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Trattnerite

A valid IMA mineral species
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02184710017272470868073.jpg
Trattnerite

Stradner Kogel, Wilhelmsdorf, Bad Gleichenberg, Südoststeiermark District, Styria, Austria
04348530017272470868637.jpg
Trattnerite

Caspar quarry, Ettringen, Vordereifel, Mayen-Koblenz, Rhineland-Palatinate, Germany
09016500017778737907435.jpg
Trattnerite

Stradner Kogel, Wilhelmsdorf, Bad Gleichenberg, Südoststeiermark District, Styria, Austria
07579680017866428551711.jpg
Trattnerite

Stradner Kogel, Wilhelmsdorf, Bad Gleichenberg, Südoststeiermark District, Styria, Austria
04348530017272470868637.jpg
Trattnerite

Caspar quarry, Ettringen, Vordereifel, Mayen-Koblenz, Rhineland-Palatinate, Germany
09291210017715323173290.jpg
Trattnerite

Stradner Kogel, Wilhelmsdorf, Bad Gleichenberg, Südoststeiermark District, Styria, Austria
02184710017272470868073.jpg
Trattnerite

Stradner Kogel, Wilhelmsdorf, Bad Gleichenberg, Südoststeiermark District, Styria, Austria
04348530017272470868637.jpg
Trattnerite

Caspar quarry, Ettringen, Vordereifel, Mayen-Koblenz, Rhineland-Palatinate, Germany
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About TrattneriteHide

02000280017272470877979.jpg
Walter Trattner
Formula:
◻(◻)2Fe3+2Mg3[Si12O30]
Previously given as □(Fe3+,Mg,Fe2+)2(Mg,Fe2+,Fe3+)3(Si12O30).
Colour:
Blue
Lustre:
Vitreous
Specific Gravity:
2.68 (Calculated)
Crystal System:
Hexagonal
Member of:
Osumilite Group
Name:
For mineral collector Walter Trattner, who found the specimen. Mr Trattner is a specialist on minerals in volcanic rocks of southeast Austria.
Osumilite Group.


Unique IdentifiersHide

Mindat ID:
26354
Long-form identifier:
mindat:1:1:26354:4

IMA Classification of TrattneriteHide

IMA status:
Approved
IMA Formula:
Fe3+2(Mg3Si12)O30
Approval year:
2002
First published:
2004

Classification of TrattneriteHide

Strunz-mindat (2026):
9.CM.05

9 : SILICATES (Germanates)
C : Cyclosilicates
M : [Si6O18]12- 6-membered double rings (sechser-Doppelringe)

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.

SymbolSourceReference for Standard
TraIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43
TraThe Canadian Mineralogist (2019)The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download

Physical Properties of TrattneriteHide

Lustre:
Vitreous
Transparency:
Translucent
Colour:
Blue
Streak:
White
Tenacity:
Brittle
Cleavage:
Distinct/Good
Parallel to (001) is good, poor parallel to (100).
Density:
2.68 g/cm3 (Calculated)

Optical Data of TrattneriteHide

Type:
Uniaxial (-)
RI values:
nω = 1.589(1) nε = 1.586(1)
Max. Birefringence:
δ = 0.003
Based on recorded range of RI values above.

Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.

Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.

Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.

Surface Relief:
Moderate (positive)
Relative to Canada balsam mounting medium (n ≈ 1.537).

This shows the grain boundary and Becke line effect under plane-polarised light, based on the contrast between this mineral's average refractive index and the mounting medium. It does not take into account mineral colouration.
In focus
Interference Figure:
This shows the idealized uniaxial interference figure - the conoscopic (convergent-light, Bertrand-lens-in) view, for a grain cut with the optic axis centred and vertical. The coloured rings are isochromatics, computed with the same physics as the Michel-Lévy bar above; the dark cross is the isogyre.

For a genuinely uniaxial mineral viewed this way, that cross stays perfectly stationary if you rotate the stage - unlike a biaxial mineral, where it splits apart on rotation. That invariance is itself the standard diagnostic test for telling uniaxial and biaxial minerals apart at the microscope.
Pleochroism:
Visible
Comments:
Deep blue ({omega}) to yellowish-green ({epsilon})

Chemistry of TrattneriteHide

Mindat Formula:
◻(◻)2Fe3+2Mg3[Si12O30]

Previously given as □(Fe3+,Mg,Fe2+)2(Mg,Fe2+,Fe3+)3(Si12O30).
Element Weights:
Element% weight
O47.921 %
Si33.648 %
Fe11.151 %
Mg7.280 %

Calculated from ideal end-member formula.
O
Si
Fe
Mg
Elements listed:
Fe, Mg, O, Si - search for minerals with similar chemistry

Crystallography of TrattneriteHide

Crystal System:
Hexagonal
Class (H-M):
6/mmm(6/m2/m2/m) - Dihexagonal Dipyramidal
Space Group:
P6/mcc
Cell Parameters:
a = 10.050(1) Å, c = 14.338(2) Å
Ratio:
a:c = 1 : 1.427
Unit Cell V:
1,254.16 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Hypidiomorphic, short prismatic to tabular crystals up to 1 mm.

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0007067TrattneritePostl W, Walter F, Ettinger K, Hauzenberger C, Bojar H P (2004) Trattnerite, (Fe,Mg)2(Mg,Fe)3[Si12O30], a new mineral of the milarite group: mineral data and crystal structure European Journal of Mineralogy 16 375-38020040293
0007066TrattneritePostl W, Walter F, Ettinger K, Hauzenberger C, Bojar H P (2004) Trattnerite, (Fe,Mg)2(Mg,Fe)3[Si12O30], a new mineral of the milarite group: mineral data and crystal structure European Journal of Mineralogy 16 375-38020040293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
8.7 Å(97)
7.17 Å(100)
5.535 Å(96)
5.026 Å(61)
4.352 Å(53)
3.207 Å(85)
2.767 Å(38)
Comments:
Stradner Kogel quarry, AUstria. Data from the type description.

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
High-? alteration and/or metamorphism
31 : Thermally altered carbonate, phosphate, and iron formations
Stage 4b: Highly evolved igneous rocks>3.0
35 : Ultra-alkali and agpaitic igneous rocks

Type Occurrence of TrattneriteHide

Type Locality:
ⓘ Stradner Kogel, Wilhelmsdorf, Bad Gleichenberg, Südoststeiermark District, Styria, Austria
General Appearance of Type Material:
Deep blue to yellowish green, subhedral to euhedral crystals. Typically short prismatic to tabular; rarely long prismatic to 1 mm.
Place of Conservation of Type Material:
Landesmuseum Joanneum Graz and in the Natural History Museum Vienna, Austria.
Geological Setting of Type Material:
Xenolith in nepheline syenite.
Associated Minerals at Type Locality:
HematiteOrthopyroxene SubgroupQuartzSanidineTridymite

Synonyms of TrattneriteHide

Other Language Names for TrattneriteHide

German:Trattnerit
Simplified Chinese:贫钾镁大隅石
Traditional Chinese:貧鉀鎂大隅石

Relationship of Trattnerite to other SpeciesHide

Member of:
Osumilite Group
Other Members of Osumilite Group:
Agakhanovite-(Y)K◻2(YCa)Be3[Si12O30]Hex. 6/mmm(6/m2/m2/m) : P6/mcc
AlmaruditeK◻2Mn2+2(Be2Al)[Si12O30]Hex. 6/mmm(6/m2/m2/m) : P6/mmm
AluminosugiliteKNa2Al2Li3[Si12O30]Hex. 6/mmm(6/m2/m2/m) : P6/mcc
ArmeniteBa(H2O)2Ca2Al3[Al3Si9O30]Orth. mmm(2/m2/m2/m) : Pnna
BerezanskiteK◻2Ti2Li3[Si12O30]Hex. 6/mmm(6/m2/m2/m) : P6/mcc
BrannockiteK◻2Sn2Li3[Si12O30]Hex. 6/mmm(6/m2/m2/m) : P6/mcc
ChayesiteK◻2Mg2(Mg2Fe3+)[Si12O30]Hex. 6/mmm(6/m2/m2/m) : P6/mcc
DarapiositeKNa2Mn2(Zn2Li)[Si12O30]Hex. 6/mmm(6/m2/m2/m) : P6/mcc
DusmatoviteK(K◻)Mn2+2Zn3[Si12O30]Hex. 6/mmm(6/m2/m2/m) : P6/mcc
EifeliteKNa2(MgNa)Mg3[Si12O30]Hex. 6/mmm(6/m2/m2/m) : P6/mcc
FriedrichbeckeiteK(◻Na)Mg2(Be2Mg)[Si12O30]Hex. 6/mmm(6/m2/m2/m) : P6/mcc
KlöchiteK◻2(Fe2+Fe3+)Zn3[Si12O30]Hex. 6/mmm(6/m2/m2/m) : P63/mmc
LaurentthomasiteK◻2Mg2(Be2Al)[Si12O30]Hex. 6/mmm(6/m2/m2/m) : P6/mcc
MerrihueiteK(◻Na)Fe2+2Fe2+3[Si12O30]Hex. 6/mmm(6/m2/m2/m) : P6/mcc
MilariteK(◻H2O)Ca2(Be2Al)[Si12O30]Hex. 6/mmm(6/m2/m2/m) : P6/mcc
OftedaliteK◻2(ScCa)Be3[Si12O30]Hex. 6/mmm(6/m2/m2/m) : P6/mcc
OsumiliteK◻2Fe2+2Al3[Al2Si10O30]Hex. 6/mmm(6/m2/m2/m) : P6/mcc
Osumilite-(Mg)K◻2Mg2Al3[Al2Si10O30] Hex. 6/mmm(6/m2/m2/m) : P6/mcc
PlechoviteCa2[K(H2O)]KBe3Si12O30Hex. 6/mmm(6/m2/m2/m) : P6/mcc
PoudretteiteK◻2Na2B3[Si12O30]Hex. 6/mmm(6/m2/m2/m) : P6/mcc
RoedderiteK(◻Na)Mg2Mg3[Si12O30]Hex. 6m2 : P62c
ShibkoviteK(◻K)Ca2Zn3[Si12O30]Hex. 6/mmm(6/m2/m2/m) : P6/mcc
SogdianiteK◻2Zr2Li3[Si12O30]Hex. 6/mmm(6/m2/m2/m) : P6/mcc
SugiliteKNa2Fe3+2Li3[Si12O30]Hex. 6/mmm(6/m2/m2/m) : P6/mcc
'UM1990-73-SiO:KMnNaZn'K(KNa0.5◻0.5)(Mn1.5Na0.5)Zn3[Si12O30]Hex.
'Unnamed (Mn3+-dominant analog of Sugilite)'KNa2Mn3+2Li3[Si12O30]
YagiiteNa◻2Mg2Al3[Al2Si10O30]Hex. 6/mmm(6/m2/m2/m) : P6/mcc

