Mineralogy Database

Carlosturanite Mineral Data

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General Carlosturanite Information

Help on Chemical  Formula: Chemical Formula: (Mg,Fe++,Ti,Mn)21(Si,Al)12O28(OH)34
Help on Composition: Composition: Molecular Weight = 1,757.93 gm
   Magnesium  26.13 %  Mg   43.33 % MgO
   Titanium    1.91 %  Ti    3.18 % TiO2
   Manganese   0.63 %  Mn    0.81 % MnO
   Aluminum    0.77 %  Al    1.45 % Al2O3
   Iron        3.49 %  Fe    4.50 % FeO
   Silicon    18.37 %  Si   39.31 % SiO2
   Hydrogen    1.38 %  H    12.30 % H2O
   Oxygen     47.33 %  O
             ______        ______ 
             100.00 %      104.87 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mg18.9Fe2+1.1Ti0.7Mn2+0.2Si11.5Al0.5O28(OH)24
Help on Environment: Environment: In a network of veins crosscutting a metamorphic antigorite serpentinite, in an ophiolite.
Help on IMA Status: IMA Status: Approved IMA 1985
Help on Locality: Locality: In Italy, at a number of localities around Sampeyre and Calsteldelfino, Varaita Valley. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Prof. Carlo Sturani (1938-1976), University of Torino, Torino, Italy.

Carlosturanite Image

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Comments: White to tan fibrous coatings of carlosturanite on matrix.
Location: Val Varaita, Cuneo, Piemonte, Italy. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Carlosturanite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =3.9001:1:0.7748
Help on Cell Dimensions: Cell Dimensions: a = 36.7, b = 9.41, c = 7.291, Z = 2; beta = 101.1° V = 2,470.82 Den(Calc)= 2.36
Help on Crystal System: Crystal System: Monoclinic - Domatic H-M Symbol (m) Space Group: Cm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 7.17(1), 3.397(0.55), 3.595(0.45),2.562(0.4), 2.28(0.35), 18.02(0.25), 3.637(0.2),

Physical Properties of Carlosturanite

Help on Cleavage: Cleavage: {001} Perfect, {010} Parting
Help on Color: Color: Light brown.
Help on Density: Density: 2.63
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Flexible - Flexible fragments.
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luster: Luster: Vitreous - Pearly
Help on Streak: Streak: white

Optical Properties of Carlosturanite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.024 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.087 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2564,KPDmeas= 0.23,KC= 0.2358
Ncalc = 1.56 - 1.62
Help on Optical Data: Optical Data: Biaxial (?), b=1.605
Help on Pleochroism (x): Pleochroism (x): brown orange.
Help on Pleochroism (y): Pleochroism (y): brown orange.
Help on Pleochroism (z): Pleochroism (z): pale brown orange.

Calculated Properties of Carlosturanite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.64 gm/cc
note: Specific Gravity of Carlosturanite =2.63 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PECarlosturanite = 2.78 barns/electron
U=PECarlosturanite x rElectron Density= 7.36 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Carlosturanite is Not Radioactive

Carlosturanite Classification

Help on  Dana Class: Dana Class: (67)Inosilicate Unbranched Chains with W>2
  (67.01)with W=3
  (67.01.02)Dana Group Carlosturanite (Mg,Fe,Ti,Mn)21(Si,Al)12O28(OH)34 Cm m
Help on  Strunz Class: Strunz Class: 09.DJ.25 09 - SILICATES (Germanates)
  09.D - Inosilicates* Structural terminology according to Liebau (1985)
  09.DJ -Inosilicates with 4-periodic double and triple chains
09.DJ.25 Carlosturanite (Mg,Fe,Ti,Mn)21(Si,Al)12O28(OH)34 Cm m

Other Carlosturanite Information

Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic2)
Help on See Also: See Also: Links to other databases for Carlosturanite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Dana No: Strunz No: 09.DJ.25





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