Ferroindialite
A valid IMA mineral species
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About Ferroindialite
Formula:
(Fe2+,Mg)2Al4Si5O18
Colour:
Brownish-violet to gray with violet-blue tint
Lustre:
Vitreous
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.
First reported in 1982 from Toyama prefecture, Japan.
Unique Identifiers
Mindat ID:
43879
Long-form identifier:
mindat:1:1:43879:5
GUID
(UUID V4):
(UUID V4):
90c822dc-bb22-4f17-94cb-2d55e3cd4654
IMA Classification of Ferroindialite
Approved
First published:
2014
Classification of Ferroindialite
9.CJ.05
9 : SILICATES (Germanates)
C : Cyclosilicates
J : [Si6O18]12- 6-membered single rings (sechser-Einfachringe), without insular complex anions
9 : SILICATES (Germanates)
C : Cyclosilicates
J : [Si6O18]12- 6-membered single rings (sechser-Einfachringe), without insular complex anions
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Find | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Ferroindialite
Vitreous
Colour:
Brownish-violet to gray with violet-blue tint
Streak:
White
Hardness:
7 on Mohs scale
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Conchoidal
Density:
2.66(1) g/cm3 (Measured) 2.667 g/cm3 (Calculated)
Optical Data of Ferroindialite
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.
and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
Weak, r < v
Pleochroism:
Weak
Comments:
X = colorless, Z = pale violet.
Chemistry of Ferroindialite
Mindat Formula:
(Fe2+,Mg)2Al4Si5O18
Crystallography of Ferroindialite
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 Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 8.59 Å | (100) |
| 4.094 Å | (27) |
| 3.390 Å | (35) |
| 3.147 Å | (19) |
| 3.055 Å | (31) |
| 2.657 Å | (12) |
| 1.695 Å | (9) |
Comments:
From Type Description.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 10b: Anthropogenic minerals | <10 Ka |
| 54 : Coal and other mine fire minerals (see also #51 and #56) |
Type Occurrence of Ferroindialite
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:
Reference:
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.
Synonyms of Ferroindialite
Related Minerals - Strunz-mindat Grouping
| 9.CJ. | Avdeevite | NaAl4(Be5Li)(Si6O18)2(H2O)1-2 |
| 9.CJ. | Nakkaalaaqite | K2[Na3Ca]LiCa2Ti2Be4Si12O38 |
| 9.CJ. | Zolotarevite | Na5Zr[Si6O15(OH)3] · 3H2O |
| 9.CJ. | Beryllocordierite-Na | NaMg4(Al5Be)(AlSi5O18)2 · 2H2O |
| 9.CJ. | Beryllosachanbińskiite-Na | NaMn4(Al5Be)(AlSi5O18)2 · 2H2O |
| 9.CJ.05 | Bazzite | Be3Sc2(Si6O18) |
| 9.CJ.05 | Beryl | Be3Al2(Si6O18) |
| 9.CJ.05 | Indialite | Mg2Al3(AlSi5O18) |
| 9.CJ.05 va | Vorobyevite | Be3Al2(Si6O18) |
| 9.CJ.05 | Stoppaniite | Be3Fe3+2(Si6O18) · H2O |
| 9.CJ.05 | Johnkoivulaite | Cs[Be2B]Mg2Si6O18 |
| 9.CJ.10 | Cordierite | (Mg,Fe)2Al3(AlSi5O18) |
| 9.CJ.10 | Sekaninaite | (Fe,Mg)2Al3(AlSi5O18) |
| 9.CJ.15a | Combeite | Na4.5Ca3.5Si6O17.5(OH)0.5 |
| 9.CJ.15b | Imandrite | Na12Ca3Fe3+2(Si6O18)2 |
| 9.CJ.15a | Kazakovite | Na6Mn2+Ti(Si6O18) |
| 9.CJ.15c | Koashvite | Na6(Ca,Mn)(Ti,Fe)Si6O18 · H2O |
| 9.CJ.15a | Lovozerite | Na2Ca(Zr,Ti)(Si6O12)[(OH)4O2] · H2O |
| 9.CJ.15a | Tisinalite | Na3H3(Mn,Ca,Fe)TiSi6(O,OH)18 · 2H2O |
| 9.CJ.15a | Zirsinalite | Na6(Ca,Mn2+,Fe2+)Zr(Si6O18) |
| 9.CJ.15a | Litvinskite | Na2(◻,Na,Mn)ZrSi6O12(OH,O)6 |
| 9.CJ.15a | Kapustinite | Na6ZrSi6O16(OH)2 |
| 9.CJ.15a | Townendite | Na8ZrSi6O18 |
| 9.CJ.25 | Baratovite | KCa7(Ti,Zr)2Li3Si12O36F2 |
| 9.CJ.25 | Katayamalite | KLi3Ca7Ti2(SiO3)12(OH)2 |
| 9.CJ.25 | Aleksandrovite | KCa7Sn2Li3Si12O36F2 |
| 9.CJ.30 | Dioptase | CuSiO3 · H2O |
| 9.CJ.35 | Kostylevite | K2Zr(Si3O9) · H2O |
| 9.CJ.40 | Petarasite | Na5Zr2(Si6O18)(Cl,OH) · 2H2O |
| 9.CJ.45 | Gerenite-(Y) | (Ca,Na)2(Y,REE)3Si6O18 · 2H2O |
| 9.CJ.50 | Odintsovite | K2Na4Ca3Ti2Be4Si12O38 |
| 9.CJ.55 | Mathewrogersite | Pb7FeAl3GeSi12O36(OH,H2O)6 |
| 9.CJ.60 | Pezzottaite | Cs(Be2Li)Al2(Si6O18) |
Other Information
Notes:
IR spectrum shows the absence of H2O 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.
Internet Links for Ferroindialite
mindat.org URL:
https://www.mindat.org/min-43879.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for Ferroindialite
Localities for Ferroindialite
symbol to view information about a locality.
The Locality List
- 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).
All localities listed without proper references should be considered as questionable.
Czech Republic | |
| Joan Rosell - rosellminerals.com |
| Dalibor Matýsek |
Germany (TL) | |
| Chukanov et al. (2014) |
Japan | |
| Kitamura & Hiroi (1982) |
Mongolia | |
| Savina et al. (2020) |
| Peretyazhko et al. (2018) |
| Peretyazhko et al. (2018) | |
USA | |
| Gunnar Färber - Mineralienliste 3-2017. |
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Caspar quarry, Ettringen, Vordereifel, Mayen-Koblenz, Rhineland-Palatinate, Germany