Liddicoatite Mineral Data + Say LIDDICOATITE


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General Liddicoatite Information
Help on Chemical Formula: Chemical Formula: Ca(Li,Al)3Al6(BO3)3Si6O18(O,OH,F)4
Help on Composition: Composition: Molecular Weight = 917.49 gm
   Sodium     0.75 %  Na    1.01 % Na2O
   Lithium    1.21 %  Li    2.61 % Li2O
   Calcium    3.06 %  Ca    4.28 % CaO
   Aluminum  18.23 %  Al   34.45 % Al2O3
   Silicon   18.37 %  Si   39.29 % SiO2
   Boron      3.53 %  B    11.38 % B2O3
   Hydrogen   0.32 %  H     2.85 % H2O
   Oxygen    52.66 %  O
   Fluorine   1.86 %  F     1.86 % F
               -   %  F    -0.78 % -O=F2
            ______        ______ 
            100.00 %       96.95 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca0.7Na0.3Li1.6Al6.2(BO3)3Si6O18.3(OH)2.9F0.9
Help on Environment: Environment: Detrital in soil, an apparent alluvial product of the local pegmatites.
Help on IMA Status: IMA Status: Approved IMA 1977 (Dana # Changed)
Help on Locality: Locality: From Antsirabe, Tsilaizina, and Anjanabonoina, Madagascar. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Richard T. Liddicot (1918-2003), gemologist, who invented the diamond grading system, for his many contributions to the Gemological Institute of America.
Help on Synonym: Synonym: Liddicoatite - (61.3.1.2)
  Tourmaline
 

Liddicoatite Image

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Liddicoatite

Comments: Dark green translucent liddicoatite crystal prism.
Location: Antandrokomby, Madagascar. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species
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Liddicoatite

Comments: Complexly colored red zone, and the skin which varies from green to yellow terminated crystals of liddicoatite.
Location: Anjanabonoina, Betafo, Antsirab? Madagascar. Scale: Specimen size: 3.3 x 1.8 x 1.5 cm.
© Fabre Minerals

Liddicoatite Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:0.44888
Help on Cell Dimensions: Cell Dimensions: a = 15.875, c = 7.126, Z = 3; V = 1,555.26 Den(Calc)= 2.94
Help on Crystal System: Crystal System: Trigonal - Ditrigonal PyramidalH-M Symbol (3m) Space Group: R 3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.933(1), 2.559(0.85), 3.962(0.55),3.445(0.5), 4.197(0.5), 2.025(0.4), 1.9054(0.35),
Click Here for Large Liddicoatite Structure Window Crystal Structure:

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Aurisicchio C , Demartin F , Ottolini L , Pezzotta F , European Journal of Mineralogy , 11 (1999) p.237-242, Homogeneous liddicoatite from Madagascar: a possible, reference material? First EMPA, SIMS and SREF data, Sample: 1, Locality: Madagascar

View Additional jPOWD Structure files for Liddicoatite
[1]
 

Physical Properties of Liddicoatite

Help on Cleavage: Cleavage: [0001] Poor
Help on Color: Color: Blue, Brown, Green, Pink, Red.
Help on Density: Density: 3.02
Help on Diaphaniety: Diaphaniety: Transparent to Subtranslucent
Help on Fracture: Fracture: Conchoidal - Uneven - Uneven fracture producing small, conchoidal fragments.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Habit: Habit: Triangular Crystals - Occurs as triangular shaped crystals.
Help on Hardness: Hardness: 7.5 - Garnet
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Liddicoatite

Help on Dichroism (e): Dichroism (e): light brown.
Help on Dichroism (w): Dichroism (w): dark brown.
Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.006 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.034 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2139,KPDmeas= 0.2083,KC= 0.207
Help on Optical Data: Optical Data: Uniaxial (-), e=1.621, w=1.637, bire=0.0160.
 

