Surkhobite Mineral Data

Surkhobite Mineral Data
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General Surkhobite Information

Help on Chemical Formula: Chemical Formula: KBa3Ca2Na2(Mn, Fe++,Fe+++)16Ti8(Si2O7)8O8(OH)4 (F,O,OH)8
Help on Composition: Composition: Molecular Weight = 3,523.22 gm
   Potassium   1.56 %  K     1.88 % K2O
   Barium     10.06 %  Ba   11.23 % BaO
   Sodium      1.70 %  Na    2.29 % Na2O
   Strontium   0.22 %  Sr    0.26 % SrO
   Calcium     1.82 %  Ca    2.55 % CaO
   Magnesium   0.08 %  Mg    0.13 % MgO
   Zirconium   0.26 %  Zr    0.35 % ZrO2
   Titanium    9.74 %  Ti   16.26 % TiO2
   Manganese  12.74 %  Mn   16.45 % MnO
   Niobium     1.50 %  Nb    2.15 % Nb2O5
   Aluminum    0.01 %  Al    0.01 % Al2O3
   Iron       12.40 %  Fe   14.03 % FeO /  2.13 % Fe2O3
   Silicon    12.80 %  Si   27.39 % SiO2
   Hydrogen    0.13 %  H     1.18 % H2O
   Oxygen     32.02 %  O
   Fluorine    2.96 %  F     2.96 % F
                -   %   F    -1.25 % -O=F2    
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na2.6K1.41Ca1.6Sr0.09Ba2.58Mn2+8.17Fe2+6.88Fe3+0.94Mg0.11Al0.01Ti7.17Nb0.57Zr0.1 Si16.06H4.61F5.49O70.51
Help on Environment: Environment: Rare-metal syenite pegmatite. Discredited because surkhobite (2003) is considered to be junshajiangite (1981). Redefined with new formula 2008.
Help on IMA Status: IMA Status: Redifined IMA 2008, Discredited IMA 2007, 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
  IMA2007-06-E - Surkhobite Discredited
  IMA2008-07-A - Surkhobite Redifined
 

Surkhobite Image

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

Comments: Small grain of reddish surkhobite.
Location: Dara-i-Pioz Glacier, Altai Range, Tajikistan. Scale: Graph Size 1 mm.
© Sergey Vasiliev / Systematic Mineralogy

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 = 2; beta = 95.09° V = 3,073.83 Den(Calc)= 3.81
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),
Click Here for Large Surkhobite Structure Window Crystal Structure:

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Rastsvetaeva R K , Eskova E M , Dusmatov V D , Chukanov N V , Schneider F , European Journal of Mineralogy , 20 (2008) p.289-295, Surkhobite: revalidation and redefinition with the new formula,, (Ba,K)2CaNa(Mn,Fe2+,Fe3+)8Ti4(Si2O7)4O4(F,OH,O)6, Locality: massif Darai-Pioz, Tajikistan

 

Physical Properties of Surkhobite

Help on Cleavage: Cleavage: {001} Perfect
Help on Color: Color: Brownish red.
Help on Density: Density: 3.84
Help on Diaphaneity: Diaphaneity: 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 Hardness: Hardness: 4.5 - Between Fluorite and Apatite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Surkhobite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.029 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.021 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2219,KPDmeas= 0.2201,KC= 0.2267
Ncalc = 1.86 - 1.87
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: Bulk Density (Electron Density)=3.62 gm/cc
note: Specific Gravity of Surkhobite =3.81 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PESurkhobite = 54.99 barns/electron
U=PESurkhobite x relectron= 198.90 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 21.43 (Gamma Ray American Petroleum Institute Units)
Concentration of Surkhobite per GRapi unit = 4.67 (%)

Estimated Radioactivity from Surkhobite - barely detectable

 

Surkhobite Classification
Help on Dana Class: Dana Class: 56.02.06b.04 (56)Sorosilicate Si2O7 Groups and O, OH, F. and H2O
  (56.02)with cations in [4] and/or >[4] coordination
  (56.02.06b)Seidozerite - Lamprophyllite group (Bafertisite subgroup)
 
56.02.06b.01 Bafertisite Ba(Fe,Mn)2TiSi2O7(O,OH)2 Cm m
 
56.02.06b.02 Hejtmanite Ba(Mn,Fe)2TiO(Si2O7)(OH,F)2 P 21/m 2/m
 
56.02.06b.03 Nafertisite! Na3(Fe,Fe)6(Ti2Si12O34)(O,OH)7•2(H2O) A2/m 2/m
 
56.02.06b.04 Surkhobite! KBa3Ca2Na2(Mn,Fe,Fe)16Ti8(Si2O7)8O8(OH)4(F,O,OH)8 C 2 2
 
56.02.06b.05 Nechelyustovite! (Ba,Na)2{(Na,Ti,Mn)4[(Ti,Nb)2O2Si4O14](OH,O,F)2}•4.5H2O P 2/m 2/m
 
56.02.06b.06 Caryochroite! (Na,Sr)3(Fe,Mg)10[Ti2Si12O37](O,OH)9•8H2O P 2/n (?) 2/m
Help on Strunz Class: Strunz Class: 09.BE.67 09 - SILICATES (Germanates)
  09.B - Sorosilicates
  09.BE -Si2O7 groups with additional anions;
 
09.BE.67 Jinshajiangite Na2K5BaCa(Fe,Mn)8(Ti,Fe,Nb,Zr)4Si8O32(O,F,H2O)6 C 2/m,Cm,C 2 Mono
 
09.BE.67 Perraultite (Na,Ca)2(Ba,K)2(Mn,Fe)8(Ti,Nb)4Si8O32(OH,F,O)6 C 2 2
 
09.BE.67 Surkhobite KBa3Ca2Na2(Mn,Fe,Fe)16Ti8(Si2O7)8O8(OH)4(F,O,OH)8 C 2 2
 

Other Surkhobite Information
Help on References: References: NAME( AmMin, v 89, p 469) PHYS. PROP.(AmMin, v89:469 and v93:1944) 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 - 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 Surkhobite Specimen Label here :

Surkhobite

KBa3Ca2Na2(Mn, Fe++,Fe+++)16Ti8(Si2O7)8O8(OH)4 (F,O,OH)8
Dana No: 56.02.06b.04 Strunz No: 09.BE.67
Locality:

 

Notes: