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Lawrencite Group

A material that is NOT an approved mineral species

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Photos of Lawrencite Group (10)

Lawrencite Group Gallery Search Photos of Lawrencite Group

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Lawrencite

Nandan meteorite, Lihu - Yaochai area, Nandan County, Hechi, Guangxi, China

Lawrencite

Nandan meteorite, Lihu - Yaochai area, Nandan County, Hechi, Guangxi, China

Lawrencite

Nandan meteorite, Lihu - Yaochai area, Nandan County, Hechi, Guangxi, China

Lawrencite

Nandan meteorite, Lihu - Yaochai area, Nandan County, Hechi, Guangxi, China

Lawrencite

Nandan meteorite, Lihu - Yaochai area, Nandan County, Hechi, Guangxi, China

Lawrencite

Nandan meteorite, Lihu - Yaochai area, Nandan County, Hechi, Guangxi, China

Lawrencite

Nandan meteorite, Lihu - Yaochai area, Nandan County, Hechi, Guangxi, China

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About Lawrencite GroupHide

Formula:

AX₂ where A = Fe, Mn, Mg, Cu and X = Cl

This page provides mineralogical data about Lawrencite Group.

Unique IdentifiersHide

Mindat ID:

32112

Long-form identifier:

mindat:1:1:32112:1

GUID
(UUID V4):

ed664b79-7674-4f9d-ab5c-b5a1c0d19e3d

Chemistry of Lawrencite GroupHide

Mindat Formula:

AX₂ where A = Fe, Mn, Mg, Cu and X = Cl

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	Pressure (GPa)	Temp (K)
0011808	Chloromagnesite	Wyckoff R W G (1963) Second edition. Interscience Publishers, New York, New York Crystal Structures 1 239-444	1963		0	293
0011807	Lawrencite	Wyckoff R W G (1963) Second edition. Interscience Publishers, New York, New York Crystal Structures 1 239-444	1963		0	293
0018471	Lawrencite	Herpin A, Meriel P (1957) Etude par diffraction de neutrons a 4.2 K de la structure antiferromagnetique de Cl2Fe Comptes Rendus Hebdomadaires des Seances de l'Academie des Sciences 245 650-653	1957	synthetic	0	4.2
0018598	Lawrencite	Vettier C, Yelon W B (1975) The structure of FeCl2 at high pressures Journal of Physics and Chemistry of Solids 36 401-405	1975		0.104	293
0018599	Lawrencite	Vettier C, Yelon W B (1975) The structure of FeCl2 at high pressures Journal of Physics and Chemistry of Solids 36 401-405	1975		0.315	293
0018600	Lawrencite	Vettier C, Yelon W B (1975) The structure of FeCl2 at high pressures Journal of Physics and Chemistry of Solids 36 401-405	1975		0.57	293
0018601	Lawrencite	Vettier C, Yelon W B (1975) The structure of FeCl2 at high pressures Journal of Physics and Chemistry of Solids 36 401-405	1975		0.597	293
0018602	Lawrencite	Vettier C, Yelon W B (1975) The structure of FeCl2 at high pressures Journal of Physics and Chemistry of Solids 36 401-405	1975		0.64	293
0018640	Lawrencite	Wilkinson M K, Cable J W, Wollan E O, Koehler W C (1959) Neutron diffraction investigations of the magnetic ordering in FeBr2, CoBr2, FeCl2, and CoCl2 Physical Review 113 497-507	1959	synthetic	0	293
0011809	Scacchite	Wyckoff R W G (1963) Second edition. Interscience Publishers, New York, New York Crystal Structures 1 239-444	1963		0	293
0001544	Tolbachite	Burns P C, Hawthorne F C (1993) Tolbachite, CuCl2, the first example of Cu2+ octahedrally coordinated by Cl American Mineralogist 78 187-189	1993		0	293

CIF Raw Data - click here to close

data_global
_chemical_name_mineral 'Chloromagnesite'
loop_
_publ_author_name
'Wyckoff R W G'
_journal_name_full 'Crystal Structures'
_journal_volume 1 
_journal_year 1963
_journal_page_first 239
_journal_page_last 444
_publ_section_title
;
 Second edition. Interscience Publishers, New York, New York
 Note: cadmium chloride structure
;
_database_code_amcsd 0011808
_chemical_formula_sum 'Mg Cl2'
_cell_length_a 3.596
_cell_length_b 3.596
_cell_length_c 17.589
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 196.975
_exptl_crystal_density_diffrn      2.408
_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
Mg   0.00000   0.00000   0.00000
Cl   0.00000   0.00000   0.25000

Relationship of Lawrencite Group to other SpeciesHide

Group Members:

Chloromagnesite	MgCl₂	Trig. 3m (3 2/m) : R3m
Lawrencite	(Fe²⁺,Ni)Cl₂	Trig. 3m (3 2/m) : R3m
Scacchite	MnCl₂	Trig. 3m (3 2/m) : R3m
Tolbachite	CuCl₂	Mon. 2/m : B2/m

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 Lawrencite GroupHide

mindat.org URL:

https://www.mindat.org/min-32112.html
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References for Lawrencite GroupHide

Reference List:

Palache, Charles, Berman, Harry, Frondel, Clifford (1951) The System of Mineralogy (7th ed.) Vol. 2 - Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Ect. John Wiley and Sons, New York.

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