Calculated Properties of Liddicoatite

Help on Electron Density: Electron Density:

relectron=2.99 gm/cc
note: rLiddicoatite =3.02 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.01681
Boson Index = 0.98319
Help on Photoelectric: Photoelectric:

PELiddicoatite = 1.71 barns/electron
U=PELiddicoatite x relectron= 5.10 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Liddicoatite is Not Radioactive
 

Liddicoatite Classification
Help on Dana Class: Dana Class: 61.3b.1.2 (61)Cyclosilicate Six-Membered Rings
  (61.3b)with borate groups (Calcic Tourmaline Subgroup)
  (61.3b.1)Dana Group
 
61.3b.1.2 Liddicoatite ! Ca(Li,Al)3Al6(BO3)3Si6O18(O,OH,F)4 R 3m 3m
 
61.3b.1.3 Uvite! (Ca,Na)(Mg,Fe)3Al5Mg(BO3)3Si6O18(OH,F)4 R 3m 3m
 
61.3b.1.4 Feruvite! (Ca,Na)(Fe,Mg,Ti)3(Al,Mg,Fe)6(BO3)3Si6O18(OH)4 R 3m 3m
 
61.3b.1.5 IMA2000-030! CaMg3(Al5Mg)(Si6O18)(BO3)3(OH)3(OH) R 3m 3m
Help on Strunz Class: Strunz Class: VIII/E.19-80 VIII - Silicates
  VIII/E - Cyklosilicates, six rings [Si6O18]12-
  VIII/E.19 - Tourmaline group
 
VIII/E.19-05 Rossmanite! []LiAl2Al6(Si6O18)(BO3)3(OH)4 R 3m 3m
 
VIII/E.19-10 Elbaite Na(Li,Al)3Al6(BO3)3Si6O18(OH)4 R 3m 3m
 
VIII/E.19-15 Magnesiofoitite! [](Mg2Al)Al6(Si6O18)(BO3)3(OH)4 R 3m 3m
 
VIII/E.19-20 Dravite NaMg3Al6(BO3)3Si6O18(OH)4 R 3m 3m
 
VIII/E.19-30 Chromdravite! NaMg3(Cr,Fe)6(BO3)3Si6O18(OH)4 R 3m 3m
 
VIII/E.19-35 Vanadiumdravite! NaMg3V6(Si6O18)(BO3)3(OH)4 R 3m 3m
 
VIII/E.19-50 Schorl NaFe3Al6(BO3)3Si6O18(OH)4 R 3m 3m
 
VIII/E.19-55 Foitite! []Na<0.5(Fe,Al)3Al6Si6O18(BO3)3(OH)4 R 3m 3m
 
VIII/E.19-60 Olenite! NaAl3Al6(BO3)3(Si6O18)(O,OH)4 R 3m 3m
 
VIII/E.19-70 Buergerite! NaFe3Al6(BO3)3Si6O21F R 3m 3m
 
VIII/E.19-75 Povondraite! (Na,K)(Fe,Fe)3(Fe,Mg,Al)6(BO3)3Si6O18(OH)4 R 3m 3m
 
VIII/E.19-80 Liddicoatite Ca(Li,Al)3Al6(BO3)3Si6O18(O,OH,F)4 R 3m 3m
 
VIII/E.19-90 Uvite (Ca,Na)(Mg,Fe)3Al5Mg(BO3)3Si6O18(OH,F)4 R 3m 3m
 
VIII/E.19-100 Feruvite! (Ca,Na)(Fe,Mg,Ti)3(Al,Mg,Fe)6(BO3)3Si6O18(OH)4 R 3m 3m
 

Other Liddicoatite Information
Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(AntBidBlaNic2) OPTIC PROP.(AntBidBlaNic2)
Help on See Also: See Also: Links to other databases for Liddicoatite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (MinSocAm) 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 - Mineral and Gemstone Kingdom 12 -Mineralienatlas (Deutsch) 13 -QUT Mineral Atlas 14 - WWW-MINCRYST 15 -École des Mines de Paris

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Liddicoatite

Ca(Li,Al)3Al6(BO3)3Si6O18(O,OH,F)4
Dana No: 61.3b.1.2 Strunz No: VIII/E.19-80
Locality:

 

Notes:

 
 
   
 
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