Mineralogy Database

Bostwickite Mineral Data

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General Bostwickite Information

Help on Chemical  Formula: Chemical Formula: CaMn+++6Si3O16•7(H2O)
Help on Composition: Composition: Molecular Weight = 781.12 gm
   Calcium     5.13 %  Ca    7.18 % CaO
   Manganese  35.17 %  Mn   50.53 % Mn2O3
   Silicon    10.79 %  Si   23.08 % SiO2
   Hydrogen    1.81 %  H    16.14 % H2O
   Oxygen     47.11 %  O
             ______        ______ 
             100.00 %       96.93 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CaMn3+5Si3O16•7(H2O)
Help on IMA Status: IMA Status: Approved IMA 1982
Help on Locality: Locality: Franklin and Sterling Hill, New Jersey, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Richard C. Bostwick (1943-), collector and compiler of data on Franklin and Sterling Hill, NJ mineralogy, particularly fluorescent species.
Help on Name Pronunciation: Name Pronunciation: Bostwickite + Pronunciation Say BOSTWICKITE

Bostwickite Crystallography

Help on Crystal System: Crystal System: Orthorhombic Space Group: Unk
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 11.3(1), 2.567(0.4), 3.548(0.3),

Physical Properties of Bostwickite

Help on Color: Color: Dark red.
Help on Density: Density: 2.93
Help on Habit: Habit: Divergent - Crystals radiate from a center without producing stellar forms.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 1 - Talc
Help on Luster: Luster: Vitreous - Metallic
Help on Streak: Streak: red

Optical Properties of Bostwickite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0 (Superior) - where the CI = (1-KPDmeas/KC)
KPDmeas= 0.27,KC= 0.2701
Ncalc = 1.79
Help on Optical Data: Optical Data: Biaxial (-), a=1.775, b=1.798, g=1.8, bire=0.0250, 2V(Calc)=32, 2V(Meas)=25. Dispersion r < v strong.
Help on Pleochroism (x): Pleochroism (x): red brown.
Help on Pleochroism (y): Pleochroism (y): red brown.
Help on Pleochroism (z): Pleochroism (z): yellow brown.

Calculated Properties of Bostwickite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.89 gm/cc
note: Specific Gravity of Bostwickite =2.93 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0053354448
Boson Index = 0.9946645552
Help on Photoelectric: Photoelectric: PEBostwickite = 9.95 barns/electron
U=PEBostwickite x rElectron Density= 28.75 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Bostwickite is Not Radioactive

Bostwickite Classification

Help on  Dana Class: Dana Class: (78)Unclassified silicates
  (78.07)wholly unclassified silicates
  (78.07.01)Dana Group Bostwickite CaMn6Si3O16•7(H2O) Unk Ortho
Help on  Strunz Class: Strunz Class: 09.HC.10 09 - SILICATES (Germanates)
  09.H - Unclassified Silicates
  09.HC -With Mn, Fe
09.HC.10 Bostwickite CaMn6Si3O16•7(H2O) Unk Ortho

Other Bostwickite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Bostwickite :
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 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info

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Dana No: Strunz No: 09.HC.10





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