Surkhobite Mineral Data

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General Surkhobite Information

Help on Chemical  Formula: Chemical Formula: (Ca,Na)(Ba,K)(Fe++,Mn)4Ti2(Si4O14)O2(F,OH,O)3
Help on Composition: Composition: Molecular Weight = 902.39 gm
   Potassium   1.08 %  K     1.30 % K2O
   Barium     12.94 %  Ba   14.44 % BaO
   Sodium      1.17 %  Na    1.58 % Na2O
   Calcium     3.38 %  Ca    4.72 % CaO
   Zirconium   1.82 %  Zr    2.46 % ZrO2
   Titanium    8.38 %  Ti   13.99 % TiO2
   Manganese   9.86 %  Mn   12.73 % MnO
   Niobium     0.72 %  Nb    1.03 % Nb2O5
   Aluminum    0.57 %  Al    1.07 % Al2O3
   Iron       12.50 %  Fe   12.98 % FeO /  3.45 % Fe2O3
   Silicon    12.48 %  Si   26.70 % SiO2
   Hydrogen    0.13 %  H     1.17 % H2O
   Oxygen     30.90 %  O
   Fluorine    4.06 %  F     4.06 % F
                -   %  F    -1.71 % -O=F2
             ______        ______ 
             100.00 %       99.98 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca0.76Na0.46Ba0.85K0.25Fe2+1.63Mn2+1.62Fe3+0.39Al0.19Ti1.58Zr0.18Nb0.07Si4.01O14 O2.26F1.93(OH)1.17
Help on Environment: Environment: Rare-metal syenite pegmatite. Bafertisite series; structure determined
Help on IMA Status: IMA Status: Approved IMA 2003 (Dana # Added)
Help on Locality: Locality: Serkhob River Basin, Dara-i-Pioz massif, Central Tajikistan. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Synonym: Synonym: IMA2002-037
 

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Surkhobite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.7746:1:1.5034
Help on Cell Dimensions: Cell Dimensions: a = 10.719, b = 13.838, c = 20.805, Z = 8; beta = 95.09° V = 3,073.83 Den(Calc)= 3.90
Help on Crystal System: Crystal System: Monoclinic - SphenoidalH-M Symbol (2) Space Group: C 2
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.454(1)(006), 2.592(0.7)(008), 2.074(0.4)(048),10.39(0.2)(002), 1.728(0.15)(602,371,370)2.862(0.15)(225), 3.186(0.15),
 

Physical Properties of Surkhobite

Help on Cleavage: Cleavage: [001] Perfect
Help on Color: Color: Brownish red.
Help on Density: Density: 3.84
Help on Diaphaniety: Diaphaniety: Transparent to Translucent
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Euhedral Crystals - Occurs as well-formed crystals showing good external form.
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Surkhobite

Help on Optical Data: Optical Data: Biaxial (-), a=1.79, b=1.858, g=1.888, bire=0.0980, 2V(Calc)=64, 2V(Meas)=65. Dispersion r < v strong.
 

Calculated Properties of Surkhobite

Help on Electron Density: Electron Density:

relectron=3.69 gm/cc
note: rSurkhobite =3.90 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.0446
Boson Index = 0.9554
Help on Photoelectric: Photoelectric:

PESurkhobite = 67.25 barns/electron
U=PESurkhobite x relectron= 248.26 barns/cc.

Help on Radioactivity: Radioactivity:

GRapi = 14.78 (Gamma Ray American Petroleum Institute Units)

Estimated Radioactivity from Surkhobite - barely detectable

 

Surkhobite Classification

Help on  Dana Class: Dana Class: 56.2.6b.4 (56)Sorosilicate Si2O7 Groups and O, OH, F. and H2O
  (56.2)with cations in [4] and/or >[4] coordination
  (56.2.6b)Seidozerite - Lamprophyllite group (Bafertisite subgroup)
 
56.2.6b.1 Bafertisite Ba(Fe,Mn)2TiSi2O7(O,OH)2 Cm m
 
56.2.6b.2 Hejtmanite Ba(Mn,Fe)2TiO(Si2O7)(OH,F)2 P 21/m 2/m
 
56.2.6b.3 Nafertisite! Na3(Fe,Fe)6(Ti2Si12O34)(O,OH)7·2(H2O) A2/m 2/m
 
56.2.6b.4 Surkhobite ! (Ca,Na)(Ba,K)(Fe,Mn)4Ti2(Si4O14)O2(F,OH,O)3 C 2 2
Help on  Strunz Class: Strunz Class: VIII/CX.00-00 VIII - Silicates
  VIII/CX - Unclassified Strunz Sorosilicates
  VIII/CX.00 - Lamprophyllite Group
 

Other Surkhobite Information

Help on References: References: NAME( AmMin, v 89, p 469) PHYS. PROP.(AmMin, v 89, p 469) OPTIC PROP.(AmMin, v 89, p 469)
Help on See Also: See Also: Links to other databases for Surkhobite :
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 Surkhobite Specimen Label here :

Surkhobite

(Ca,Na)(Ba,K)(Fe++,Mn)4Ti2(Si4O14)O2(F,OH,O)3
Dana No: 56.2.6b.4 Strunz No: VIII/CX.00-00
Locality:

 

Notes:

 

 
   
 
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