å
α angle
75.50
°
β angle
104.50
°
γ angle
77.06
°

Composition

Element Composition (atomic fraction)
Composition Info
Formula
K2Ta6Cu(AsO8)3
K
2.00 · 5.6%
Ta
6.00 · 16.7%
Cu
1.00 · 2.8%
As
3.00 · 8.3%
O
24.00 · 66.7%

Energy & Stability

Energy above hull
0.0203
eV/atom
Formation energy
-2.6909
eV/atom
Corrected total energy
-307.2997
eV
Raw total energy
-290.4448
eV

Electronic Structure

Indirect band gap
1.5856
eV
Direct band gap
1.6011
eV
DOS at Fermi level
-0.0001
Total magnetisation
0.0824
μB

Additional Information

Prototype ID

AB2C3D6E24_2_spg5

Decomposition

TaAsO5 KTa4AsO13 K2CuAs2O7 CuO As2O3

Computed at

2025-03-17 18:30:00

Citation

Alexandria website
https://alexandria.icams.rub.de/
Attribution

The crystal structure and related material properties of this entry were obtained from the Alexandria database (Alex-ID: agm010959271).

Reference

Th. Cavignac, J. Schmidt, P.-P. De Breuck, A. Loew, T. F. T. Cerqueira, H.-C. Wang, A. Bochkarev, Y. Lysogorskiy, A. H. Romero, R. Drautz, S. Botti and M. A. L. Marques. AI-Driven expansion and application of the Alexandria database. J. Phys. Mater. 9, 025014 (2026). https://doi.org/10.1088/2515-7639/ae6620

BibTeX
@article{Cavignac2026Alexandria,
  author  = {Cavignac, Th{\'e}o and Schmidt, Jonathan and De Breuck, Pierre-Paul and Loew, Antoine
             and Cerqueira, Tiago F. T. and Wang, Hai-Chen and Bochkarev, Anton
             and Lysogorskiy, Yury and Romero, Aldo H. and Drautz, Ralf and Botti, Silvana
             and Marques, Miguel A. L.},
  title   = {{AI}-Driven expansion and application of the {A}lexandria database},
  journal = {Journal of Physics: Materials},
  year    = {2026},
  volume  = {9},
  number  = {2},
  pages   = {025014},
  doi     = {10.1088/2515-7639/ae6620},
  url     = {https://doi.org/10.1088/2515-7639/ae6620}
}

3D Crystal Structure Rendering

Loading 3D structure…

Style: Ball & Stick
Raw CIF Data
# CIF generated by HEAS from Alexandria entry agm010959271
data_agm010959271
_cell_length_a     8.64787
_cell_length_b     8.64787
_cell_length_c     8.55805
_cell_angle_alpha  75.50091
_cell_angle_beta   104.49909
_cell_angle_gamma  77.05500
_cell_volume       571.14962
_symmetry_space_group_name_H-M 'P 1'
_symmetry_Int_Tables_number 1
loop_
_symmetry_equiv_pos_as_xyz
  'x, y, z'
loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
  K1 K 0.90839 0.41509 0.78784 1.00000
  K2 K 0.41509 0.90839 0.21216 1.00000
  Ta1 Ta 0.84793 0.03209 0.15176 1.00000
  Ta2 Ta 0.65702 0.15137 0.46674 1.00000
  Ta3 Ta 0.15137 0.65702 0.53326 1.00000
  Ta4 Ta 0.97079 0.34757 0.34834 1.00000
  Ta5 Ta 0.03209 0.84793 0.84824 1.00000
  Ta6 Ta 0.34757 0.97079 0.65166 1.00000
  Cu1 Cu 0.42534 0.42534 0.00000 1.00000
  As1 As 0.50787 0.27305 0.77055 1.00000
  As2 As 0.27305 0.50787 0.22945 1.00000
  As3 As 0.72377 0.72377 0.00000 1.00000
  O1 O 0.49382 0.03866 0.51953 1.00000
  O2 O 0.83774 0.99471 0.65411 1.00000
  O3 O 0.41882 0.11646 0.80303 1.00000
  O4 O 0.16400 0.16400 0.50000 1.00000
  O5 O 0.68863 0.07181 0.28679 1.00000
  O6 O 0.58137 0.30699 0.60175 1.00000
  O7 O 0.67742 0.23684 0.94591 1.00000
  O8 O 0.36514 0.45761 0.75865 1.00000
  O9 O 0.94389 0.19467 0.20463 1.00000
  O10 O 0.11646 0.41882 0.19697 1.00000
  O11 O 0.45761 0.36514 0.24135 1.00000
  O12 O 0.80803 0.29567 0.44493 1.00000
  O13 O 0.03866 0.49382 0.48047 1.00000
  O14 O 0.07181 0.68863 0.71321 1.00000
  O15 O 0.23684 0.67742 0.05409 1.00000
  O16 O 0.30699 0.58137 0.39825 1.00000
  O17 O 0.29567 0.80803 0.55507 1.00000
  O18 O 0.76677 0.53742 0.15645 1.00000
  O19 O 0.53742 0.76677 0.84355 1.00000
  O20 O 0.87998 0.70018 0.90953 1.00000
  O21 O 0.19467 0.94389 0.79537 1.00000
  O22 O 0.70018 0.87998 0.09047 1.00000
  O23 O 0.99471 0.83774 0.34589 1.00000
  O24 O 0.96942 0.96942 0.00000 1.00000
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