Nobleite Mineral Data

Nobleite Mineral Data
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General Nobleite Information

Help on Chemical Formula: Chemical Formula: CaB6O9(OH)2•3(H2O)
Help on Composition: Composition: Molecular Weight = 336.99 gm
   Calcium   11.89 %  Ca   16.64 % CaO
   Boron     19.25 %  B    61.98 % B2O3
   Hydrogen   2.39 %  H    21.38 % H2O
   Oxygen    66.47 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CaB6O9(OH)2•3(H2O)
Help on IMA Status: IMA Status: Approved IMA 1961
Help on Locality: Locality: Corkscrew mine, Corkscrew Canyon, Death Valley, Inyo Co. California, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Levi F. Noble ( ), Geologist, USGS for his contributions to the geology of the Death Valley region.
Help on Name Pronunciation: Name Pronunciation: Nobleite Say NOBLEITE
 

Nobleite Image

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

Comments: Platy nobleite microcrystals on colemanite.
Location: Corkscrew Mine, Corkscrew Canyon, Death Valley, Inyo County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Nobleite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =1.8163:1:1.2272
Help on Cell Dimensions: Cell Dimensions: a = 14.56, b = 8.016, c = 9.838, Z = 4; beta = 111.8° V = 1,066.11 Den(Calc)= 2.10
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/a
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 6.79(1), 3.39(0.31), 5.18(0.09),
Click Here for Large Nobleite Structure Window Crystal Structure:

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Karanovic L , Rosic A , Poleti D , European Journal of Mineralogy , 16 (2004) p.825-833, Crystal structure of nobleite, Ca[B6O9(OH)2]*3H2O, from Jarandol (Serbia), Note: Ca analogue of tunellite, Locality: Kopaonik Mt, central Serbia

 

Physical Properties of Nobleite

Help on Cleavage: Cleavage: {100} Perfect, {001} Indistinct
Help on Color: Color: Colorless, White.
Help on Density: Density: 2.09
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Flexible - Flexible fragments.
Help on Hardness: Hardness: 3 - Calcite
Help on Luster: Luster: Vitreous - Pearly
Help on Streak: Streak: white
 

Optical Properties of Nobleite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.042 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.037 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2498,KPDmeas= 0.251,KC= 0.2409
Ncalc = 1.5 - 1.51
Help on Optical Data: Optical Data: Biaxial (+), a=1.5, b=1.52, g=1.554, bire=0.0540, 2V(Calc)=78, 2V(Meas)=76.
 

Calculated Properties of Nobleite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.12 gm/cc
note: Specific Gravity of Nobleite =2.10 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PENobleite = 1.73 barns/electron
U=PENobleite x rElectron Density= 3.66 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Nobleite is Not Radioactive
 

Nobleite Classification
Help on Dana Class: Dana Class: 26.06.06.01 (26)Hydrated Borates Containing Hydroxyl or Halogen
  (26.06)Dana Type
  (26.06.06)Dana Group
 
26.06.06.01 Nobleite CaB6O9(OH)2•3(H2O) P 21/a 2/m
 
26.06.06.02 Tunellite SrB6O9(OH)2•3(H2O) P 21/a 2/m
Help on Strunz Class: Strunz Class: 06.FC.05 06 - BORATES
  06.F - Hexaborates
  06.FC -Phyllo-hexaborates
 
06.FC.05 Balavinskite? Sr2B6O11•4(H2O) Mono ? Mono
 
06.FC.05 Nobleite CaB6O9(OH)2•3(H2O) P 21/a 2/m
 
06.FC.05 Tunellite SrB6O9(OH)2•3(H2O) P 21/a 2/m
 

Other Nobleite Information
Help on References: References: NAME( MinRec) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Nobleite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info
14 - WWW-MINCRYST

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Ask about Nobleite 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 Nobleite Specimen Label here :

Nobleite

CaB6O9(OH)2•3(H2O)
Dana No: 26.06.06.01 Strunz No: 06.FC.05
Locality:

 

Notes: