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Bostwickite Mineral Data
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General Bostwickite Information
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 Chemical Formula: |
CaMn+++6Si3O16•7(H2O) |
| Composition: |
Molecular Weight = 781.12 gm |
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Calcium 5.13 % Ca 7.18 % CaO |
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Manganese 35.17 % Mn 50.53 % Mn2O3 |
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Silicon 10.79 % Si 23.08 % SiO2 |
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Hydrogen 1.81 % H 16.14 % H2O |
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Oxygen 47.11 % O |
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______ ______ |
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100.00 % 96.93 % = TOTAL OXIDE |
| Empirical Formula: |
CaMn3+5Si3O16•7(H2O) |
| IMA Status: |
Approved IMA 1982 |
| Locality: |
Franklin and Sterling Hill, New Jersey, USA. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Richard C. Bostwick (1943-), collector and compiler of data on Franklin and Sterling Hill, NJ mineralogy, particularly fluorescent species. |
| Name Pronunciation: |
Bostwickite + Pronunciation  |
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Bostwickite Crystallography
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| Crystal System: |
Orthorhombic Space Group: Unk |
| X Ray Diffraction: |
By Intensity(I/Io): 11.3(1), 2.567(0.4), 3.548(0.3), |
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Physical Properties of Bostwickite
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| Color: |
Dark red. |
| Density: |
2.93 |
| Habit: |
Divergent - Crystals radiate from a center without producing stellar forms. |
| Habit: |
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline). |
| Hardness: |
1 - Talc |
| Luster: |
Vitreous - Metallic |
| Streak: |
red |
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Optical Properties of Bostwickite
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| Gladstone-Dale: |
CI meas= 0 (Superior) - where the CI = (1-KPDmeas/KC)
KPDmeas= 0.27,KC= 0.2701
Ncalc = 1.79 |
| 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. |
| Pleochroism (x): |
red brown. |
| Pleochroism (y): |
red brown. |
| Pleochroism (z): |
yellow brown. |
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Calculated Properties of Bostwickite
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| Electron Density: |
Bulk Density (Electron Density)=2.89 gm/cc
note: Specific Gravity of Bostwickite =2.93 gm/cc.
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| Fermion Index: |
Fermion Index = 0.0053354448
Boson Index = 0.9946645552 |
| Photoelectric: |
PEBostwickite = 9.95 barns/electron
U=PEBostwickite x rElectron Density= 28.75 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Bostwickite is Not Radioactive |
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Bostwickite Classification
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| Dana Class: |
78.07.01.01 (78)Unclassified silicates |
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(78.07)wholly unclassified silicates |
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(78.07.01)Dana Group |
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78.07.01.01 Bostwickite CaMn6Si3O16•7(H2O) Unk Ortho |
| Strunz Class: |
09.HC.10 09 - SILICATES (Germanates) |
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09.H - Unclassified Silicates |
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09.HC -With Mn, Fe |
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09.HC.10 Bostwickite CaMn6Si3O16•7(H2O) Unk Ortho |
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Other Bostwickite Information
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| References: |
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8) |
| 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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Print or Cut-and-Paste your Bostwickite Specimen Label here :
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Bostwickite
CaMn+++6Si3O16•7(H2O)
Dana No: 78.07.01.01 Strunz No: 09.HC.10
Locality:
Notes:
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