Tegengrenite Mineral Data

Tegengrenite Mineral Data

General Tegengrenite Information

Chemical Formula:

(Mg,Mn++)2Sb+++++0.5(Mn+++,Si,Ti)0.5O4

Composition:

Molecular Weight = 219.12 gm

Magnesium 13.31 % Mg 22.07 % MgO

Titanium 0.87 % Ti 1.46 % TiO₂

Manganese 25.07 % Mn 25.90 % MnO / 7.21 % Mn₂O₃

Zinc 2.98 % Zn 3.71 % ZnO

Silicon 0.77 % Si 1.65 % SiO₂

Antimony 27.78 % Sb 36.91 % Sb₂O₅

Oxygen 29.21 % O

______ ______

100.00 % 98.90 % = TOTAL OXIDE

Empirical Formula:

Mg_1.2Mn²⁺_0.8Zn_0.1Sb_0.5Mn³⁺_0.2Si_0.06Ti_0.04O₄

Environment:

In a manganese-iron deposit in marble. Related to the spinal group

IMA Status:

Approved IMA 1999 (Dana # Added)

Locality:

Jokobsberg Fe-Mn deposit, Varmland, Sweden. Link to MinDat.org Location Data.

Name Origin:

Named for Felix Tegengren (1884-1980), a renowned Finlandic-Swedish economic geologist who wrote about the ore deposits of Sweden and China.

Synonym:

IMA1999-002

Tegengrenite Image

Images:

Tegengrenite

Comments: Red, pseudo-octahedral crystal of tegengrenite in quartz.
Location: Jakobsberg, Nordmark, Filipstad, V?rmland, Sweden. Scale: Picture size 0.8 mm.
© Thomas Witzke / Abraxas-Verlag

Tegengrenite Crystallography

Axial Ratios:

a:c = 1:0.92294

Cell Dimensions:

a = 16.196, c = 14.948, Z = 42; V = 3,395.70 Den(Calc)= 4.50

Crystal System:

TrigonalSpace Group: R 3 or R 3-

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

By Intensity(I/I_o): 2.608(1)(241,143,125), 3.052(0.33)(140,214), 1.6652(0.3)(363,075),1.5273(0.29)(428), 2.162(0.28)(244), 1.5313(0.26)(820), 4.98(0.2)(211,003),

Forms:

Mouse
Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize
Keyboard
S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu
Help on Above

Forms: [ 2 0 1] [ 0 0 1]

Warning: this large pop-up is very compute intensive and may not work well with some computers.

Physical Properties of Tegengrenite

Cleavage:

None

Color:

Dark red.

Diaphaniety:

Translucent

Fracture:

Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).

Habit:

Euhedral Crystals - Occurs as well-formed crystals showing good external form.

Habit:

Subhedral Crystals - Occurs as crystals which tend to exhibit a recognizable crystal shape.

Luster:

Subadamantine

Calculated Properties of Tegengrenite

Electron Density:

r_electron=4.17 gm/cc
note: r_Tegengrenite=4.50 gm/cc.

Fermion Index

Fermion Index = 0.01616
Boson Index = 0.98384

Photoelectric:

PE_Tegengrenite= 96.81 barns/electron
U=PE_Tegengrenite x r_electron= 404.06 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Tegengrenite is Not Radioactive

Tegengrenite Classification

Dana Class:

7.2.13.2 (7)Multiple Oxides

(7.2)(A+ B++)2 X4 Spinel group

(7.2.13)Dana Group

7.2.13.1 Filipstadite (Mn,Mg)4SbFeO8 pseudo ISO 2/m 2/m 2/m

7.2.13.2 Tegengrenite ! (Mg,Mn)2Sb0.5(Mn,Si,Ti)0.5O4 R 3 or R 3- Trig

Strunz Class:

IV/B.05-65 IV - Oxides

IV/B - Oxides with metal : oxygen = 3:4 (spinel type M3O4 and related)

IV/B.05 - Hausmannite - Filipstadite series

IV/B.05-10 Hausmannite MnMn2O4 I 4₁/amd 4/m 2/m 2/m

IV/B.05-20 Iwakiite Mn(Fe,Mn)2O4 P 4₁/nnm 4/m 2/m 2/m

IV/B.05-30 Donathite? (Fe,Mg)(Cr,Fe)2O4 P 4/nnm 4/m 2/m 2/m

IV/B.05-40 Hetaerolite ZnMn2O4 I 4₁/amd 4/m 2/m 2/m

IV/B.05-50 Hydrohetaerolite Zn2Mn4O8·(H2O) I 4₁/amd 4/m 2/m 2/m

IV/B.05-60 Marokite CaMn2O4 Pmab 2/m 2/m 2/m

IV/B.05-65 Tegengrenite (Mg,Mn)2Sb0.5(Mn,Si,Ti)0.5O4 R 3 or R 3- Trig

IV/B.05-80 Filipstadite (Mn,Mg)4SbFeO8 pseudo ISO 2/m 2/m 2/m

Other Tegengrenite Information

References:

NAME( MinRec, Vol 32, p 419) PHYS. PROP.(MinRec, Vol 32, p 419)

See Also:

Links to other databases for Tegengrenite :
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

Search for Tegengrenite using:

[ALTAVISTA] [AOL] [About.com] [All-The-Web] [HotBot] [Ixquick] [LookSmart] [MAMMA] [MSN.COM] [Netscape] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Tegengrenite :
AA Mineral Specimens
A-Rocks Auction
Adams Minerals
B and L Minerals
Dakota Matrix
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Minernet.it
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop

Translate Tegengrenite Mineral Data :

Ask about Tegengrenite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Tegengrenite Specimen Label here :

Tegengrenite

(Mg,Mn++)2Sb+++++0.5(Mn+++,Si,Ti)0.5O4
Dana No: 7.2.13.2 Strunz No: IV/B.05-65
Locality:

Notes: