Martinite Mineral Data

Martinite Mineral Data

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General Martinite Information

Chemical Formula:

(Na,Ca)11Ca4(Si,S,B)14B2O40F2·4(H2O)

Composition:

Molecular Weight = 1,598.38 gm

Sodium 11.51 % Na 15.51 % Na₂O

Calcium 17.55 % Ca 24.56 % CaO

Silicon 19.33 % Si 41.35 % SiO₂

Boron 0.68 % B 2.18 % B₂O₃

Hydrogen 0.50 % H 4.51 % H₂O

Sulfur 4.01 % S 10.02 % SO₃

Oxygen 44.04 % O

Fluorine 2.38 % F 2.38 % F

- % F -1.00 % -O=F₂

______ ______

100.00 % 99.50 % = TOTAL OXIDE

Empirical Formula:

Na₈Ca₇Si₁₁S₂BO₄₀F₂·4(H₂O)

Environment:

(reyerite group; structure)

IMA Status:

Proposed IMA 2001 (Dana # Added)

Locality:

Link to MinDat.org Location Data.

Name Origin:

Commission on New Minerals and Mineral Names (CNMMN)

Synonym:

IMA2001-059

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Martinite Crystallography

Axial Ratios:

a:b:c =0.6803:1:0.6797

Cell Dimensions:

a = 9.5437, b = 14.0268, c = 9.5349, Z = 1; alpha = 71.057°, beta = 119.788°, gamma = 105.846° V = 1,007.95 Den(Calc)= 2.63

Crystal System:

Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1

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

By Intensity(I/I_o): 13.18(1), 6.58(0.43), 2.968(0.37),3.29(0.34), 2.908(0.27), 1.794(0.2),

Physical Properties of Martinite

Color:

Colorless, Purple.

Diaphaniety:

Transparent

Luster:

Vitreous (Glassy)

Optical Properties of Martinite

Gladstone-Dale:

CI calc= -0.003 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2065,KC= 0.2059

Optical Data:

Biaxial (-), a=1.529, b=1.549, g=1.551, bire=0.0220

Calculated Properties of Martinite

Electron Density:

r_electron=2.62 gm/cc
note: r_Martinite=2.63 gm/cc.

Fermion Index

Fermion Index = 0.01112
Boson Index = 0.98888

Photoelectric:

PE_Martinite= 3.35 barns/electron
U=PE_Martinite x r_electron= 8.79 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Martinite is Not Radioactive

Martinite Classification

Dana Class:

73.2.2d.1 (73)Phyllosilicate Condensed Tetrahedral Sheets

(73.2)with double and single layers

(73.2.2d)Reyerite group (Triclinic Subgroup)

73.2.2d.1 Martinite ! (Na,Ca)11Ca4(Si,S,B)14B2O40F2·4(H2O) P1 1

73.2.2d.2 Lalondeite! (Na,Ca)6(Ca,Na)3Si16O38(F,OH)2·3(H2O) P1 1

Strunz Class:

VIII/HX.00-00 VIII - Silicates

VIII/HX - Unclassified Strunz Phyllosilicates

VIII/HX.00 - Reyerite Group

Other Martinite Information

See Also:

Links to other databases for Martinite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas

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

Martinite

(Na,Ca)11Ca4(Si,S,B)14B2O40F2·4(H2O)
Dana No: 73.2.2d.1 Strunz No: VIII/HX.00-00
Locality:

Notes: