Marianoite Mineral Data (original) (raw)

General Marianoite Information

Help on Chemical Formula: Chemical Formula:

Na2Ca4(Nb,Zr)2(Si2O7)2(O,F)4

Help on Composition: Composition:

Molecular Weight = 792.51 gm

Sodium 5.60 % Na 7.55 % Na2O

Calcium 20.21 % Ca 28.28 % CaO

Hafnium 0.14 % Hf 0.16 % HfO2

Magnesium 0.09 % Mg 0.14 % MgO

Zirconium 10.35 % Zr 13.98 % ZrO2

Tantalum 0.07 % Ta 0.08 % Ta2O5

Titanium 0.57 % Ti 0.95 % TiO2

Manganese 0.29 % Mn 0.38 % MnO

Niobium 11.34 % Nb 16.22 % Nb2O5

Iron 0.56 % Fe 0.73 % FeO

Silicon 14.05 % Si 30.06 % SiO2

Oxygen 34.17 % O

Fluorine 2.57 % F 2.57 % F

- % F -1.08 % -O=F2

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Help on Empirical Formula: Empirical Formula:

Na1.93Ca3.99Mn2+0.04Nb0.96Zr0.89Ti0.09Fe2+0.08Mg0.02Hf0.006Ta0.003Si3.96O14O2.92F1.07

Help on Environment: Environment:

Discovered in rock which consists of phlogopite, U-rich pyrochlore, titanite, and marianoite (which makes up approximately 1 vol% of the rock). Cuspidine group

Help on IMA Status: IMA Status:

Approved IMA 2005 (Dana # Added)

Help on Locality: Locality:

Prairie Lake, Thunder bay district, Ontario, Canada Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

Named for Anthony ("Tony") Nicola Mariano (b. 1930) in recognition for his contributions to the study of alkaline rocks and carbonatites.

Help on Synonym: Synonym:

IMA2005-005a

Marianoite Image

Click Here for Larger Marianoite Image in a New Browser Window Images:

Click Here for Larger Marianoite Image Marianoite Comments: PPL image of euhedral crystals of marianoite, titanite and U-rich pyrochlore in the phlogopite-calcite silicocarbonatite. (CanMin, v46:1023). Location: Mesoproterozoic Prairie Lake intrusive complex, in northwestern Ontario, Canada.Scale: See Image. © Canadian Mineralogist

Click Here for Larger Marianoite Image in a New Browser Window Images:

Click Here for Larger Marianoite Image Marianoite Comments: SEM images showing the morphology of marianoite crystals, (CanMin, v46:1023). Location: Mesoproterozoic Prairie Lake intrusive complex, in northwestern Ontario, Canada.Scale: See Images. © Canadian Mineralogist

Marianoite Crystallography

Help on Axial Ratios: Axial Ratios:

a:b:c =1.0605:1:0.7111

Help on Cell Dimensions: Cell Dimensions:

a = 10.845, b = 10.226, c = 7.272, Z = 2; beta = 109.33° V = 761.01 Den(Calc)= 3.46

Help on Crystal System: Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21

Help on X Ray Diffraction: X Ray Diffraction:

By Intensity(I/Io): 2.02(1), 2.85(1), 3.04(1),2.42(0.75), 2.48(0.75), 3.23(0.75), 3.64(0.75),

Physical Properties of Marianoite

Help on Cleavage: Cleavage:

{010} Distinct

Help on Color: Color:

Pale yellow.

Help on Density: Density:

3.32

Help on Diaphaneity: Diaphaneity:

Translucent

Help on Fracture: Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Help on Habit: Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Help on Hardness: Hardness:

6 - Orthoclase

Help on Luster: Luster:

Vitreous - Greasy

Optical Properties of Marianoite

Help on Gladstone-Dale: Gladstone-Dale:

CI meas= 0.009 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.049 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2062,KPDmeas= 0.2149,KC= 0.2168
Ncalc = 1.72 - 1.75

Help on Optical Data: Optical Data:

Biaxial (-), a=1.7, b=1.715, g=1.725, bire=0.0250, 2V(Calc)=76, 2V(Meas)=80. Dispersion weak, r < v.

Calculated Properties of Marianoite

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=3.21 gm/cc
note: Specific Gravity of Marianoite =3.32 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Help on Photoelectric: Photoelectric:

PEMarianoite = 35.94 barns/electron
U=PEMarianoite x rElectron Density= 115.48 barns/cc.

Help on Radioactivity: Radioactivity:

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

Marianoite Classification

Help on Dana Class: Dana Class:

56.02.04.18 (56)Sorosilicate Si2O7 Groups and O, OH, F. and H2O

(56.02)with cations in [4] and/or >[4] coordination

(56.02.04)Cuspidine - Wohlerite group

56.02.04.01 Baghdadite Ca3(Zr,Ti)Si2O9 P 21/a 2/m

56.02.04.02 Burpalite Na2CaZrSi2O7F2 P 21/a 2/m

56.02.04.03 Cuspidine Ca4Si2O7(F,OH)2 P 21/c 2/m

56.02.04.04 Lavenite (Na,Ca)2(Mn,Fe)(Zr,Ti,Nb)Si2O7(O,OH,F) P 21/a 2/m

56.02.04.05 Wohlerite NaCa2(Zr,Nb)Si2O7(O,OH,F)2 P 21/m 2/m

56.02.04.06 Niocalite Ca14Nb2(Si2O7)4O6F2 Pa m

56.02.04.07 Hiortdahlite (Ca,Na,Y)3(Zr,Ti)Si2O7(F,O,OH)2 P1 1

56.02.04.08 Rosenbuschite (Ca,Na)3(Zr,Ti)Si2O8F P1 1

56.02.04.09 Hainite Na4Ca8(Ti,Zr,Mn,Fe)3Si8O28F8 P1 1

56.02.04.10 Janhaugite (Na,Ca)3(Mn,Fe)3(Ti,Zr,Nb)2Si4O15(OH,F,O)3 P 21/n 2/m

56.02.04.11 Jennite Ca9Si6O18(OH)6•8H2O P1 1

56.02.04.12 Komarovite (Ca,Mn)2(Nb,Ti)2Si2O7(O,F)2•3.5(H2O) Unk Ortho

56.02.04.13 Natrokomarovite* Na6CaNb6[Si4O12F2•4(H2O) C mmm 2/m 2/m 2/m

56.02.04.14 Suolunite Ca2Si2O5(OH)2•(H2O) F dd2 mm2

56.02.04.15 Mongolite Ca4Nb6Si5O24(OH)10•5(H2O) Unk Tetra

56.02.04.16 Kristiansenite! Ca2ScSn(Si2O7)(Si2O6OH) C1 1

56.02.04.17 Kochite! Na2(Na,Ca)4Ca4(Mn,Ca)2Zr2Ti2(Si2O7)4(O,F)4F4 P1 1

56.02.04.18 Marianoite! Na2Ca4(Nb,Zr)2(Si2O7)2(O,F)4 P 21 2/m

Help on Strunz Class: Strunz Class:

09.BE.17 09 - SILICATES (Germanates)

09.B - Sorosilicates

09.BE -Si2O7 groups with additional anions;

09.BE.17 Baghdadite Ca3(Zr,Ti)Si2O9 P 21/a 2/m

09.BE.17 Janhaugite (Na,Ca)3(Mn,Fe)3(Ti,Zr,Nb)2Si4O15(OH,F,O)3 P 21/n 2/m

09.BE.17 Burpalite Na2CaZrSi2O7F2 P 21/a 2/m

09.BE.17 Cuspidine Ca4Si2O7(F,OH)2 P 21/c 2/m

09.BE.17 Hiortdahlite (Ca,Na,Y)3(Zr,Ti)Si2O7(F,O,OH)2 P1 1

09.BE.17 Lavenite (Na,Ca)2(Mn,Fe)(Zr,Ti,Nb)Si2O7(O,OH,F) P 21/a 2/m

09.BE.17 Niocalite Ca14Nb2(Si2O7)4O6F2 Pa m

09.BE.17 Normandite! NaCa(Mn,Fe)(Ti,Nb,Zr)Si2O7(O,F)2 P 21/a 2/m

09.BE.17 Wohlerite NaCa2(Zr,Nb)Si2O7(O,OH,F)2 P 21/m 2/m

09.BE.17 Marianoite! Na2Ca4(Nb,Zr)2(Si2O7)2(O,F)4 P 21 2/m

Other Marianoite Information

Help on References: References:

NAME( CanMin, v46:1023) PHYS. PROP.(CanMin, v46:1023) OPTIC PROP.(CanMin, v46:1023)

Help on See Also: See Also:

Links to other databases for Marianoite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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

Marianoite

Na2Ca4(Nb,Zr)2(Si2O7)2(O,F)4
Dana No: 56.02.04.18 Strunz No: 09.BE.17
Locality:

Notes: