Bostwickite Mineral Data

General Bostwickite Information

Chemical Formula:

CaMn+++6Si3O16•7(H2O)

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

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

Crystal System:

OrthorhombicSpace Group: Unk

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 11.3(1), 2.567(0.4), 3.548(0.3),

Physical Properties of Bostwickite

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

Optical Properties of Bostwickite

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.

Calculated Properties of Bostwickite

Electron Density:

Bulk Density (Electron Density)=2.89 gm/cc
note: Specific Gravity of Bostwickite =2.93 gm/cc.

Fermion Index:

Fermion Index = 0.0053354448
Boson Index = 0.9946645552

Photoelectric:

PE_Bostwickite= 9.95 barns/electron
U=PE_Bostwickite x rElectron Density= 28.75 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Bostwickite is Not Radioactive

Bostwickite Classification

Dana Class:

78.07.01.01 (78)Unclassified silicates

(78.07)wholly unclassified silicates

(78.07.01)Dana Group

78.07.01.01 Bostwickite CaMn6Si3O16•7(H2O) Unk Ortho

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

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 :

Bostwickite

CaMn+++6Si3O16•7(H2O)
Dana No: 78.07.01.01 Strunz No: 09.HC.10
Locality:

Notes: