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Ferroindialite

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About FerroindialiteHide

Formula:
(Fe2+,Mg)2Al4Si5O18
Colour:
Brownish-violet to gray with violet-blue tint
Hardness:
7
Specific Gravity:
2.66
Crystal System:
Hexagonal
Name:
For being the iron analogue of indialite.
Dimorph of:
The ferrous Fe (Fe2+)-dominant analogue of indialite; a high-temperature phase.

First reported in 1982 from Toyama prefecture, Japan.


Classification of FerroindialiteHide

Approved

Physical Properties of FerroindialiteHide

Colour:
Brownish-violet to gray with violet-blue tint
Hardness:
Tenacity:
Brittle
Cleavage:
None Observed
Density:
2.66(1) g/cm3 (Measured)    2.667 g/cm3 (Calculated)

Optical Data of FerroindialiteHide

Type:
Biaxial (-)
RI values:
nα = 1.539(2) nβ = 1.552(2) nγ = 1.554(2)
Max Birefringence:
δ = 0.015
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
Weak, r < v
Pleochroism:
Weak
Comments:
from colorless on X to pale violet on Z

Chemical Properties of FerroindialiteHide

Formula:
(Fe2+,Mg)2Al4Si5O18

Crystallography of FerroindialiteHide

Crystal System:
Hexagonal
Class (H-M):
6/mmm (6/m 2/m 2/m) - Dihexagonal Dipyramidal
Space Group:
P6/mcc
Setting:
P6/mcc
Cell Parameters:
a = 9.8759(3) Å, c = 9.3102(3) Å
Ratio:
a:c = 1 : 0.943
Unit Cell V:
786.4 ų
Z:
2
Morphology:
Short prismatic or thick tabular hexagonal crystals.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
8.59(100)
4.094(27)
3.390(35)
3.147(19)
3.055(31)
2.657(12)
1.695(9)
Comments:
From Type Description.

Type Occurrence of FerroindialiteHide

General Appearance of Type Material:
Short prismatic or thick tabular hexagonal crystals up to 1.5 mm in size
Place of Conservation of Type Material:
Type material is deposited in the collections of the Fersman Mineralogical Museum of the Russian Academy of Sciences, Moscow, Russia, registration number 4400/1
Geological Setting of Type Material:
In a burnt xenolith of pelitic rock among alkaline basalts.
Associated Minerals at Type Locality:

Synonyms of FerroindialiteHide

Other InformationHide

Notes:
IR spectrum shows the absence of H20 or ОН groups
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for FerroindialiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Chukanov, N.V., Aksenov, S.M., Pekov, I.G., Ternes, B., Schüller, W., Belakovskiy, D.I., Van, K.V. and Blass, G. (2013) Ferroindialite, IMA 2013-016. CNMNC Newsletter No. 16, August 2013, page 2704; Mineralogical Magazine, 77, 2695-2709.
Kitamura & Hiroi (1982) Mineralogy and Petrology, 80, 110-116.
Haefeker, U.; Kaindl, R.; Tropper, P.; Krüger, H.; Kahlenberg, V.; Orlova, M. (2014): Structural investigations of the two polymorphs of synthetic Fe-cordierite and Raman spectroscopy of hexagonal Fe-cordierite. Mineralogy and Petrology 108, 469-478.
Chukanov, N.V., Aksenov, S.M., Pekov, I.V., Ternes, В., Schüller, W., Belakovskiy, D.I., Van, K.V., Blass, G. (2014): Ferroindialite (Fe2+,Mg)2Al4Si5O18, a new beryl-group mineral from the Eifel volcanic region, Germany. Zapiski RMO, 143, 46-56.

Internet Links for FerroindialiteHide

Localities for FerroindialiteHide

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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Czech Republic
 
  • Central Bohemia Region
Joan Rosell - Rosellminerals.com
Germany (TL)
 
  • Rhineland-Palatinate
    • Mayen
      • Ettringen
        • Bellerberg volcano
Chukanov, N.V., Aksenov, S.M., Pekov, I.V., Ternes, В., Schüller, W., Belakovskiy, D.I., Van, K.V., Blass, G. (2014): Ferroindialite (Fe2+,Mg)2Al4Si5O18, a new beryl-group mineral from the Eifel volcanic region, Germany. Zapiski RMO, 143, 46-56.
Japan
 
  • Honshu Island
    • Chubu Region
      • Toyama Prefecture
        • Kurobe City
Kitamura & Hiroi (1982) Mineralogy and Petrology, 80, 110-116.
USA
 
  • Wyoming
    • Campbell Co.
      • Reno Junction
Gunnar Färber - Mineralienliste 3-2017.
Mineral and/or Locality  
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