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Brittle Mica

A group of related mineral species

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Photos of Brittle Mica (252)

Brittle Mica Gallery Search Photos of Brittle Mica

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Kinoshitalite

Hokkejino, Kizugawa City, Kyoto Prefecture, Japan

Clintonite

Crestmore quarries, Crestmore, Jurupa Valley, Riverside County, California, USA

Margarite

Chester Emery Mines, Chester, Hampden County, Massachusetts, USA

Kinoshitalite

Hokkejino, Kizugawa City, Kyoto Prefecture, Japan

Clintonite

Crestmore quarries, Crestmore, Jurupa Valley, Riverside County, California, USA

Margarite

Chester Emery Mines, Chester, Hampden County, Massachusetts, USA

Kinoshitalite

Hokkejino, Kizugawa City, Kyoto Prefecture, Japan

Clintonite

Crestmore quarries, Crestmore, Jurupa Valley, Riverside County, California, USA

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About Brittle MicaHide

Member of:

Mica Group

Name:

Brittle Mica was a term coined by Frank Wigglesworth Clarke and Edward A. Schneider in 1888 to describe the physical properties shared by a sub-class of micas that contain divalent interlayer cations. The stronger chemical bonding of the divalent cations as well as the concomitant substitution of Al for Si changes the mechanical properties of the mica from elastic to brittle and hence the origin of the name.

Synonymous with the German term Sprödglimmer.

Unique IdentifiersHide

Mindat ID:

43757

Long-form identifier:

mindat:1:1:43757:4

GUID
(UUID V4):

f215833f-d03b-42e7-8d02-d9de40165334

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)
0001004	Anandite	Filut M A, Rule A C, Bailey S W (1985) Crystal structure refinement of anandite-2Or, a barium- and sulfur-bearing trioctahedral mica American Mineralogist 70 1298-1308	1985		293
0000888	Bityite	Lin J C, Guggenheim S (1983) The crystal structure of a Li,Be-rich brittle mica: a dioctahedral-trioctahedral intermediate American Mineralogist 68 130-142	1983	Mops pegmatite, Salisbury district, Zimbabwe	293
0020138	Bityite	Gatta G D, Nenert G, Guastella G, Lotti P, Guastoni A, Rizzato S (2014) A single-crystal neutron and X-ray diffraction study of a Li,Be-bearing brittle mica Mineralogical Magazine 78 55-72	2014	the Harding pegmatite, Picuris Range, New Mexico, USA	100
0020139	Bityite	Gatta G D, Nenert G, Guastella G, Lotti P, Guastoni A, Rizzato S (2014) A single-crystal neutron and X-ray diffraction study of a Li,Be-bearing brittle mica Mineralogical Magazine 78 55-72	2014	the Harding pegmatite, Picuris Range, New Mexico, USA	100
0020140	Bityite	Gatta G D, Nenert G, Guastella G, Lotti P, Guastoni A, Rizzato S (2014) A single-crystal neutron and X-ray diffraction study of a Li,Be-bearing brittle mica Mineralogical Magazine 78 55-72	2014	the Harding pegmatite, Picuris Range, New Mexico, USA	20
0020141	Bityite	Gatta G D, Nenert G, Guastella G, Lotti P, Guastoni A, Rizzato S (2014) A single-crystal neutron and X-ray diffraction study of a Li,Be-bearing brittle mica Mineralogical Magazine 78 55-72	2014	the Harding pegmatite, Picuris Range, New Mexico, USA	20
0001045	Clintonite	Joswig W, Amthauer G, Takeuchi Y (1986) Neutron-diffraction and Mossbauer spectroscopic study of clintonite (xanthophyllite) American Mineralogist 71 1194-1197	1986		293
0001141	Clintonite	MacKinney J A, Mora C I, Bailey S W (1988) Structure and crystal chemistry of clintonite Sample from Chichibu mine American Mineralogist 73 365-375	1988		293
0001142	Clintonite	MacKinney J A, Mora C I, Bailey S W (1988) Structure and crystal chemistry of clintonite Sample from Ertsberg, Irian Jaya American Mineralogist 73 365-375	1988		293
0001143	Clintonite	MacKinney J A, Mora C I, Bailey S W (1988) Structure and crystal chemistry of clintonite Sample from Edenvill, Orange Country, New York American Mineralogist 73 365-375	1988		293
0001943	Clintonite	Alietti E, Brigatti M F, Poppi L (1997) Clintonite-1M: Crystal chemistry and its relationships to closely associated Al-rich phlogopite American Mineralogist 82 936-945	1997		293
0001944	Clintonite	Alietti E, Brigatti M F, Poppi L (1997) Clintonite-1M: Crystal chemistry and its relationships to closely associated Al-rich phlogopite American Mineralogist 82 936-945	1997		293
0001945	Clintonite	Alietti E, Brigatti M F, Poppi L (1997) Clintonite-1M: Crystal chemistry and its relationships to closely associated Al-rich phlogopite American Mineralogist 82 936-945	1997		293
0001946	Clintonite	Alietti E, Brigatti M F, Poppi L (1997) Clintonite-1M: Crystal chemistry and its relationships to closely associated Al-rich phlogopite American Mineralogist 82 936-945	1997		293
0001947	Clintonite	Alietti E, Brigatti M F, Poppi L (1997) Clintonite-1M: Crystal chemistry and its relationships to closely associated Al-rich phlogopite American Mineralogist 82 936-945	1997		293
0001948	Clintonite	Alietti E, Brigatti M F, Poppi L (1997) Clintonite-1M: Crystal chemistry and its relationships to closely associated Al-rich phlogopite American Mineralogist 82 936-945	1997		293
0009236	Clintonite	Takeuchi Y, Sadanaga R (1959) The crystal structure of xanthophyllite Acta Crystallographica 12 945-946	1959	Chichibu mine, Japan	293
0002348	Kinoshitalite	Gnos E, Armbruster T (2000) Kinoshitalite, Ba(Mg)3(Al2Si2)O10(OH,F)2, a brittle mica from a manganese deposit in Oman: Paragenesis and crystal chemistry American Mineralogist 85 242-250	2000		293
0006502	Kinoshitalite	Brigatti M F, Poppi L (1993) Crystal chemistry of Ba-rich trioctahedral micas-1M European Journal of Mineralogy 5 857-871	1993		293
0006503	Kinoshitalite	Brigatti M F, Poppi L (1993) Crystal chemistry of Ba-rich trioctahedral micas-1M European Journal of Mineralogy 5 857-871	1993		293
0000477	Margarite	Guggenheim S, Bailey S W (1975) Refinement of the margarite structure in subgroup symmetry American Mineralogist 60 1023-1029	1975		293
0000615	Margarite	Guggenheim S, Bailey S W (1978) Refinement of the margarite structure in subgroup symmetry: correction, further refinement, and comments American Mineralogist 63 186-187	1978		293
0019603	Margarite	Joswig W, Takeuchi Y, Fuess H (1983) Neutron-diffraction study on the orientation of hydroxyl groups in margarite Zeitschrift fur Kristallographie 165 295-303	1983	Greiner, Zillertal, Autria	293
0005634	Ferrokinoshitalite	Guggenheim S, Frimmel H E (1999) Ferrokinoshitalite, a new species of brittle mica from the Broken Hill Mine, South Africa: Structural and mineralogical characterization The Canadian Mineralogist 37 1445-1452	1999	Broken Hill Mine, South Africa	293
0006061	Oxykinoshitalite	Kogarko L N, Uvarova Y A, Sokolova E, Hawthorne F C, Ottolini L, Grice J D (2005) Oxykinoshitalite, a new species of mica from Fernando-do-Noronha island, Brazil: Occurrence and crystal structure The Canadian Mineralogist 43 1501-1510	2005	Fernando-do-Noronha island, Brazil	293

CIF Raw Data - click here to close

data_global
_chemical_name_mineral 'Anandite'
loop_
_publ_author_name
'Filut M A'
'Rule A C'
'Bailey S W'
_journal_name_full 'American Mineralogist'
_journal_volume 70 
_journal_year 1985
_journal_page_first 1298
_journal_page_last 1308
_publ_section_title
;
 Crystal structure refinement of anandite-2Or, a barium-
 and sulfur-bearing trioctahedral mica
;
_database_code_amcsd 0001004
_chemical_formula_sum '(Ba1.91 K.064 Na.026) Mg.61 Fe7.82 Al.21 Mn.16 Si5.2 O22 S2 H4'
_cell_length_a 5.439
_cell_length_b 9.509
_cell_length_c 19.878
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 1028.079
_exptl_crystal_density_diffrn      4.192
_symmetry_space_group_name_H-M 'P n m n'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2-x,1/2+y,1/2+z'
  '1/2+x,1/2-y,1/2-z'
  '1/2+x,1/2+y,1/2-z'
  '1/2-x,1/2-y,1/2+z'
  'x,-y,z'
  '-x,y,-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
Ba   0.66790   0.00000   0.25530   0.95500   0.02584
K   0.66790   0.00000   0.25530   0.03200   0.02584
Na   0.66790   0.00000   0.25530   0.01300   0.02584
MgM1   0.00000   0.00000   0.00000   0.53000   0.00925
FeM1   0.00000   0.00000   0.00000   0.40000   0.00925
AlM1   0.00000   0.00000   0.00000   0.07000   0.00925
FeM2   0.50000   0.50000   0.00000   1.00000   0.01051
FeM3   0.00000   0.65590   0.00000   1.00000   0.01115
FeM4   0.50000   0.16900   0.00000   0.81000   0.01013
MgM4   0.50000   0.16900   0.00000   0.04000   0.01013
MnM4   0.50000   0.16900   0.00000   0.08000   0.01013
AlM4   0.50000   0.16900   0.00000   0.07000   0.01013
SiT1   0.16650   0.16170   0.13870   1.00000   0.00874
SiT2   0.67010   0.66670   0.14030   0.30000   0.01393
FeT2   0.67010   0.66670   0.14030   0.70000   0.01393
O1   0.15930   0.16250   0.05760   1.00000   0.00950
O2   0.67620   0.66880   0.05060   1.00000   0.01330
O3   0.41240   0.22930   0.17060   1.00000   0.02989
O4   0.92640   0.76710   0.17340   1.00000   0.02736
O5   0.16380   0.00000   0.16560   1.00000   0.05003
O6   0.66210   0.50000   0.18110   1.00000   0.03344
O-H   0.66740   0.00000   0.05090   1.00000   0.01216
S   0.16650   0.50000   0.08380   1.00000   0.02381
HS   0.67090   0.00000   0.09030   1.00000   0.02533
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
Ba 0.02503 0.04169 0.01001 0.00000 0.00000 0.00000
K 0.02503 0.04169 0.01001 0.00000 0.00000 0.00000
Na 0.02503 0.04169 0.01001 0.00000 0.00000 0.00000
MgM1 0.01034 0.01054 0.00801 0.00000 0.00055 0.00000
FeM1 0.01034 0.01054 0.00801 0.00000 0.00055 0.00000
AlM1 0.01034 0.01054 0.00801 0.00000 0.00055 0.00000
FeM2 0.01424 0.01008 0.00801 0.00000 -0.00164 0.00000
FeM3 0.00959 0.01741 0.00601 0.00000 0.00055 0.00000
FeM4 0.01169 0.01008 0.00801 0.00000 0.00000 0.00000
MgM4 0.01169 0.01008 0.00801 0.00000 0.00000 0.00000
MnM4 0.01169 0.01008 0.00801 0.00000 0.00000 0.00000
AlM4 0.01169 0.01008 0.00801 0.00000 0.00000 0.00000
SiT1 0.01379 0.00962 0.00200 0.00000 0.00000 0.00000
SiT2 0.01469 0.02016 0.00601 0.00052 0.00000 0.00192
FeT2 0.01469 0.02016 0.00601 0.00052 0.00000 0.00192
O1 0.01379 0.01099 0.00400 0.00000 0.00219 0.00000
O2 0.00899 0.01328 0.01802 -0.00105 0.00274 0.00287
O3 0.02818 0.04581 0.01601 -0.01048 -0.00931 0.00287
O4 0.02563 0.04535 0.01201 -0.01048 0.00876 0.00383
O5 0.13009 0.01237 0.00801 0.00000 0.00000 0.00000
O6 0.02668 0.05818 0.01601 0.00000 0.00110 0.00000
S 0.01634 0.01374 0.00801 0.00000 -0.00055 0.00000

