Borocookeite Mineral Data


General Borocookeite Information

Help on Chemical  Formula: Chemical Formula: Li(1+3x)Al(4-x)(BSi3)O10(OH,F)8 [x = 0-0.33]
Help on Composition: Composition: Molecular Weight = 502.73 gm
   Lithium    2.21 %  Li    4.76 % Li2O
   Aluminum  20.39 %  Al   38.53 % Al2O3
   Silicon   16.76 %  Si   35.85 % SiO2
   Boron      1.29 %  B     4.15 % B2O3
   Hydrogen   1.56 %  H    13.98 % H2O
   Oxygen    56.65 %  O
   Fluorine   1.13 %  F     1.13 % F
               -   %  F    -0.48 % -O=F2
            ______        ______ 
            100.00 %       97.93 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Li1.6Al3.8B0.6Si3O10F0.3(OH)7.8
Help on Environment: Environment: Late stage pocket species in tourmaline-rich miarolitic pegmatites.
Help on IMA Status: IMA Status: Approved IMA 2003 (Dana # Added)
Help on Locality: Locality: Malkhan gem tourmaline deposit, Central Transbaikalia, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named as the boron-rich analog of cookeite.
Help on Synonym: Synonym: IMA2000-013
 

Borocookeite Image

Click Here for Larger Borocookeite Image in a New Browser Window Images:
Click Here for Larger Borocookeite Image

Borocookeite

Comments: Black and white image of multicolored tourmaline crystals (1) in fine-flaky aggregate of borocookeite (2). (AmMin, v 88, p 831).
Location: Sosedka and Mokhovaya pegmatite veins, Malkhan gem tourmaline deposit, Chikoy district, Chita oblast, Russia. Scale: Sample size is 5 x 5 cm.
© American Mineralogist

Borocookeite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.5782:1:1.589
Help on Cell Dimensions: Cell Dimensions: a = 5.121, b = 8.856, c = 14.073, Z = 2; beta = 96.93° V = 633.57 Den(Calc)= 2.64
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: pseudo C 2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.512(1)(004), 14.1(1)(001), 4.71(0.7)(003),7.05(0.5)(002), 2.807(0.2)(005), 1.946(0.17)(204), 2.304(0.16)(202), 2.332(0.14)(006), 1.62(0.1)(206),
 

Physical Properties of Borocookeite

Help on Cleavage: Cleavage: [001] Perfect
Help on Color: Color: Light pinkish gray.
Help on Density: Density: 2.62
Help on Diaphaniety: Diaphaniety: Opaque to translucent
Help on Fracture: Fracture: Flexible - Flexible fragments.
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Flakes - Flat, thin crystals or aggregates.
Help on Hardness: Hardness: 3 - Calcite
Help on Luster: Luster: Greasy (Oily)
Help on Streak: Streak: white
 

Optical Properties of Borocookeite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.017 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.017 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.222,KPDmeas= 0.222,KC= 0.2259
Help on Optical Data: Optical Data: Biaxial (?), a=1.574, b=1.58, g=1.591, bire=0.0170
 

Calculated Properties of Borocookeite

Help on Electron Density: Electron Density:

relectron=2.63 gm/cc
note: rBorocookeite =2.62 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.01232
Boson Index = 0.98768
Help on Photoelectric: Photoelectric:

PEBorocookeite = 1.32 barns/electron
U=PEBorocookeite x relectron= 3.46 barns/cc.

Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Borocookeite is Not Radioactive

 

Borocookeite Classification

Help on  Dana Class: Dana Class: 71.4.1.10 (71)Phyllosilicate Sheets of Six-Membered Rings
  (71.4)interlayered 1:1, 2:1, and octahedra
  (71.4.1)Chlorite group (Tri-Dioctahedral)
 
71.4.1.1 Donbassite Al2[Al2.33][Si3AlO10](OH)8 C 2/m 2/m
 
71.4.1.2 Cookeite LiAl4(Si3Al)O10(OH)8 P 21/a 2/m
 
71.4.1.3 Sudoite Mg2(Al,Fe)3Si3AlO10(OH)8 C 2/m 2/m
 
71.4.1.4 Clinochlore (Mg,Fe)5Al(Si3Al)O10(OH)8 C 2/m 2/m
 
71.4.1.5 Nimite (Ni,Mg,Fe)5Al(Si3Al)O10(OH)8 C 2/m 2/m
 
71.4.1.6 Baileychlore (Zn,Al,[])3[Fe2Al][Si3AlO10](OH)8 C1,C1 Tri
 
71.4.1.7 Chamosite (Fe,Mg,Fe)5Al(Si3Al)O10(OH,O)8 C 2/m 2/m
 
71.4.1.8 Pennantite Mn5Al(Si3Al)O10(OH)8 C 2/m 2/m
 
71.4.1.9 Orthochamosite! (Fe,Mg,Fe)5Al(Si3Al)O10(OH,O)8 C3m-pseudoHEX Ortho
 
71.4.1.10 Borocookeite ! Li(13x)Al(4-x)(BSi3)O10(OH,F)8[x=0-0.33] pseudo C 2/m 2/m
Help on  Strunz Class: Strunz Class: VIII/H.23-95 VIII - Silicates
  VIII/H - Phyllosilicates (layered) Mica like with [Si4O10]4- and related groups
  VIII/H.23 - Chlorite group
 
VIII/H.23-10 Sudoite Mg2(Al,Fe)3Si3AlO10(OH)8 C 2/m 2/m
 
VIII/H.23-20 Clinochlore (Mg,Fe)5Al(Si3Al)O10(OH)8 C 2/m 2/m
 
VIII/H.23-30 Chamosite (Fe,Mg,Fe)5Al(Si3Al)O10(OH,O)8 C 2/m 2/m
 
VIII/H.23-40 Orthochamosite (Fe,Mg,Fe)5Al(Si3Al)O10(OH,O)8 C3m-pseudoHEX Ortho
 
VIII/H.23-50 Baileychlore (Zn,Al,[])3[Fe2Al][Si3AlO10](OH)8 C1,C1 Tri
 
VIII/H.23-60 Pennantite Mn5Al(Si3Al)O10(OH)8 C 2/m 2/m
 
VIII/H.23-70 Nimite (Ni,Mg,Fe)5Al(Si3Al)O10(OH)8 C 2/m 2/m
 
VIII/H.23-80 Gonyerite Mn3[Mn3Fe][(Si,Fe)4O10](OH,O)8 pseudo-HEX Ortho
 
VIII/H.23-90 Cookeite LiAl4(Si3Al)O10(OH)8 P 21/a 2/m
 
VIII/H.23-95 Borocookeite Li(13x)Al(4-x)(BSi3)O10(OH,F)8[x=0-0.33] pseudo C 2/m 2/m
 
VIII/H.23-100 Manandonite Li2Al4[(Si2AlB)O10](OH)8 C1 1
 
VIII/H.23-110 Franklinfurnaceite Ca2(Fe,Al)MnMn3Zn2Si2O10(OH)8 C 2 2
 

Other Borocookeite Information

Help on References: References: NAME( AmMin, v 88, p 830) PHYS. PROP.(AmMin, v 88, p 830) OPTIC PROP.(AmMin, v 88, p 830)
Help on See Also: See Also: Links to other databases for Borocookeite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas

Search for Borocookeite using:

Google
 
Web webmineral.com
[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Borocookeite :

AA Mineral Specimens
B & L Fine Minerals
Crystal Vaults
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
Heliodor
John Betts Fine Minerals
Mason's Minerals
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Rockshop.cz
T G Fine Minerals
Wrights Rock Shop

Translate Borocookeite Mineral Data :

Ask about Borocookeite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Espaņol

Print or Cut-and-Paste your Borocookeite Specimen Label here :

Borocookeite

Li(1+3x)Al(4-x)(BSi3)O10(OH,F)8 [x = 0-0.33]
Dana No: 71.4.1.10 Strunz No: VIII/H.23-95
Locality:

 

Notes:

 

 
   
 
Go To Webmineral Home Crystallography X-Ray D-Spacing Table Chemical Composition
Dana Classification Strunz Classification Table of Mineral Properties Alphabetical Listing of Minerals
Search Webmineral Photo Gallery of Mineral Images Help Files Links