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Wermlandite Group

A group of related mineral species

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Photos of Wermlandite Group (195)

Wermlandite Group Gallery Search Photos of Wermlandite Group

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Nikischerite

Huanuni mine, Huanuni, Pantaleón Dalence Province, Oruro, Bolivia

Shigaite, etc.

N'Chwaning I Mine, N'Chwaning Mines, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa

Shigaite

N'Chwaning I Mine, N'Chwaning Mines, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa

Nikischerite

Huanuni mine, Huanuni, Pantaleón Dalence Province, Oruro, Bolivia

Shigaite, etc.

N'Chwaning I Mine, N'Chwaning Mines, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa

Shigaite

N'Chwaning I Mine, N'Chwaning Mines, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa

Nikischerite

Huanuni mine, Huanuni, Pantaleón Dalence Province, Oruro, Bolivia

Shigaite, etc.

N'Chwaning I Mine, N'Chwaning Mines, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa

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About Wermlandite GroupHide

Formula:

M₇R³⁺₂(OH)₁₈[Ca(H₂O)₆][SO₄]₂ · 6H₂O, where = Mg, Fe, Zn and R= Al or Fe

Member of:

Hydrotalcite Supergroup

This page provides mineralogical data about Wermlandite Group.

Unique IdentifiersHide

Mindat ID:

43295

Long-form identifier:

mindat:1:1:43295:9

GUID
(UUID V4):

3e57b888-766b-41b3-8248-ea5a2aeddbc3

Chemistry of Wermlandite GroupHide

Mindat Formula:

M₇R³⁺₂(OH)₁₈[Ca(H₂O)₆][SO₄]₂ · 6H₂O, where = Mg, Fe, Zn and R= Al or Fe

Crystal StructureHide

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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure

ID	Species	Reference	Year	Locality	Temp (K)
0014801	Motukoreaite	Rius J, Plana F (1986) Contribution to the superstructure resolution of the double layer mineral motukoreaite Neues Jahrbuch fur Mineralogie, Monatshefte 1986 263-272	1986	the Emile Baudot bank, western Mediterranean	293
0005480	Shigaite	Cooper M A, Hawthorne F C (1996) The crystal structure of shigaite, [AlMn2(OH)6]3(SO4)2Na(H2O)6{H2O}6, a hydrotalcite-group mineral The Canadian Mineralogist 34 91-97	1996		293
0010871	Wermlandite	Rius J, Allmann R (1984) The superstructure of the double layer mineral wermlandite [Mg7(Al0.57,Fe3+0.43)2(OH)18]2+[(Ca0.6,Mg0.4)(SO4)2(H2O)12]2- Zeitschrift fur Kristallographie 168 133-144	1984	Langban, Warmland, Sweden	293
0005826	Nikischerite	Huminicki D M C, Hawthorne F C (2003) The crystal structure of nikischerite, NaFeAl3(SO4)2(OH)18(H2O)12, a mineral of the shigaite group The Canadian Mineralogist 41 79-82	2003		293

CIF Raw Data - click here to close

data_global
_chemical_name_mineral 'Motukoreaite'
loop_
_publ_author_name
'Rius J'
'Plana F'
_journal_name_full 'Neues Jahrbuch fur Mineralogie, Monatshefte'
_journal_volume 1986 
_journal_year 1986
_journal_page_first 263
_journal_page_last 272
_publ_section_title
;
 Contribution to the superstructure resolution of the double layer
 mineral motukoreaite
;
_database_code_amcsd 0014801
_chemical_compound_source 'the Emile Baudot bank, western Mediterranean'
_chemical_formula_sum 'Al3 Mg6 Na.667 S1.333 O33.333 H30'
_cell_length_a 9.172
_cell_length_b 9.172
_cell_length_c 33.51
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 2441.367
_exptl_crystal_density_diffrn      1.731
_symmetry_space_group_name_H-M 'R -3 m'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '2/3+x,1/3+y,1/3+z'
  '1/3+x,2/3+y,2/3+z'
  'x,x-y,z'
  '2/3+x,1/3+x-y,1/3+z'
  '1/3+x,2/3+x-y,2/3+z'
  'y,x,-z'
  '2/3+y,1/3+x,1/3-z'
  '1/3+y,2/3+x,2/3-z'
  '-x+y,y,z'
  '2/3-x+y,1/3+y,1/3+z'
  '1/3-x+y,2/3+y,2/3+z'
  '-x,-x+y,-z'
  '2/3-x,1/3-x+y,1/3-z'
  '1/3-x,2/3-x+y,2/3-z'
  '-y,-x,z'
  '2/3-y,1/3-x,1/3+z'
  '1/3-y,2/3-x,2/3+z'
  'x-y,-y,-z'
  '2/3+x-y,1/3-y,1/3-z'
  '1/3+x-y,2/3-y,2/3-z'
  'y,-x+y,-z'
  '2/3+y,1/3-x+y,1/3-z'
  '1/3+y,2/3-x+y,2/3-z'
  '-x+y,-x,z'
  '2/3-x+y,1/3-x,1/3+z'
  '1/3-x+y,2/3-x,2/3+z'
  '-x,-y,-z'
  '2/3-x,1/3-y,1/3-z'
  '1/3-x,2/3-y,2/3-z'
  '-y,x-y,z'
  '2/3-y,1/3+x-y,1/3+z'
  '1/3-y,2/3+x-y,2/3+z'
  'x-y,x,-z'
  '2/3+x-y,1/3+x,1/3-z'
  '1/3+x-y,2/3+x,2/3-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
Al1   0.00000   0.00000   0.50000   1.00000   0.00760
Mg2   0.33440   0.00000   0.50000   1.00000   0.00990
Al3   0.33333   0.66667   0.50140   1.00000   0.01030
Na   0.00000   0.00000   0.00000   0.66667   0.02170
S   0.66667   0.33333   0.04020   0.66667   0.00670
O1   0.10610   0.21220   0.52890   1.00000   0.02630
O2   0.44080   0.88160   0.53050   1.00000   0.01960
O3   0.45780   0.22890   0.52920   1.00000   0.01360
O4   0.13270   0.43010   0.05530   0.33333   0.02590
O5   0.21620   0.16900   0.05200   0.50000   0.03730
O6   0.54950   0.39230   0.05630   0.33333   0.01520
O7   0.33333   0.66667   0.00420   0.66667   0.01190
H1   0.20000   0.10000   0.11000   1.00000 ?
H2   0.21000   0.41000   0.11000   1.00000 ?
H3   0.56000   0.13000   0.12000   1.00000 ?
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
Al1 0.00760 0.00760 0.03490 0.00380 0.00000 0.00000
Mg2 0.00990 0.00620 0.02570 0.00310 0.00005 0.00010
Al3 0.01030 0.01030 0.01350 0.00515 0.00000 0.00000

Relationship of Wermlandite Group to other SpeciesHide

Member of:

Hydrotalcite Supergroup

Other Members of this group:

Akopovaite	Al₄Li₂(OH)₁₂(CO₃)(H₂O)₃	Mon. 2/m : B2/m
Amoraite	Ca₁₂Al₆(OH)₃₆(CO₃)₂(SO₃) · 15H₂O	Tric. 1 : P1
Brugnatellite	Mg₆Fe³⁺(CO₃)(OH)₁₃ · 4H₂O	Hex.
Carbocalumite	Ca₄Al₂(OH)₁₂(CO₃) · 6H₂O	Trig. 3m (3 2/m) : R3c
Coalingite	Mg₁₀Fe³⁺₂(OH)₂₄[CO₃] · 2H₂O	Trig. 3m (3 2/m) : R3m
Cualstibite Group	M₂R(OH)₆[Sb⁵⁺(OH)₆], where M = Zn, Ni, Cu and R = Al or Fe³⁺
Dritsite	Li₂Al₄(OH)₁₂Cl₂ · 3H₂O	Hex. 6/mmm (6/m 2/m 2/m) : P6₃/mcm
Fougèrite Group
Glaucocerinite Group
Hydrocalumite Group
Hydrotalcite Group	M₆R³⁺₂(OH)₁₆Z · 4H₂O, where M=Mg, Fe, Ni, R³⁺ = Al, Cr, Co or Fe, and Z=CO₃, Cl
Karchevskyite	Mg₁₈Al₉(OH)₅₄Sr₂(CO₃)₉(H₂O)₆ (H₃O)₅	Trig.
Mampsisite	Ca₄Al₂(CO₃)(OH)₁₂ · 5H₂O	Tric.
Muskoxite	Mg₇Fe₄O₁₃ · 10H₂O	Trig. 3m (3 2/m)
Poellmannite	Ca₆Al₃(OH)₁₈[Na(H₂O)₆](SO₄)₂ · 6H₂O	Trig. 3 : R3
Quintinite Group
UM1987-05-OH:AlCMg	Mg₄Al₂(OH)₁₂(CO₃,SO₄) · 3H₂O
Woodwardite Group	May be considered a subgroup of the Hydrotalcite Group.

Group Members:

Erssonite	Mg₇Fe³⁺₂(OH)₁₈[Ca(H₂O)₆](SO₄)₂ · 12H₂O	Trig. 3m (3 2/m) : P3c1
Motukoreaite	Mg₆Al₃(OH)₁₈[Na(H₂O)₆][SO₄]₂ · 6H₂O	Trig. 3m (3 2/m) : R3m
Natroglaucocerinite	Zn₆Al₃(OH)₁₈[Na(H₂O)₆](SO₄)₂ · 6H₂O	Hex.
Nikischerite	Fe²⁺₆Al₃(OH)₁₈[Na(H₂O)₆](SO₄)₂ · 6H₂O	Trig. 3 : R3
Shigaite	Mn₆Al₃(OH)₁₈[Na(H₂O)₆](SO₄)₂ · 6H₂O	Trig. 3 : R3
Wermlandite	Mg₇Al₂(OH)₁₈[Ca(H₂O)₆][SO₄]₂ · 6H₂O	Trig. 3m (3 2/m) : P3c1

Other InformationHide

Health Risks:

No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for Wermlandite GroupHide

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https://www.mindat.org/min-43295.html
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References for Wermlandite GroupHide

Reference List:

Mills, S. J., Christy, A. G., Génin, J.-M. R., Kameda, T., Colombo, F. (2012) Nomenclature of the hydrotalcite supergroup: natural layered double hydroxides. Mineralogical Magazine, 76 (5) 1289-1336 doi:10.1180/minmag.2012.076.5.10

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