data_9006825
_chemical_name 'Paragonite'
loop_
_publ_author_name
'Comodi P'
'Zanazzi P F'
_journal_name_full "Physics and Chemistry of Minerals"
_journal_volume 27
_journal_year 2000
_journal_page_first 377
_journal_page_last 385
_publ_section_title
;
 Structural thermal behavior of paragonite and its dehydroxylate:
 a high-temperature single-crystal study
 Sample 2: T = 25 C
;
_chemical_formula_sum '(Na.91 K.07 Ca.01 Ba.01) Al3.07 Ti.005 Fe.01 Mn.001 Mg.02
_cell_length_a 5.140
_cell_length_b 8.911
_cell_length_c 19.380
_cell_angle_alpha 90
_cell_angle_beta 94.62
_cell_angle_gamma 90
_cell_volume 884.769
_symmetry_space_group_name_H-M 'C 1 2/c 1'
loop_
_symmetry_equiv_pos_as_xyz
  'x,y,z'
  '1/2+x,1/2+y,z'
  'x,-y,1/2+z'
  '1/2+x,1/2-y,1/2+z'
  '-x,y,1/2-z'
  '1/2-x,1/2+y,1/2-z'
  '-x,-y,-z'
  '1/2-x,1/2-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_Uiso_or_equiv
Na   0.00000   0.09400   0.25000   0.91000   0.03290
K   0.00000   0.09400   0.25000   0.07000   0.03290
Ca   0.00000   0.09400   0.25000   0.01000   0.03290
Ba   0.00000   0.09400   0.25000   0.01000   0.03290
AlM2   0.25008   0.08351   0.00005   0.99500   0.01030
TiM2   0.25008   0.08351   0.00005   0.00250   0.01030
FeM2   0.25008   0.08351   0.00005   0.00500   0.01030
MnM2   0.25008   0.08351   0.00005   0.00050   0.01030
MgM2   0.25008   0.08351   0.00005   0.01000   0.01030
AlT1   0.95490   0.42825   0.14063   0.27000   0.01210
SiT1   0.95490   0.42825   0.14063   0.73000   0.01210
AlT2   0.44170   0.25732   0.14063   0.27000   0.01180
SiT2   0.44170   0.25732   0.14063   0.73000   0.01180
O1   0.95740   0.44370   0.05545   1.00000   0.01240
O2   0.38090   0.25110   0.05551   1.00000   0.01220
O3   0.37660   0.09160   0.17401   1.00000   0.01670
O4   0.75110   0.29630   0.16264   1.00000   0.01800
O5   0.25020   0.38160   0.17464   1.00000   0.01700
O-h   0.95180   0.06260   0.05146   1.00000   0.01350
H   0.88600   0.13500   0.06300   1.00000   0.06000