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Noelbensonite Mineral Data

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General Noelbensonite Information

Help on Chemical  Formula: Chemical Formula: BaMn+++2(Si2O7)(OH)2•(H2O)
Help on Composition: Composition: Molecular Weight = 467.40 gm
   Barium     29.38 %  Ba   32.80 % BaO
   Manganese  23.51 %  Mn   33.78 % Mn2O3
   Silicon    12.02 %  Si   25.71 % SiO2
   Hydrogen    0.86 %  H     7.71 % H2O
   Oxygen     34.23 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: BaMn3+2(Si2O7)(OH)2•(H2O)
Help on Environment: Environment: As a replacement of NaMn amphibole nemansilite and serandite and as the main or sole constituent of tiny veinlets.
Help on IMA Status: IMA Status: Approved IMA 1996 (Dana # Added)
Help on Locality: Locality: The Woods mine 30 km NNE of Tamworth, New South Wales, Australia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For William Noel Benson (1855-1957), of the University of Otago, in recognition of his pioneering research in the Great Serpentine Belt and New England Fold Belt of New South Wales, Australia.
Help on Name Pronunciation: Name Pronunciation: Noelbensonite + Pronunciation Say NOELBENSONITE
Help on Synonym: Synonym: IMA1994-058
 

Noelbensonite Image

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  Noelbensonite

Comments: Brownish, massive noÊlbensonite.
Location: Woods Mine (Wood's Rhodonite Mine), Tamworth, New South Wales, Australia. Scale: Picture size 1.2 mm.
© Thomas Witzke / Abraxas-Verlag

Noelbensonite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.6935:1:1.4932
Help on Cell Dimensions: Cell Dimensions: a = 6.325, b = 9.12, c = 13.618, Z = 4; V = 785.54 Den(Calc)= 3.95
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: C mcm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 4.84(1), 2.729(0.82), 2.869(0.8),
 

Physical Properties of Noelbensonite

Help on Cleavage: Cleavage: None
Help on Color: Color: Dark brown.
Help on Density: Density: 3.87
Help on Diaphaneity: Diaphaneity: Translucent to transparent
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Blocky - Crystal shape tends to be equant (e.g. feldspars).
Help on Habit: Habit: Cryptocrystalline - Occurs as crystals too small to distinguish with the naked eye.
Help on Habit: Habit: Crystalline - Fine - Occurs as well-formed fine sized crystals.
Help on Hardness: Hardness: 4 - Fluorite
Help on Luster: Luster: Vitreous - Greasy
Help on Streak: Streak: yellow brown
 

Optical Properties of Noelbensonite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.03 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.05 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2122,KPDmeas= 0.2166,KC= 0.2233
Ncalc = 1.86 - 1.88
Help on Optical Data: Optical Data: Biaxial (-), a=1.82, b=1.845, g=1.85, bire=0.0300, 2V(Calc)=46, 2V(Meas)=46. Dispersion distinct to strong, r > v.
 

Calculated Properties of Noelbensonite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.61 gm/cc
note: Specific Gravity of Noelbensonite =3.87 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.05
Boson Index = 0.95
Help on Photoelectric: Photoelectric: PENoelbensonite = 133.00 barns/electron
U=PENoelbensonite x rElectron Density= 480.13 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Noelbensonite is Not Radioactive
 

Noelbensonite Classification

Help on  Dana Class: Dana Class: 56.02.03.04 (56)Sorosilicate Si2O7 Groups and O, OH, F. and H2O
  (56.02)with cations in [4] and/or >[4] coordination
  (56.02.03)Lawsonite - Ilvaite group
 
56.02.03.01 Lawsonite CaAl2Si2O7(OH)2•(H2O) Ccmm 2/m 2/m 2/m
 
56.02.03.02 Hennomartinite SrMn2Si2O7(OH)2•(H2O) C mcm 2/m 2/m 2/m
 
56.02.03.03 Ilvaite CaFe2FeSi2O7O(OH) Pbnm 2/m 2/m 2/m
 
56.02.03.04 Noelbensonite! BaMn2(Si2O7)(OH)2•(H2O) C mcm 2/m 2/m 2/m
 
56.02.03.05 Itoigawaite! SrAl2Si2O7(OH)2•(H2O) C mcm 2/m 2/m 2/m
 
56.02.03.06 Manganilvaite! CaFeFe(Mn,Fe)(Si2O7)O(OH) P 21/a 2/m
Help on  Strunz Class: Strunz Class: 09.BE.05 09 - SILICATES (Germanates)
  09.B - Sorosilicates
  09.BE -Si2O7 groups with additional anions;
 
09.BE.05 Hennomartinite SrMn2Si2O7(OH)2•(H2O) C mcm 2/m 2/m 2/m
 
09.BE.05 Lawsonite CaAl2Si2O7(OH)2•(H2O) Ccmm 2/m 2/m 2/m
 
09.BE.05 Noelbensonite! BaMn2(Si2O7)(OH)2•(H2O) C mcm 2/m 2/m 2/m
 
09.BE.05 Itoigawaite! SrAl2Si2O7(OH)2•(H2O) C mcm 2/m 2/m 2/m
 

Other Noelbensonite Information

Help on References: References: NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.81,p1514,1996) OPTIC PROP.(MinRec)
Help on See Also: See Also: Links to other databases for Noelbensonite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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

Noelbensonite

BaMn+++2(Si2O7)(OH)2•(H2O)
Dana No: 56.02.03.04 Strunz No: 09.BE.05
Locality:

 

Notes:

 

 
   
 


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