Other Language Names for Brittle MicaHide

Simplified Chinese:脆云母
脆云母类

Relationship of Brittle Mica to other SpeciesHide

Member of:

Mica Group

Other Members of this group:

Dioctahedral mica	A major subgroup of the micas, where there are two octahedrally coordinated D cations per formula unit.
Fluorluanshiweiite	KLiAl_1.5(Si_3.5Al_0.5)O₁₀F₂	Mon. 2/m : B2/m
Luanshiweiite	KLiAl_1.5(Si_3.5Al_0.5)O₁₀(OH)₂	Mon. 2/m : B2/b
Montdorite	(K,Na)₂(Fe²⁺,Mn²⁺,Mg)₅(Si₄O₁₀)₂(OH,F)₄	Mon. 2/m : B2/m
Trioctahedral mica	A major subgroup of the micas, where there are three octahedrally coordinated D cations per formula unit.
UM1988-22-SiO:AlCaFFeHKLiMg	KLiMgAl₂Si₃O₁₀F₂	Mon.
UM2003-27-SiO:AlCsFFeHLi	CsFe²⁺₃(Si₃Al)O₁₀(F,OH)₂
UM2003-28-SiO:AlCsFFeHMg	Cs(Mg,Fe)₃(Si₃Al)O₁₀(F,OH)₂
UM2003-30-SiO:AlFLiRb	RbLi₂AlSi₄O₁₀(F,OH)₂
UM2003-31-SiO:AlHFeRb	RbFe²⁺₃(Si₃Al)O10(OH,F)₂
Voloshinite	Rb(LiAl_1.5◻_0.5)(Al_0.5Si_3.5)O₁₀F₂	Mon. 2/m : B2/b
Yangzhumingite	KMg_2.5(Si₄O₁₀)F₂	Mon. 2/m : B2/m

Group Members:

Anandite	(Ba,K)(Fe²⁺,Mg)₃((Si,Al,Fe)₄O₁₀)(S,OH)₂	Mon. 2/m : B2/b
Bityite	CaLiAl₂(AlBeSi₂O₁₀)(OH)₂	Mon. 2/m : B2/b
Chernykhite	(Ba,Na)(V³⁺,Al,Mg)₂((Si,Al)₄O₁₀)(OH)₂	Mon.
Chloroferrokinoshitalite	(Ba,K)(Fe²⁺,Mg)₃(Al₂Si₂O₁₀)(Cl,OH,F)₂
Clintonite	CaAlMg₂(SiAl₃O₁₀)(OH)₂	Mon. 2/m : B2/m
Ferrokinoshitalite	(Ba,K)(Fe²⁺,Mg)₃(Al₂Si₂O₁₀)(OH,F)₂	Mon. 2/m : B2/m
Fluorokinoshitalite	BaMg₃(Al₂Si₂O₁₀)F₂	Mon. 2/m : B2/m
Ganterite	(Ba,Na,K)(Al,Mg)₂(AlSi₃O₁₀)(OH)₂	Mon. 2/m : B2/b
Kinoshitalite	(Ba,K)(Mg,Mn²⁺,Al)₃(Al₂Si₂O₁₀)(OH)₂	Mon. 2/m : B2/m
Margarite	CaAl₂(Al₂Si₂O₁₀)(OH)₂	Mon. 2/m : B2/b
Oxykinoshitalite	(Ba,K)(Mg,Ti,Fe³⁺,Fe²⁺)₃((Si,Al)₄O₁₀)(O,OH,F)₂	Mon. 2/m : B2/m