Martinite Mineral Data

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General Martinite Information

Chemical Formula:

(Na,[ ],Ca)12Ca4(Si,S,B)14B2O38(OH,Cl)2F2•4(H2O)

Composition:

Molecular Weight = 1,589.21 gm

Sodium 13.29 % Na 17.92 % Na₂O

Calcium 12.08 % Ca 16.90 % CaO

Magnesium 0.02 % Mg 0.03 % MgO

Titanium 0.03 % Ti 0.05 % TiO₂

Manganese 0.07 % Mn 0.09 % MnO

Silicon 23.12 % Si 49.45 % SiO₂

Boron 2.58 % B 8.32 % B₂O₃

Hydrogen 0.61 % H 5.48 % H₂O

Sulfur 0.93 % S 2.32 % SO₃

Chlorine 1.12 % Cl 1.12 % Cl

- % Cl -0.25 % -O=Cl₂

Oxygen 43.95 % O

Fluorine 2.20 % F 2.20 % F

- % F -0.93 % -O=F₂

______ ______

100.00 % 102.69 % = TOTAL OXIDE

Empirical Formula:

Na_9.19Ca_0.82Ca_3.97Mn²⁺_0.02Mg_0.01Si_13.08S_0.464(B_0.45)Ti_0.01B₂O₃₈(OH)_1.5Cl_0.5F_1.84(OH)_0.16·4(H₂O)

Environment:

Formed through the interaction of highly fractionated, hyperagpaitic fluids with sodalite syenite xenoliths. (reyerite group; structure)

IMA Status:

Approved IMA 2001 (Dana # Added)

Locality:

Poudrette quarry, Mont Saint-Hilaire, Quebec, Canada. Link to MinDat.org Location Data.

Name Origin:

Name for Robert François Martin (b. 1941), Professor of Geology at McGill University and long-time editor of The Canadian Mineralogist.

Synonym:

IMA2001-059

Martinite Image

Images:

Martinite

Comments: Colorless, pseudohexagonal plate of martinite associated with sodalite and a clinoamphibole. (CanMin, v45:1281).
Location: Poudrette quarry, Mont Saint-Hilaire, Quebec, Canada. Scale: Crystal size 40 µm.
© Canadian Mineralogist

Martinite Crystallography

Axial Ratios:

a:b:c =1.0009:1:1.4711

Cell Dimensions:

a = 9.5437, b = 9.5349, c = 14.0268, Z = 1; alpha = 108.943°, beta = 74.154°, gamma = 119.78° V = 1,008.03 Den(Calc)= 2.62

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),

Crystal Structure:

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McDonald A M , Chao G Y , The Canadian Mineralogist , 45 (2007) p.1281-1292, Martinite, a new hydrated sodium calcium fluorborosilicate species from Mont, Saint-Hilaire, Quebec: description, structure determination and genetic implications, Note: changed F(y) to match reported bond distances, Locality: Poudrette quarry, Mont Saint-Hilaire, Rouville County, Quebec, Canada

Physical Properties of Martinite

Cleavage:

{001} Perfect

Color:

Colorless, Purple.

Diaphaneity:

Transparent

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Hardness:

4 - Fluorite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Martinite

Gladstone-Dale:

CI calc= 0.019 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2138,KC= 0.218
Ncalc = 1.55

Optical Data:

Biaxial (-), a=1.529, b=1.549, g=1.551, bire=0.0220, 2V(Calc)=34, 2V(Meas)=38. Dispersion dispersion not observed.

Calculated Properties of Martinite

Electron Density:

Bulk Density (Electron Density)=2.53 gm/cc
note: Specific Gravity of Martinite =2.54 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Martinite= 2.77 barns/electron
U=PE_Martinite x rElectron Density= 7.01 barns/cc.

Radioactivity:

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

Martinite Classification

Dana Class:

73.02.02d.01 (73)Phyllosilicate Condensed Tetrahedral Sheets

(73.02)with double and single layers

(73.02.02d)Reyerite group (Triclinic Subgroup)

73.02.02d.01 Martinite! (Na,[],Ca)12Ca4(Si,S,B)14B2O38(OH,Cl)2F2•4(H2O) P1 1

73.02.02d.02 Lalondeite! (Na,Ca)6(Ca,Na)3Si16O38(F,OH)2•3(H2O) P1 1

Strunz Class:

09.EE.80 09 - SILICATES (Germanates)

09.E - Phyllosilicates

09.EE -Single tetrahedral nets of 6-membered rings

09.EE.80 Fedorite KNa4Ca4(Al,Si)16O36(OH,F)4•6(H2O) C1 1

09.EE.80 Martinite! (Na,[],Ca)12Ca4(Si,S,B)14B2O38(OH,Cl)2F2•4(H2O) P1 1

Other Martinite Information

References:

NAME( CanMin, v45:1281) PHYS. PROP.(CanMin, v45:1281) OPTIC PROP.(CanMin, v45:1281)

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
10 - Ruff.Info

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

Martinite

(Na,[ ],Ca)12Ca4(Si,S,B)14B2O38(OH,Cl)2F2•4(H2O)
Dana No: 73.02.02d.01 Strunz No: 09.EE.80
Locality:

Notes: