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Clinochlore

A valid IMA mineral species - grandfathered
This page kindly sponsored by Mark Heintzelman
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About ClinochloreHide

Formula:
Mg5Al(AlSi3O10)(OH)8
Often contains considerable Fe2+, grading into chamosite.
Colour:
Green, yellowish green, olive green, blackish green, bluish green, white, pink
Lustre:
Greasy, Pearly, Dull
Hardness:
2 - 2½
Specific Gravity:
2.6 - 3.02
Crystal System:
Monoclinic
Member of:
Name:
Named in 1851 by William Phipps Blake from the Greek κλινειν "klinein", "to incline", in allusion to the inclined optic axes and the Greek χλωρο "chloros," for "green," its typical color. Clinochlore was originally named chlorite in 1789 by Abraham Gottlob Werner from the Greek χλωρο "chloros," for "green," its typical color. There are many named synonyms or varieties of clinochlore. Many names that have been attributed to minerals now called clinochlore, as well as chamosite, include: baltimorite, berlauite, chlorite, chlorophaeite, chromchlorit, corundophilite, daphnite, delessite, diabantite, euralite, faecherstein, grengesite, grochauite, helminthe, kaemmererite, kotschubeite, leuchtenbergite, lophoite, ogkoite, pattersonite, pennine, penninite, prochlorite, pyknochlorite, rhodochrome, rhodophyllite, ripidolite, rumpfite, seraphinite, sheridanite, specksten, talgsten, and many others.
The VIAl analogue of vakhrushevaite.

One of the most common members of the chlorite group. It forms a solid solution series with its also very common Fe2+-analogue chamosite.
Because iron-bearing clinochlore may be variably oxidized, its appearance and optical properties may vary widely.

Alteration of chlorites may proceed to vermiculite-like or mixed layered structures.

There are at least six chlorite polytypes known and stacking disorder is common (Kogure & Banfield, 1998).

Substitution of Cr(III) for Al may make clinochlore look pink to pale purple (variety kämmererite).
Sheridanite is an Al-rich variety.
Sudoite is a chemically similar, more Al-rich member of the chlorite group.
Amesite (a member of the kaolinite-serpentine group) is also chemically similar but more Al rich.

Compare also the chemically similar, but Al-poor kulkeite.




Unique IdentifiersHide

Mindat ID:
1070
Long-form identifier:
mindat:1:1:1070:8

IMA Classification of ClinochloreHide

Approved, 'Grandfathered' (first described prior to 1959)

Classification of ClinochloreHide

9.EC.55

9 : SILICATES (Germanates)
E : Phyllosilicates
C : Phyllosilicates with mica sheets, composed of tetrahedral and octahedral nets
Dana 7th ed.:
71.4.1.4
71.4.1.4

71 : PHYLLOSILICATES Sheets of Six-Membered Rings
4 : Sheets of 6-membered rings interlayered 1:1, 2:1, and octahedra
16.19.17

16 : Silicates Containing Aluminum and other Metals
19 : Aluminosilicates of Fe and Mg

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.

SymbolSourceReference for Standard
ClcIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43
ClcSiivolam & Schmid (2007)Siivolam, J. and Schmid, R. (2007) Recommendations by the IUGS Subcommission on the Systematics of Metamorphic Rocks: List of mineral abbreviations. Web-version 01.02.07. IUGS Commission on the Systematics in Petrology. download
ClcWhitney & Evans (2010)Whitney, D.L. and Evans, B.W. (2010) Abbreviations for names of rock-forming minerals. American Mineralogist, 95, 185–187 doi:10.2138/am.2010.3371
CchThe Canadian Mineralogist (2019)The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download
ClcWarr (2020)Warr, L.N. (2020) Recommended abbreviations for the names of clay minerals and associated phases. Clay Minerals, 55, 261–264 doi:10.1180/clm.2020.30

Physical Properties of ClinochloreHide

Greasy, Pearly, Dull
Transparency:
Transparent, Translucent
Colour:
Green, yellowish green, olive green, blackish green, bluish green, white, pink
Comment:
End-member clinochlore is white to colorless. Ferrous and ferric iron substitutions may darken the colour of clinochlore to medium or dark green and near-black. Chromian clinochlores may be pink to purple. Other substitutions may change the colour to golden brown.
Streak:
Greenish white to white
Hardness:
2 - 2½ on Mohs scale
Tenacity:
Flexible
Cleavage:
Perfect
{001} Perfect
Fracture:
Micaceous
Density:
2.6 - 3.02 g/cm3 (Measured)    2.628 g/cm3 (Calculated)

Optical Data of ClinochloreHide

Type:
Biaxial (+)
RI values:
nα = 1.571 - 1.588 nβ = 1.571 - 1.589 nγ = 1.576 - 1.599
Max. Birefringence:
δ = 0.005 - 0.011
Based on recorded range of RI values above.

Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.

Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.

Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.

Surface Relief:
Moderate (positive)
Relative to Canada balsam mounting medium (n ≈ 1.537).

This shows the grain boundary and Becke line effect under plane-polarised light, based on the contrast between this mineral's average refractive index and the mounting medium. It does not take into account mineral colouration.
In focus
Interference Figure:
This shows the idealized biaxial acute bisectrix (Bxa) interference figure - the conoscopic view for a grain cut perpendicular to the acute bisectrix, using this mineral's 2V. The two small white dots mark the melatopes - the points where the two optic axes emerge - and are shown only when they fall within the field of view. The coloured bands are isochromatics, and the dark bands are isogyres.

Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.

No measured or calculated 2V is on file for this mineral, so the value used here (29°) is estimated from its recorded refractive indices and optic sign, not from a direct 2V measurement.
Dispersion:
r < v
Pleochroism:
Visible
Comments:
X= light yellow-green to light blue-green
Y=Z= light greenish yellow to light blue-green

Chemistry of ClinochloreHide

Mindat Formula:
Mg5Al(AlSi3O10)(OH)8

Often contains considerable Fe2+, grading into chamosite.
Element Weights:
Element% weight
O51.816 %
Mg21.865 %
Si15.160 %
Al9.709 %
H1.451 %

Calculated from ideal end-member formula.
Common Impurities:
Fe,Mn,Zn,Ca,Cr

Crystallography of ClinochloreHide

Polytype:
Formula:
Crystal System:
Class (H-M)
Space Group:
Space Group Setting:
Cell Parameters:
Ratio:
Unit Cell Volume (calc):
Z:
Comment:
Clinochlore-1MIaClinochlore-1MIbClinochlore-1MIIbClinochlore-2MIIbClinochlore-IaClinochlore-IIb
Mg5Al(AlSi3O10)(OH)8Mg5Al(AlSi3O10)(OH)8Mg5Al(AlSi3O10)(OH)8Mg5Al(AlSi3O10)(OH)8Mg5Al(AlSi3O10)(OH)8Mg5Al(AlSi3O10)(OH)8
      
      
      
      






      
      
      
      

Crystallographic forms of ClinochloreHide

Crystal Atlas:
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Clinochlore no.72 - {101} - Goldschmidt (1913-1926)
3d models and HTML5 code kindly provided by www.smorf.nl.

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0007298ClinochloreZanazzi P F, Comodi P, Nazzareni S, Andreozzi G B (2009) Thermal behaviour of chlorite: an in situ single-crystal and powder diffraction study European Journal of Mineralogy 21 581-5892009Val Malenco, Italy0298
0004250ClinochloreZanazzi P F, Montagnoli M, Nazzareni S, Comodi P (2006) Structural effects of pressure on chlorite: A single-crystal study American Mineralogist 91 1871-18782006Alpe Reguzzolo, Val Malenco, Italy0.0001293
0010543ClinochloreMcMurchy R C (1934) The crystal structure of the chlorite minerals Zeitschrift fur Kristallographie 88 420-4321934Miles City, Montana, USA0293
0007299ClinochloreZanazzi P F, Comodi P, Nazzareni S, Andreozzi G B (2009) Thermal behaviour of chlorite: an in situ single-crystal and powder diffraction study European Journal of Mineralogy 21 581-5892009Val Malenco, Italy0574
0007300ClinochloreZanazzi P F, Comodi P, Nazzareni S, Andreozzi G B (2009) Thermal behaviour of chlorite: an in situ single-crystal and powder diffraction study European Journal of Mineralogy 21 581-5892009Val Malenco, Italy0672
0007301ClinochloreZanazzi P F, Comodi P, Nazzareni S, Andreozzi G B (2009) Thermal behaviour of chlorite: an in situ single-crystal and powder diffraction study European Journal of Mineralogy 21 581-5892009Val Malenco, Italy0775
0004251ClinochloreZanazzi P F, Montagnoli M, Nazzareni S, Comodi P (2006) Structural effects of pressure on chlorite: A single-crystal study American Mineralogist 91 1871-18782006Alpe Reguzzolo, Val Malenco, Italy1.83293
0004252ClinochloreZanazzi P F, Montagnoli M, Nazzareni S, Comodi P (2006) Structural effects of pressure on chlorite: A single-crystal study American Mineralogist 91 1871-18782006Alpe Reguzzolo, Val Malenco, Italy3.14293
0004253ClinochloreZanazzi P F, Montagnoli M, Nazzareni S, Comodi P (2006) Structural effects of pressure on chlorite: A single-crystal study American Mineralogist 91 1871-18782006Alpe Reguzzolo, Val Malenco, Italy4.25293
0004254ClinochloreZanazzi P F, Montagnoli M, Nazzareni S, Comodi P (2006) Structural effects of pressure on chlorite: A single-crystal study American Mineralogist 91 1871-18782006Alpe Reguzzolo, Val Malenco, Italy4.85293
0002739ClinochloreWelch M D, Marshall W G (2001) High-pressure behaviour of clinochlore American Mineralogist 86 1380-138620010293
0002314ClinochloreGuggenheim S, Zhan W (1999) Crystal structures of two partially dehydrated chlorites: The "modified" chlorite structure American Mineralogist 84 1415-142119990293
0002313ClinochloreGuggenheim S, Zhan W (1999) Crystal structures of two partially dehydrated chlorites: The "modified" chlorite structure American Mineralogist 84 1415-142119990293
0000771ClinochlorePhillips T L, Loveless J K, Bailey S W (1980) Cr3+ coordination in chlorites: a structural study of ten chromian chlorites Siskiyou Co., Calif. American Mineralogist 65 112-12219800293
0000770ClinochlorePhillips T L, Loveless J K, Bailey S W (1980) Cr3+ coordination in chlorites: a structural study of ten chromian chlorites Day Book Body, N. C. American Mineralogist 65 112-12219800293
0000119ClinochloreBrown B E, Bailey S W (1963) Chlorite polytypism: II. Crystal structure of a one-layer Cr-chlorite American Mineralogist 48 42-6119630293
0001619ClinochloreNelson D O, Guggenheim S (1993) Inferred limitations to the oxidation of Fe in chlorite: a high-temperature single-crystal X-ray study American Mineralogist 78 1197-120719930823
0002740ClinochloreWelch M D, Marshall W G (2001) High-pressure behaviour of clinochlore American Mineralogist 86 1380-138620011.2293
0002741ClinochloreWelch M D, Marshall W G (2001) High-pressure behaviour of clinochlore American Mineralogist 86 1380-138620012.46293
0002742ClinochloreWelch M D, Marshall W G (2001) High-pressure behaviour of clinochlore American Mineralogist 86 1380-138620014.65293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Loading XRD data...
Data Set:
Data courtesy of RRUFF project at University of Arizona, used with permission.
Powder Diffraction Data:
d-spacingIntensity
14.0 Å(80)
7.08 Å(80)
4.73 Å(40)
4.59 Å(40b)
3.545 Å(60)
2.842 Å(20)
2.648 Å(20)
2.582 Å(40)
2.543 Å(100)
2.439 Å(50)
2.381 Å(20)
2.260 Å(20)
2.066 Å(10)
2.003 Å(40)
1.883 Å(10)
1.822 Å(10)
1.742 Å(10b)
1.660 Å(10)
1.563 Å(10)
1.538 Å(60)
1.503 Å(10)
1.462 Å(10)
1.413 Å(5)
1.392 Å(10)
1.349 Å(5)
1.320 Å(10)
1.300 Å(5)
1.291 Å(5)
1.219 Å(5)
1.539 Å(100)
Comments:
ICDD 7-165; berthierine plus clinochlore are easily mistaken for chamosite.

