data_global
_chemical_name_mineral 'Almarudite'
loop_
_publ_author_name
'Mihajlovic T'
'Lengauer C L'
'Ntaflos T'
'Lolitsch U'
'Tillmanns E'
_journal_name_full 'Neues Jahrbuch fur Mineralogie, Abhandlungen'
_journal_volume 179 
_journal_year 2004
_journal_page_first 265
_journal_page_last 294
_publ_section_title
;
 Two new minerals, rondorfite, Ca8Mg[SiO4]4Cl2, and almarudite,
 K(box,Na)2(Mn,Fe,Mg)2(Be,Al)3[Si12O30], and a study of iron-rich wadalite,
 Ca12[(Al8Si4Fe2)O32]C16, from the Bellerberg (Bellberg) volcano, Eifel, Germany
 Eastern Eifel volcanic area, Eifel, Germany
;
_database_code_amcsd 0014724
_chemical_compound_source 'Bellerberg volcano lava field, 2 km N of Mayen,'
_chemical_formula_sum 'K.928 Na.2 (Mn1.058 Fe.62 Mg.322) (Be2.214 Al.786) Si12 O30'
_cell_length_a 9.997
_cell_length_b 9.997
_cell_length_c 14.090
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 1219.498
_exptl_crystal_density_diffrn      2.722
_symmetry_space_group_name_H-M 'P 6/m c c'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '-x,-x+y,1/2+z'
  'x,x-y,1/2-z'
  '-x+y,-x,-z'
  'x-y,x,z'
  '-y,-x,1/2+z'
  'y,x,1/2-z'
  'y,-x+y,-z'
  '-y,x-y,z'
  'x-y,-y,1/2+z'
  '-x+y,y,1/2-z'
  'x,y,-z'
  '-x,-y,z'
  'x,x-y,1/2+z'
  '-x,-x+y,1/2-z'
  'x-y,x,-z'
  '-x+y,-x,z'
  'y,x,1/2+z'
  '-y,-x,1/2-z'
  '-y,x-y,-z'
  'y,-x+y,z'
  '-x+y,y,1/2+z'
  'x-y,-y,1/2-z'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_U_iso_or_equiv
KA   0.00000   0.00000   0.25000   0.92800   0.02510
NaB   0.33333   0.66667   0.02500   0.05000   0.00900
MnM   0.33333   0.66667   0.25000   0.52900   0.01060
FeM   0.33333   0.66667   0.25000   0.31000   0.01060
MgM   0.33333   0.66667   0.25000   0.16100   0.01060
BeT2   0.50000   0.00000   0.25000   0.73800   0.01140
AlT2   0.50000   0.00000   0.25000   0.26200   0.01140
SiT1   0.09503   0.35169   0.10857   1.00000   0.00850
O1   0.11300   0.40890   0.00000   1.00000   0.02210
O2   0.20770   0.28270   0.12747   1.00000   0.02410
O3   0.12912   0.48752   0.18076   1.00000   0.01500
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
KA 0.02430 0.02430 0.02680 0.01220 0.00000 0.00000
NaB 0.00200 0.00200 0.02000 0.00100 0.00000 0.00000
MnM 0.01090 0.01090 0.00990 0.00550 0.00000 0.00000
FeM 0.01090 0.01090 0.00990 0.00550 0.00000 0.00000
MgM 0.01090 0.01090 0.00990 0.00550 0.00000 0.00000
BeT2 0.01300 0.01040 0.00990 0.00650 0.00000 0.00000
AlT2 0.01300 0.01040 0.00990 0.00650 0.00000 0.00000
SiT1 0.00900 0.01040 0.00660 0.00521 -0.00035 -0.00154
O1 0.03730 0.02060 0.00740 0.01380 0.00000 0.00000
O2 0.02730 0.03730 0.02160 0.02650 -0.00360 -0.00640
O3 0.02360 0.01560 0.01050 0.01320 -0.00280 -0.00400