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Hejtmanite Mineral Data

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General Hejtmanite Information

Help on Chemical  Formula: Chemical Formula: Ba(Mn,Fe++)2TiO(Si2O7)(OH,F)2
Help on Composition: Composition: Molecular Weight = 514.71 gm
   Barium     26.68 %  Ba   29.79 % BaO
   Titanium    9.30 %  Ti   15.52 % TiO2
   Manganese  16.01 %  Mn   20.67 % MnO
   Iron        5.43 %  Fe    6.98 % FeO
   Silicon    10.91 %  Si   23.35 % SiO2
   Hydrogen    0.29 %  H     2.63 % H2O
   Oxygen     29.53 %  O
   Fluorine    1.85 %  F     1.85 % F
                -   %   F    -0.78 % -O=F2    
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: BaMn2+1.5Fe2+0.5TiO(Si2O7)(OH)1.5F0.5
Help on Environment: Environment: In arfvedsonite veins in pegmatite cutting alkalic granite and syenite.
Help on IMA Status: IMA Status: Approved IMA 1992
Help on Locality: Locality: On Mbolwe Hill, Mkushi River area, Central Province, Zambia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Bohuslav Hejtman, Emeritus Professor of Petrology, Charles University, Prague, Czech Republic.
Help on Name Pronunciation: Name Pronunciation: Hejtmanite + Pronunciation Say HEJTMANITE
Help on Synonym: Synonym: ICSD 39402
  IMA1989-038
  PDF 44-1470
 

Hejtmanite Image

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  Hejtmanite

Comments: Bronze sub-metallic micaceous crystalline hejtmanite with dark green aegirine on white feldspar.
Location: Dara-Pioz, Tien-Shan, Tadzhikistan. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Hejtmanite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.8532:1:0.777
Help on Cell Dimensions: Cell Dimensions: a = 11.748, b = 13.768, c = 10.698, Z = 8; beta = 112.27° V = 1,601.29 Den(Calc)= 4.27
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.726(1), 5.472(0.32), 3.455(0.17),
 

Physical Properties of Hejtmanite

Help on Cleavage: Cleavage: {???} Perfect
Help on Color: Color: Golden yellow, Orange brown.
Help on Density: Density: 4.016
Help on Diaphaneity: Diaphaneity: Translucent
Help on Hardness: Hardness: 4.5 - Between Fluorite and Apatite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: brown yellow
 

Optical Properties of Hejtmanite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.007 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.066 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1973,KPDmeas= 0.2097,KC= 0.2113
Ncalc = 1.85 - 1.9
Help on Optical Data: Optical Data: Biaxial (-), a=1.814, b=1.846, g=1.867, bire=0.0530, 2V(Calc)=76, 2V(Meas)=76-76.8.
 

Calculated Properties of Hejtmanite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.72 gm/cc
note: Specific Gravity of Hejtmanite =4.02 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.06
Boson Index = 0.94
Help on Photoelectric: Photoelectric: PEHejtmanite = 123.42 barns/electron
U=PEHejtmanite x rElectron Density= 459.34 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Hejtmanite is Not Radioactive
 

Hejtmanite Classification

Help on  Dana Class: Dana Class: 56.02.06b.02 (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.55 09 - SILICATES (Germanates)
  09.B - Sorosilicates
  09.BE -Si2O7 groups with additional anions;
 
09.BE.55 Bafertisite Ba(Fe,Mn)2TiSi2O7(O,OH)2 Cm m
 
09.BE.55 Hejtmanite Ba(Mn,Fe)2TiO(Si2O7)(OH,F)2 P 21/m 2/m
 
09.BE.55 Nechelyustovite! (Ba,Na)2{(Na,Ti,Mn)4[(Ti,Nb)2O2Si4O14](OH,O,F)2}•4.5H2O P 2/m 2/m
 

Other Hejtmanite Information

Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(37th List of New Min.,Min. Mag.,1996) OPTIC PROP.(37th List of New Min.,Min. Mag.,19)
Help on See Also: See Also: Links to other databases for Hejtmanite :
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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Print or Cut-and-Paste your Hejtmanite Specimen Label here :

Hejtmanite

Ba(Mn,Fe++)2TiO(Si2O7)(OH,F)2
Dana No: 56.02.06b.02 Strunz No: 09.BE.55
Locality:

 

Notes:

 

 
   
 


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