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 2: Planetesimal differentiation and alteration4.566-4.550
6 : Secondary asteroid phases4.566-4.560
Stage 3b: Earth’s earliest hydrosphere>4.45
13 : Hadean serpentinization
Near-surface Processes
26 : Hadean detrital minerals
Stage 5: Initiation of plate tectonics<3.5-2.5
38 : Ophiolites
40 : Regional metamorphism (greenschist, amphibolite, granulite facies)
Geological Setting:
Hydrothermal alteration product of amphibole, pyroxene, and biotite in many igneous rocks. An important rock forming mineral in many sedimentary and metamorphic rocks.

Type Occurrence of ClinochloreHide

Synonyms of ClinochloreHide

Other Language Names for ClinochloreHide

Varieties of ClinochloreHide

Chromium-bearing ClinochloreA lilac to purple, Cr-bearing variety of clinochlore. Also commonly known as kämmererite.
See also vakhrushevaite, the Cr analogue of clinochlore.
ColerainiteAn obsolete synonym for a fine grained white "sheridanite" (a variety of clinochlore).
CorundophiliteAn Al-rich variety of clinochlore.
DiabantiteAn Fe(II)-bearing (ferroan) and Si-rich clinochlore.
LeuchtenbergiteA (nearly) iron-free variety of clinochlore (which usual contains some Fe replacing Mg). Very common in the magnesite/serpentine deposits of Austria and Norway.
Nickel-bearing ClinochloreA nickel-bearing variety of clinochlore.
PennineA pseudo-trigonal variety of clinochlore.
PenniniteAn Si-rich, Fe-poor variety of clinochlore

Used by Hey (1954) in his widely used, formal classification of chlorites, for ones with Mg/(Mg+Fe) = 0.75-1.0 and Si = 6.2-7 atoms per 8 tetrahedral sites, but now considered a variety of clinochlore.

Probably...
PycnochloriteUsed by Hey (1954) in his widely used, formal classification of chlorites, for ones with Mg/(Mg+Fe) = 0.75-0.5 and Si = 5.6-6.2 atoms per 8 tetrahedral sites, but now considered a variety of clinochlore.

Originally spelled pyknochlorite (from German Pykn...
RipidoliteOriginally a ferroan variety of Clinochlore described from Akhmatovskaya Kop (Achmatovsk Mine), Nazyamskiye Mt, Zlatoust, Ilmen Mts, Chelyabinsk Oblast', Urals Region, Russia. Ripidolite has been historically used as a name for intermediate and undetermi...
SeraphiniteA variety of clinochlore with a radiating/plumose structure which is used for carving and as a decorative stone.
SheridaniteAn aluminium-rich clinochlore (compare also sudoite).

A Si-rich, Fe-poor variety of clinochlore.

Used by Hey (1954) in his widely used, formal classification of chlorites, for ones with Mg/(Mg+Fe) = 0.75-1.0 and Si = 5.6-6.2 atoms per 8 tetrahedral site...
Talc-chloriteA very Si-rich, Al poor, variety of clinochlore (classification of Hey, 1954).
Weissite (of Trolle-Wachtmeister)Described as an unusual white variety of chlorite (clinochlore). Compare also leuchtenbergite.

Relationship of Clinochlore to other SpeciesHide

Member of:
Other Members of Chlorite Group:
BaileychloreZn5Al(AlSi3O10)(OH)8Tric. 1
Borocookeite(LiAl4◻)[BSi3O10](OH)8Mon. m : Bb
ChamositeFe2+5Al(AlSi3O10)(OH)8Mon. 2/m : B2/m
Cookeite(LiAl4◻)[AlSi3O10](OH)8Mon. 2/m
DonbassiteAl4.33(AlSi3O10)(OH)8Mon. 2 : B2
FranklinfurnaceiteCa2Fe3+Mn2+3Mn3+(Zn2Si2O10)(OH)8Mon. 2 : B2
GlagoleviteNa(Mg,Al)6(AlSi3O10)(OH,O)8Tric. 1 : P1
GonyeriteMn2+5Fe3+(Fe3+Si3O10)(OH)8Orth.
NimiteNi5Al(AlSi3O10)(OH)8Mon. 2/m : B2/m
PennantiteMn2+5Al(AlSi3O10)(OH)8Tric.
SudoiteMg2Al3(AlSi3O10)(OH)8Mon. 2/m : B2/m
VakhrushevaiteMg5Cr(AlSi3O10)(OH)8Tric. 1
Forms a series with:

Common AssociatesHide

Associations Based on Photo Data:
408 photos of Clinochlore associated with QuartzSiO2
392 photos of Clinochlore associated with 'Hessonite'Ca3Al2(SiO4)3
331 photos of Clinochlore associated with GrossularCa3Al2(SiO4)3
327 photos of Clinochlore associated with DiopsideCaMgSi2O6
243 photos of Clinochlore associated with TitaniteCaTiO(SiO4)
240 photos of Clinochlore associated with MagnetiteFe2+Fe3+2O4
231 photos of Clinochlore associated with Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
224 photos of Clinochlore associated with VesuvianiteCa19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9
212 photos of Clinochlore associated with CalciteCaCO3
167 photos of Clinochlore associated with AndraditeCa3Fe3+2(SiO4)3

Related Minerals - Strunz-mindat GroupingHide

9.EC.MeifuiteKFe6(Si7Al)O19(OH)4Cl2Tric. 1 : P1
9.EC.BalestraiteKLi2V5+Si4O12Mon. 2 : B2
9.EC.05TalcMg3Si4O10(OH)2Tric. 1 : P1
9.EC.05MinnesotaiteFe2+3Si4O10(OH)2Tric. 1 : P1
9.EC.05WillemseiteNi3Si4O10(OH)2Mon.
9.EC.9.EC.VoloshiniteRb(LiAl1.50.5)(Al0.5Si3.5)O10F2Mon. 2/m : B2/b
9.EC.10FluorluanshiweiiteKLiAl1.5(Si3.5Al0.5)O10F2Mon. 2/m : B2/m
9.EC.10GarmiteCsLiMg2(Si4O10)F2Mon.
9.EC.10GorbunoviteCsLi2(Ti,Fe)Si4O10(F,OH,O)2Mon.
9.EC.10FerripyrophylliteFe3+Si2O5(OH)Mon. 2/m
9.EC.10ManganiceladoniteK(MgMn3+◻)(Si4O10)(OH)2Mon.
9.EC.10LuanshiweiiteKLiAl1.5(Si3.5Al0.5)O10(OH)2Mon. 2/m : B2/b
9.EC.10PyrophylliteAl2Si4O10(OH)2Tric. 1
9.EC.15ParagoniteNaAl2(AlSi3O10)(OH)2Mon.
9.EC.15FerroaluminoceladoniteK(Fe2+Al◻)(Si4O10)(OH)2Mon. 2/m : B2/m
9.EC.15NanpingiteCsAl2(AlSi3O10)(OH,F)2Mon. 2/m : B2/b
9.EC.15FerroceladoniteK(Fe2+Fe3+◻)(Si4O10)(OH)2Mon. 2/m : B2/m
9.EC.15GanteriteBa0.5(Na,K)0.5Al2(Si2.5Al1.5)O10(OH)2Mon. 2/m : B2/b
9.EC.15KreiteriteCsLi2Fe3+(Si4O10)F2Mon.
9.EC.15RoscoeliteKV3+2(AlSi3O10)(OH)2Mon. 2/m : B2/b
9.EC.15AluminoceladoniteK(MgAl◻)(Si4O10)(OH)2Mon. 2/m : B2/m
9.EC.15Tobelite(NH4)Al2(AlSi3O10)(OH)2Mon. 2/m : B2/m
9.EC.15TainioliteKLiMg2(Si4O10)F2Mon. 2/m : B2/m
9.EC.15CeladoniteK(MgFe3+◻)(Si4O10)(OH)2Mon. 2/m : B2/m
9.EC.15ChromceladoniteK(MgCr◻)(Si4O10)(OH)2Mon. 2 : B2
9.EC.15MontdoriteKFe2+1.5Mn2+0.5Mg0.5Si4O10(F,OH)2Mon. 2/m : B2/m
9.EC.15ChromphylliteKCr2(AlSi3O10)(OH)2Mon. 2/m : B2/b
9.EC.15BoromuscoviteKAl2(BSi3O10)(OH)2Mon. 2/m
9.EC.15'UM1988-22-SiO:AlCaFFeHKLiMg'KLiMgAl2Si3O10F2Mon.
9.EC.15Chernykhite(Ba,Na)(V3+,Al,Mg)2((Si,Al)4O10)(OH)2Mon.
9.EC.15MuscoviteKAl2(AlSi3O10)(OH)2Mon. 2/m : B2/b
9.EC.20MasutomiliteK(LiAlMn2+)[AlSi3O10]F2Mon. 2 : B2
9.EC.20OxyphlogopiteK(Mg,Ti,Fe)3[(Si,Al)4O10](O,F)2Mon. 2/m : B2/m
9.EC.20'Chloroferrokinoshitalite'(Ba,K)(Fe2+,Mg)3(Al2Si2O10)(Cl,OH,F)2
9.EC.20SiderophylliteKFe2+2Al(Al2Si2O10)(OH)2Mon.
9.EC.20SokolovaiteCsLi2Al(Si4O10)F2Mon.
9.EC.20HendricksiteKZn3(Si3Al)O10(OH)2Mon. 2/m : B2/m
9.EC.20TetraferriphlogopiteKMg3(Si3Fe3+)O10(OH)2Mon. 2/m : B2/m
9.EC.20FluoranniteKFe2+3(Si3Al)O10F2Mon. 2/m : B2/m
9.EC.20AspidoliteNaMg3(AlSi3O10)(OH)2Mon. 2/m : B2/m
9.EC.20Suhailite(NH4)Fe2+3(AlSi3O10)(OH)2Mon. 2/m : B2/m
9.EC.20EphesiteNaLiAl2(Al2Si2O10)(OH)2Tric. 1 : P1
9.EC.20NorrishiteKLiMn3+2(Si4O10)O2Mon. 2/m : B2/m
9.EC.20PhlogopiteKMg3(AlSi3O10)(OH)2Mon. 2/m : B2/m
9.EC.20YangzhumingiteKMg2.5(Si4O10)F2Mon. 2/m : B2/m
9.EC.20OrloviteKLi2Ti(Si4O10)OFMon. 2 : B2
9.EC.20TetraferrianniteKFe2+3(Si3Fe3+)O10(OH)2Mon. 2/m : B2/m
9.EC.20ShirokshiniteK(NaMg2)(Si4O10)F2Mon. 2/m : B2/m
9.EC.20TrilithioniteK(Li1.5Al1.5)(AlSi3O10)(F,OH)2Mon. 2/m : B2/b
9.EC.20PolylithioniteKLi2Al(Si4O10)(F,OH)2Mon. 2/m : B2/b
9.EC.20ShirozuliteKMn2+3(Si3Al)O10(OH)2Mon. 2/m : B2/m
9.EC.20PreiswerkiteNaMg2Al(Al2Si2O10)(OH)2Mon. 2/m : B2/b
9.EC.20FluorophlogopiteKMg3(Si3Al)O10F2Mon. 2/m : B2/m
9.EC.20Wonesite(Na,K,◻)(Mg,Fe,Al)6(Si,Al)8O20(OH,F)4Mon. 2/m : B2/m
9.EC.20'UM2004-49-SiO:AlCsFHKLi'(Cs,K)(Al,Li)2.6((Si,Al)4O10)(F,OH)2
9.EC.20FluorotetraferriphlogopiteKMg3(Fe3+Si3O10)F2Mon. 2/m : B2/m
9.EC.20AnniteKFe2+3(AlSi3O10)(OH)2Mon. 2/m : B2/m
9.EC.20EastoniteKMg2Al(Al2Si2O10)(OH)2Mon.
9.EC.22'Pimelite'Ni3Si4O10(OH)2 · 4H2OHex.
9.EC.30MargariteCaAl2(Al2Si2O10)(OH)2Mon. 2/m : B2/b
9.EC.35Kinoshitalite(Ba,K)(Mg,Mn2+,Al)3(Al2Si2O10)(OH)2Mon. 2/m : B2/m
9.EC.35Ferrokinoshitalite(Ba,K)(Fe2+,Mg)3(Al2Si2O10)(OH,F)2Mon. 2/m : B2/m
9.EC.35ClintoniteCaAlMg2(SiAl3O10)(OH)2Mon. 2/m : B2/m
9.EC.35Oxykinoshitalite(Ba,K)(Mg,Ti,Fe3+,Fe2+)3((Si,Al)4O10)(O,OH,F)2Mon. 2/m : B2/m
9.EC.35FluorokinoshitaliteBaMg3(Al2Si2O10)F2Mon. 2/m : B2/m
9.EC.35BityiteCaLiAl2(AlBeSi2O10)(OH)2Mon. 2/m : B2/b
9.EC.35Anandite(Ba,K)(Fe2+,Mg)3((Si,Al,Fe)4O10)(S,OH)2Mon. 2/m : B2/b
9.EC.40Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2OMon. 2/m : B2/m
9.EC.40Beidellite(Na,Ca0.5)0.3Al2((Si,Al)4O10)(OH)2 · nH2OMon. 2/m : B2/m
9.EC.40VolkonskoiteCa0.3(Cr,Mg,Fe)2((Si,Al)4O10)(OH)2 · 4H2OMon.
9.EC.40NontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2OMon. 2/m : B2/m
9.EC.40Kurumsakite(Zn,Ni,Cu)8Al8V5+2Si5O35 · 27H2O (?)Orth.
9.EC.40Yakhontovite(Ca,Na)0.5(Cu,Fe,Mg)2(Si4O10)(OH)2 · 3H2OMon.
9.EC.45SwineforditeLi(Al,Li,Mg)3((Si,Al)4O10)2(OH,F)4 · nH2OMon. 2/m : B2/m
9.EC.45HectoriteNa0.3(Mg,Li)3(Si4O10)(F,OH)2Mon. 2/m : B2/m
9.EC.45ZincsiliteZn3Si4O10(OH)2 · 4H2O (?)Mon.
9.EC.45HanjiangiteBa2CaV3+Al(H2AlSi3O12)(CO3)2FMon. 2 : B2
9.EC.45SpadaiteMgSiO2(OH)2 · H2O (?)
9.EC.45FerrosaponiteCa0.3(Fe2+,Mg,Fe3+)3((Si,Al)4O10)(OH)2 · 4H2OMon.
9.EC.45Stevensite(Ca,Na)xMg3-x(Si4O10)(OH)2Mon.
9.EC.45SaponiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2OMon.
9.EC.45SauconiteNa0.3Zn3((Si,Al)4O10)(OH)2 · 4H2OMon.
9.EC.50VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2OMon. 2/m
9.EC.52'Tarasovite'near NaKAl11Si13O40(OH)9 · 3H2O
9.EC.55Borocookeite(LiAl4◻)[BSi3O10](OH)8Mon. m : Bb
9.EC.55FranklinfurnaceiteCa2Fe3+Mn2+3Mn3+(Zn2Si2O10)(OH)8Mon. 2 : B2
9.EC.55PennantiteMn2+5Al(AlSi3O10)(OH)8Tric.
9.EC.55VakhrushevaiteMg5Cr(AlSi3O10)(OH)8Tric. 1
9.EC.55NimiteNi5Al(AlSi3O10)(OH)8Mon. 2/m : B2/m
9.EC.55Cookeite(LiAl4◻)[AlSi3O10](OH)8Mon. 2/m
9.EC.55GonyeriteMn2+5Fe3+(Fe3+Si3O10)(OH)8Orth.
9.EC.55ChamositeFe2+5Al(AlSi3O10)(OH)8Mon. 2/m : B2/m
9.EC.55'Orthochamosite'(Fe2+,Mg,Fe3+)5Al(AlSi3O10)(OH,O)8
9.EC.55BaileychloreZn5Al(AlSi3O10)(OH)8Tric. 1
9.EC.55SudoiteMg2Al3(AlSi3O10)(OH)8Mon. 2/m : B2/m
9.EC.55GlagoleviteNa(Mg,Al)6(AlSi3O10)(OH,O)8Tric. 1 : P1
9.EC.55DonbassiteAl4.33(AlSi3O10)(OH)8Mon. 2 : B2
9.EC.60DozyiteMg7Al2(Al2Si4O15)(OH)12Mon.
9.EC.60Rectorite(Na,Ca)Al4((Si,Al)8O20)(OH)4 · 2H2OMon.
9.EC.60Corrensite(Mg,Fe)9((Si,Al)8O20)(OH)10 · nH2OOrth.
9.EC.60AliettiteCa0.2Mg6((Si,Al)8O20)(OH)4 · 4H2OMon.
9.EC.60Karpinskite(Ni,Mg)2Si2O5(OH)2 (?)Mon.
9.EC.60LunijianlaiteLi0.7Al6.2(AlSi7O20)(OH,O)10Mon.
9.EC.60TosuditeNa0.5(Al,Mg)6((Si,Al)8O18)(OH)12 · 5H2OMon. 2 : B2
9.EC.60HydrobiotiteK(Mg,Fe2+)6((Si,Al)8O20)(OH)4 · nH2OMon. 2/m : B2/m
9.EC.60Saliotite(Li,Na)Al3(AlSi3O10)(OH)5Mon. 2/m : B2/m
9.EC.60KulkeiteMg8Al(AlSi7O20)(OH)10Mon.
9.EC.60BrinrobertsiteNa0.3Al4(Si4O10)2(OH)4 · 3.5 H2OMon.
9.EC.65Macaulayite(Fe,Al)24Si4O43(OH)2Mon.
9.EC.70BurckhardtitePb2(Fe3+Te6+)[AlSi3O8]O6Trig. 3m(32/m) : P31m
9.EC.75Niksergievite(Ba,Ca)2Al3(AlSi3O10)(CO3)(OH)6 · nH2OMon.
9.EC.75Ferrisurite(Pb,Ca)2.4Fe3+2(Si4O10)(CO3)1.7(OH)3 · nH2OMon.
9.EC.75Surite(Pb,Ca)3(Al,Fe2+,Mg)2((Si,Al)4O10)(CO3)2(OH)2Mon. 2 : P21
9.EC.80KegelitePb8Al4(Si8O20)(SO4)2(CO3)4(OH)8Mon.

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