Clintonite Mineral Data
General Clintonite Information
Chemical Formula:
Ca(Mg,Al)3(Al3Si)O10(OH)2
Composition:
Molecular Weight = 415.81 gm
Calcium 9.64 % Ca 13.49 % CaO
Magnesium 12.86 % Mg 21.32 % MgO
Aluminum 22.06 % Al 41.69 % Al2 O3
Silicon 8.78 % Si 18.79 % SiO2
Hydrogen 0.48 % H 4.33 % H2 O
Oxygen 46.17 % O
______ ______
100.00 % 99.62 % = TOTAL OXIDE
Empirical Formula:
CaMg2.2 Al0.7 Al2.7 Si1.3 O10 (OH)2
Environment:
Serpentinized limestones and siliceous skarns near contact metamorphic zones.
IMA Status:
Valid Species (Pre-IMA) 1843
Locality:
Amity, Warwick, Orange Co., New York, USA. Link to MinDat.org Location Data.
Name Origin:
Named for De Witt Clinton (1769-1828), American statesman.
Synonym:
Brandesite
Calciotalc
Seybertite
Xanthophyllite
Clintonite Image
Images:
Clintonite
Comments: Several interconnected platy crystals of black clintonite variety xanthophyllite on vuggy matrix.
Location: Green Monster Mountain, Prince of Wales Island, Prince of Wales-Outer Ketchikan Co., Alaska, USA.
Scale: 4x3x2 cm.
© John Betts - Fine Minerals
Clintonite Crystallography
Axial Ratios:
a:b:c =0.5808:1:1.1244
Cell Dimensions:
a = 5.306, b = 9.135, c = 10.272, Z = 2; beta = 100.01° V = 490.31 Den(Calc)= 2.82
Crystal System:
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m
X Ray Diffraction:
By Intensity(I/Io ): 2.56(1), 3.21(0.7), 2.11(0.7), 1.505(0.6), 1.485(0.5), 2.45(0.5), 9.68(0.5),
Physical Properties of Clintonite
Cleavage:
{001} Perfect
Color:
Colorless, Green, Yellow, Red, Reddish brown.
Density:
3 - 3.1, Average = 3.05
Diaphaneity:
Transparent to translucent
Fracture:
Brittle - Generally displayed by glasses and most non-metallic minerals.
Habit:
Massive - Lamellar - Distinctly foliated fine-grained forms.
Habit:
Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Hardness:
4-5 - Fluorite-Apatite
Luminescence:
Non-fluorescent.
Luster:
Pearly
Streak:
colorless
Optical Properties of Clintonite
Gladstone-Dale:
CI meas = -0.016 (Superior) - where the CI = (1-KPDmeas /KC ) CI calc = -0.099 (Poor) - where the CI = (1-KPDcalc /KC )
KPDcalc = 0.232,KPDmeas = 0.2145,KC = 0.2111 Ncalc = 1.6 - 1.65
Optical Data:
Biaxial (-), a=1.643-1.648, b=1.655-1.662, g=1.655-1.663, bire=0.0120-0.0150, 2V(Calc)=0-28, 2V(Meas)=2-40. Dispersion none.
Pleochroism (x):
colorless, pale orange, or reddish brown.
Calculated Properties of Clintonite
Electron Density:
Bulk Density (Electron Density)=3.03 gm/cc note: Specific Gravity of Clintonite =3.05 gm/cc.
Fermion Index:
Fermion Index = 0.01 Boson Index = 0.99
Photoelectric:
PEClintonite = 2.46 barns/electronU=PEClintonite x r Electron Density= 7.46 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Clintonite is Not Radioactive
Clintonite Classification
Dana Class:
71.02.02c.02 (71) Phyllosilicate Sheets of Six-Membered Rings
(71.02) with 2:1 Layers
(71.02.02c) Mica Group (Margarite subgroup)
71.02.02c.01 Margarite CaAl2(Al2Si2)O10(OH)2 C 2/c 2/m
71.02.02c.02 Clintonite Ca(Mg,Al)3(Al3Si)O10(OH)2 C 2/m 2/m
71.02.02c.03 Bityite CaLiAl2(AlBeSi2)O10(OH)2 C 2/c 2/m
71.02.02c.04 Anandite (Ba,K)(Fe,Mg)3(Si,Al,Fe)4O10(S,OH)2 C 2/m 2/m
71.02.02c.05 Kinoshitalite (Ba,K)(Mg,Mn,Al)3Si2Al2O10(OH)2 C 2/m 2/m
71.02.02c.06 Ferrokinoshitalite ! (Ba,K)(Fe,Mg)3(Si2Al2)O10(OH,F)2 C 2/m 2/m
71.02.02c.07 Ganterite ! [Ba0.5(Na,K)0.5]Al2(Si2.5Al1.5O10)(OH)2 C 2/c 2/m
71.02.02c.08 Oxykinoshitalite ! (Ba,K)(Mg,Fe,Ti)3(Si,Al)4O10O2 C 2/m 2/m
Strunz Class:
09.EC.35 09 - SILICATES (Germanates)
09.E - Phyllosilicates
09.EC -Phyllosilicates with mica sheets, composed of tetrahedral and octahedral nets
09.EC.35 Clintonite Ca(Mg,Al)3(Al3Si)O10(OH)2 C 2/m 2/m
09.EC.35 Bityite CaLiAl2(AlBeSi2)O10(OH)2 C 2/c 2/m
09.EC.35 Anandite (Ba,K)(Fe,Mg)3(Si,Al,Fe)4O10(S,OH)2 C 2/m 2/m
09.EC.35 Kinoshitalite (Ba,K)(Mg,Mn,Al)3Si2Al2O10(OH)2 C 2/m 2/m
09.EC.35 Ferrokinoshitalite ! (Ba,K)(Fe,Mg)3(Si2Al2)O10(OH,F)2 C 2/m 2/m
09.EC.35 Oxykinoshitalite ! (Ba,K)(Mg,Fe,Ti)3(Si,Al)4O10O2 C 2/m 2/m
Other Clintonite Information
References:
NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic2)
See Also:
Links to other databases for Clintonite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Franklin Minerals(Dunn)
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - HyperPhysics
12 - MinDAT
13 - Mineralienatlas (Deutsch)
14 - Online Mineral Museum
15 - QUT Mineral Atlas
16 - Ruff.Info
17 - WWW-MINCRYST
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Clintonite
Ca(Mg,Al)3(Al3Si)O10(OH)2
Dana No: 71.02.02c.02 Strunz No: 09.EC.35
Locality:
Notes:
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