Hejtmanite Mineral Data

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General Hejtmanite Information

Chemical Formula:

Ba(Mn,Fe++)2TiO(Si2O7)(OH,F)2

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

Empirical Formula:

BaMn²⁺_1.5Fe²⁺_0.5TiO(Si₂O₇)(OH)_1.5F_0.5

Environment:

In arfvedsonite veins in pegmatite cutting alkalic granite and syenite.

IMA Status:

Approved IMA 1992

Locality:

On Mbolwe Hill, Mkushi River area, Central Province, Zambia. Link to MinDat.org Location Data.

Name Origin:

Named for Bohuslav Hejtman, Emeritus Professor of Petrology, Charles University, Prague, Czech Republic.

Name Pronunciation:

Hejtmanite + Pronunciation

Synonym:

ICSD 39402

IMA1989-038

PDF 44-1470

Hejtmanite Image

Images:

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

Axial Ratios:

a:b:c =0.8532:1:0.777

Cell Dimensions:

a = 11.748, b = 13.768, c = 10.698, Z = 8; beta = 112.27° V = 1,601.29 Den(Calc)= 4.27

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.726(1), 5.472(0.32), 3.455(0.17),

Physical Properties of Hejtmanite

Cleavage:

{???} Perfect

Color:

Golden yellow, Orange brown.

Density:

4.016

Diaphaneity:

Translucent

Hardness:

4.5 - Between Fluorite and Apatite

Luster:

Vitreous (Glassy)

Streak:

brown yellow

Optical Properties of Hejtmanite

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

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

Electron Density:

Bulk Density (Electron Density)=3.72 gm/cc
note: Specific Gravity of Hejtmanite =4.02 gm/cc.

Fermion Index:

Fermion Index = 0.06
Boson Index = 0.94

Photoelectric:

PE_Hejtmanite= 123.42 barns/electron
U=PE_Hejtmanite x rElectron Density= 459.34 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Hejtmanite is Not Radioactive

Hejtmanite Classification

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

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

References:

NAME( AntBidBlaNic2) PHYS. PROP.(37th List of New Min.,Min. Mag.,1996) OPTIC PROP.(37th List of New Min.,Min. Mag.,19)

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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Ask about Hejtmanite here :
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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: