Fluorarrojadite-(BaFe)
A valid IMA mineral species
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Formula:
(Ba◻)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)F2
Colour:
Dark green to pale yellowish green
Lustre:
Vitreous
Hardness:
4 - 5
Specific Gravity:
3.63
Crystal System:
Monoclinic
Member of:
Name:
For Miguel Arrojado Lisbôa, Brazilian geologist and Redefinition after the new arrojadite nomenclature (CNMMN 05-D, October 2005).
Unique Identifiers
Mindat ID:
29065
Long-form identifier:
mindat:1:1:29065:4
Similar Names
| Fluorarrojadite-(BaNa) | A valid IMA mineral species | (Ba◻)(NaNa)Ca(Na2◻)Fe132+Al(PO4)11(PO3OH)F2 |
| Fluorarrojadite-(KNa) | (KNa)(NaNa)Ca(Na2◻)Fe132+Al(PO4)11(PO3OH)F2 | |
| Fluorarrojadite-(NaFe) | (NaNa)(Fe2+◻)Ca(Na2◻)Fe132+Al(PO4)11(PO3OH)F2 |
IMA Classification of Fluorarrojadite-(BaFe)
Approved
IMA Formula:
Na2CaBaFe2+Fe2+13Al(PO4)11(PO3OH)F2
Approval year:
2006
First published:
2006
Classification of Fluorarrojadite-(BaFe)
8.BF.05
8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
F : With medium-sized and large cations, (OH, etc.):RO4< 0.5:1
8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
F : With medium-sized and large cations, (OH, etc.):RO4< 0.5:1
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 for Standard |
|---|---|---|
| Fajd-BaFe | 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 Fluorarrojadite-(BaFe)
Vitreous
Transparency:
Transparent
Colour:
Dark green to pale yellowish green
Streak:
Yellowish-green
Hardness:
4 - 5 on Mohs scale
Density:
3.63(2) g/cm3 (Measured) 3.650 g/cm3 (Calculated)
Optical Data of Fluorarrojadite-(BaFe)
Type:
Biaxial (+)
RI values:
nα = 1.668(2) nβ = 1.670(2) nγ = 1.682(2)
2V:
Measured: 37° (2), Calculated: 44.7°
Max. Birefringence:
δ = 0.014
Based on recorded range of RI values above.
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.
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
Dispersion:
None observed.
Optical Extinction:
x = b; y ∧ c = 5(1)°.
Pleochroism:
Weak
Comments:
On a fairly thick fragment, a very slight yellowish tint to a little greenish.
Chemistry of Fluorarrojadite-(BaFe)
Mindat Formula:
(Ba◻)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)F2
Element Weights:
Crystallography of Fluorarrojadite-(BaFe)
Crystal System:
Monoclinic
Class (H-M):
m - Domatic
Space Group:
Bb
Cell Parameters:
a = 16.4970(9) Å, b = 10.0176(5) Å, c = 24.6359(13) Å
β = 105.649(2)°
β = 105.649(2)°
Ratio:
a:b:c = 1.647 : 1 : 2.459
Unit Cell V:
3,920.42 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.400 Å | (31) |
| 3.211 Å | (47) |
| 3.032 Å | (100) |
| 2.841 Å | (34) |
| 2.759 Å | (33) |
| 2.706 Å | (39) |
| 2.703 Å | (68) |
| 2.543 Å | (38) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 34 : Complex granite pegmatites |
Type Occurrence of Fluorarrojadite-(BaFe)
General Appearance of Type Material:
Dark green nodules to 5 cm in size. Also an incomplete crystal of 4x5 cm. The dark color and poor transparency are due to staining along cleavages and cracks. Small clean fragments are light yellowish green and transparent.
Place of Conservation of Type Material:
Museum d'Histoire Naturelle de Toulouse under no. MHNT.MIN.2006.38.1.
Geological Setting of Type Material:
Pegmatite
Synonyms of Fluorarrojadite-(BaFe)
Other Language Names for Fluorarrojadite-(BaFe)
Dutch:Fluorarrojadiet-(BaFe)
German:Fluorarrojadit-(BaFe)
Relationship of Fluorarrojadite-(BaFe) to other Species
Member of:
Other Members of Arrojadite Group:
| Arrojadite-(BaNa) | (Ba◻)(NaNa)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2 | Mon. 2/m : B2/b |
| Arrojadite-(KFe) | (KNa)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2 | Mon. m : Bb |
| 'Arrojadite-(KFeNa)' | (KNa)(Fe2+◻)Ca(Na2Na)Fe2+13Al(PO4)11(PO4)(OH)2 | |
| Arrojadite-(KNa) | (KNa)(NaNa)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2 | Mon. m : Bb |
| 'Arrojadite-(NaFe)' | (NaNa)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2 | |
| Arrojadite-(PbFe) | (Pb◻)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2 | Mon. m : Bb |
| Arrojadite-(SrFe) | (Sr◻)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2 | Mon. m : Bb |
| Dickinsonite-(KMnNa) | (KNa)(Mn2+◻)Ca(Na2Na)Mn2+13Al(PO4)11(PO4)(OH)2 | Mon. 2/m : B2/b |
| 'Ferri-arrojadite-(BaNa)' | (Ba◻)(NaNa)Ca(Na2◻)Fe2+13Fe3+(PO4)11(PO3OH)(OH)2 | |
| Fluorarrojadite-(BaNa) | (Ba◻)(NaNa)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)F2 | Mon. m : Bb |
| 'Fluorarrojadite-(KNa)' | (KNa)(NaNa)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)F2 | |
| 'Fluorarrojadite-(NaFe)' | (NaNa)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)F2 | |
| Fluorcarmoite-(BaNa) | (Ba◻)(NaNa)Ca(Na2◻)Mg13Al(PO4)11(PO3OH)F2 | Mon. m : Bb |
| Manganoarrojadite-(KNa) | (KNa)(NaNa)Mn2+(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2 | Mon. m : Bb |
| Sigismundite | (Ba◻)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2 | Mon. m : Bb |
Related Minerals - Strunz-mindat Grouping
| 8.BF. | Manganoarrojadite-(KNa) | (KNa)(NaNa)Mn2+(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2 |
| 8.BF. | Sigismundite | (Ba◻)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2 |
| 8.BF.05 | Dickinsonite-(KMnNa) | (KNa)(Mn2+◻)Ca(Na2Na)Mn2+13Al(PO4)11(PO4)(OH)2 |
| 8.BF.05 | Arrojadite-(KNa) | (KNa)(NaNa)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2 |
| 8.BF.05 | Fluorarrojadite-(BaNa) | (Ba◻)(NaNa)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)F2 |
| 8.BF.05 | Arrojadite-(KFe) | (KNa)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2 |
| 8.BF.05 | Arrojadite-(PbFe) | (Pb◻)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2 |
| 8.BF.05 | 'Unnamed (Ba-dominant member of dickinsonite group)' | |
| 8.BF.05 | 'Unnamed (Pb-dominant member of dickinsonite group)' | |
| 8.BF.05 | Arrojadite-(SrFe) | (Sr◻)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2 |
| 8.BF.05 | 'Arrojadite-(NaFe)' | (NaNa)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2 |
| 8.BF.05 | Arrojadite-(BaNa) | (Ba◻)(NaNa)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2 |
| 8.BF.05 | 'Arrojadite-(KFeNa)' | (KNa)(Fe2+◻)Ca(Na2Na)Fe2+13Al(PO4)11(PO4)(OH)2 |
| 8.BF.05 | 'Ferri-arrojadite-(BaNa)' | (Ba◻)(NaNa)Ca(Na2◻)Fe2+13Fe3+(PO4)11(PO3OH)(OH)2 |
| 8.BF.05 | 'Fluorarrojadite-(KNa)' | (KNa)(NaNa)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)F2 |
| 8.BF.05 | 'Fluorarrojadite-(NaFe)' | (NaNa)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)F2 |
| 8.BF.05 | Fluorcarmoite-(BaNa) | (Ba◻)(NaNa)Ca(Na2◻)Mg13Al(PO4)11(PO3OH)F2 |
| 8.BF.10 | Samuelsonite | (Ca,Ba)Ca8Fe2+2Mn2+2Al2(PO4)10(OH)2 |
| 8.BF.15 | Griphite | Na4Li2Ca6(Mn2+,Fe2+,Mg)19Al8(PO4)24(F,OH)8 |
| 8.BF.20 | Nabiasite | BaMn9(VO4)6(OH)2 |
| 8.BF.25 | Starovaite | KCu5O(VO4)3 |
| 8.BF.30 | Achyrophanite | (K,Na)3(Fe3+,Ti,Al,Mg)5O2(AsO4)5 |
| 8.BF.35 | Cryptochalcite | K2Cu5O(SO4)5 |
| 8.BF.35 | Cesiodymite | CsKCu5O(SO4)5 |
Other Information
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 Fluorarrojadite-(BaFe)
mindat.org URL:
https://www.mindat.org/min-29065.html
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References for Fluorarrojadite-(BaFe)
Reference List:
Camara, F. (2006) The arrojadite enigma: I. A new formula and a new model for the arrojadite structure. American Mineralogist, 91 (8) 1249-1259 doi:10.2138/am.2006.2189
Localities for Fluorarrojadite-(BaFe)
Showing 2 localities.
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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.
Morocco (TL) | |
| |
Slovakia | |
| Števko et al. (2015) |
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