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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Carlosturanite

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 - DomaticH-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 Diaphaniety: Diaphaniety: 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
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:

relectron=2.64 gm/cc
note: rCarlosturanite =2.63 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.03814
Boson Index = 0.96186
Help on Photoelectric: Photoelectric:

PECarlosturanite = 2.78 barns/electron
U=PECarlosturanite x relectron= 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: 67.1.2.1 (67)Inosilicate Unbranched Chains with W>2
  (67.1)with W=3
  (67.1.2)Dana Group
 
67.1.2.1 Carlosturanite (Mg,Fe,Ti,Mn)21(Si,Al)12O28(OH)34 Cm m
Help on  Strunz Class: Strunz Class: VIII/H.27-190 VIII - Silicates
  VIII/H - Phyllosilicates (layered) Mica like with [Si4O10]4- and related groups
  VIII/H.27 - Serpentine group
 
VIII/H.27-10 Antigorite (Mg,Fe)3Si2O5(OH)4 Cm m
 
VIII/H.27-20 Lizardite Mg3Si2O5(OH)4 P1 1
 
VIII/H.27-30 Clinochrysotile Mg3Si2O5(OH)4 Cc, C 2/m Mono
 
VIII/H.27-40 Orthochrysotile Mg3Si2O5(OH)4 Unk Ortho
 
VIII/H.27-50 Parachrysotile Mg3Si2O5(OH)4 Unk Ortho
 
VIII/H.27-55 Caryopilite (Mn,Mg,Zn,Fe)3(Si,As)2O510(OH,Cl)4 Cm or C 2/m Mono
 
VIII/H.27-60 Greenalite (Fe,Fe)2-3Si2O5(OH)4 Unk Mono
 
VIII/H.27-70 Berthierine (Fe,Fe,Al,Mg)2-3(Si,Al)2O5(OH)4 Cm m
 
VIII/H.27-80 Fraipontite (Zn,Al)3(Si,Al)2O5(OH)4 Cm m
 
VIII/H.27-90 Zinalsite Zn2AlSi2O5(OH)4·2(H2O)(?) Mono
 
VIII/H.27-95 Dozyite (Mg7Al2)(Si4Al2)O15(OH)12 Cm m
 
VIII/H.27-100 Amesite Mg2Al(SiAl)O5(OH)4 C1 1
 
VIII/H.27-110 Kellyite (Mn,Mg,Al)3(Si,Al)2O5(OH)4 P 63 6
 
VIII/H.27-120 Cronstedtite Fe2Fe(SiFe)O5(OH)4 P 31m 3m
 
VIII/H.27-140 Karpinskite (Mg,Ni)2Si2O5(OH)2(?) Unk Mono
 
VIII/H.27-150 Nepouite Ni3Si2O5(OH)4 Ccm21 mm2
 
VIII/H.27-160 Pecoraite Ni3Si2O5(OH)4 C 2/m 2/m
 
VIII/H.27-170 Brindleyite (Ni,Mg,Fe)2Al(SiAl)O5(OH)4 C 2 2
 
VIII/H.27-180 Maufite (Mg,Ni)Al4Si3O13·4(H2O)(?) Mono ? Mono
 
VIII/H.27-190 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 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (MinSocAm) 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 -École des Mines de Paris

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Carlosturanite

(Mg,Fe++,Ti,Mn)21(Si,Al)12O28(OH)34
Dana No: 67.1.2.1 Strunz No: VIII/H.27-190
Locality:

 

Notes:

 

 
   
 
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