Related Minerals - Strunz-mindat GroupingHide

9.CM.AluminosugiliteKNa2Al2Li3[Si12O30]Hex. 6/mmm(6/m2/m2/m) : P6/mcc
9.CM.Agakhanovite-(Y)K◻2(YCa)Be3[Si12O30]Hex. 6/mmm(6/m2/m2/m) : P6/mcc
9.CM.05FriedrichbeckeiteK(◻Na)Mg2(Be2Mg)[Si12O30]Hex. 6/mmm(6/m2/m2/m) : P6/mcc
9.CM.05LaurentthomasiteK◻2Mg2(Be2Al)[Si12O30]Hex. 6/mmm(6/m2/m2/m) : P6/mcc
9.CM.05'UM1990-73-SiO:KMnNaZn'K(KNa0.5◻0.5)(Mn1.5Na0.5)Zn3[Si12O30]Hex.
9.CM.05EifeliteKNa2(MgNa)Mg3[Si12O30]Hex. 6/mmm(6/m2/m2/m) : P6/mcc
9.CM.05AlmaruditeK◻2Mn2+2(Be2Al)[Si12O30]Hex. 6/mmm(6/m2/m2/m) : P6/mmm
9.CM.05ArmeniteBa(H2O)2Ca2Al3[Al3Si9O30]Orth. mmm(2/m2/m2/m) : Pnna
9.CM.05MerrihueiteK(◻Na)Fe2+2Fe2+3[Si12O30]Hex. 6/mmm(6/m2/m2/m) : P6/mcc
9.CM.05OftedaliteK◻2(ScCa)Be3[Si12O30]Hex. 6/mmm(6/m2/m2/m) : P6/mcc
9.CM.05RoedderiteK(◻Na)Mg2Mg3[Si12O30]Hex. 6m2 : P62c
9.CM.05ShibkoviteK(◻K)Ca2Zn3[Si12O30]Hex. 6/mmm(6/m2/m2/m) : P6/mcc
9.CM.05SogdianiteK◻2Zr2Li3[Si12O30]Hex. 6/mmm(6/m2/m2/m) : P6/mcc
9.CM.05MilariteK(◻H2O)Ca2(Be2Al)[Si12O30]Hex. 6/mmm(6/m2/m2/m) : P6/mcc
9.CM.05PlechoviteCa2[K(H2O)]KBe3Si12O30Hex. 6/mmm(6/m2/m2/m) : P6/mcc
9.CM.05BerezanskiteK◻2Ti2Li3[Si12O30]Hex. 6/mmm(6/m2/m2/m) : P6/mcc
9.CM.05PoudretteiteK◻2Na2B3[Si12O30]Hex. 6/mmm(6/m2/m2/m) : P6/mcc
9.CM.05DarapiositeKNa2Mn2(Zn2Li)[Si12O30]Hex. 6/mmm(6/m2/m2/m) : P6/mcc
9.CM.05ChayesiteK◻2Mg2(Mg2Fe3+)[Si12O30]Hex. 6/mmm(6/m2/m2/m) : P6/mcc
9.CM.05Osumilite-(Mg)K◻2Mg2Al3[Al2Si10O30] Hex. 6/mmm(6/m2/m2/m) : P6/mcc
9.CM.05OsumiliteK◻2Fe2+2Al3[Al2Si10O30]Hex. 6/mmm(6/m2/m2/m) : P6/mcc
9.CM.05SugiliteKNa2Fe3+2Li3[Si12O30]Hex. 6/mmm(6/m2/m2/m) : P6/mcc
9.CM.05BrannockiteK◻2Sn2Li3[Si12O30]Hex. 6/mmm(6/m2/m2/m) : P6/mcc
9.CM.05KlöchiteK◻2(Fe2+Fe3+)Zn3[Si12O30]Hex. 6/mmm(6/m2/m2/m) : P63/mmc
9.CM.05DusmatoviteK(K◻)Mn2+2Zn3[Si12O30]Hex. 6/mmm(6/m2/m2/m) : P6/mcc
9.CM.05YagiiteNa◻2Mg2Al3[Al2Si10O30]Hex. 6/mmm(6/m2/m2/m) : P6/mcc
9.CM.10FaizieviteK2Na(Ca6Na)Ti4Li6[Si6O18]2[Si12O30]F2Tric. 1 : P1

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for TrattneriteHide

References for TrattneriteHide

Localities for TrattneriteHide

Showing 2 localities.

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
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Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Austria (TL)
 
  • Styria
    • Südoststeiermark District
      • Bad Gleichenberg
        • Wilhelmsdorf
Postl et al. (2004)
Germany
 
  • Rhineland-Palatinate
    • Mayen-Koblenz
      • Vordereifel
        • Ettringen
Schäfer (2016)
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