Bjarebyite
A valid IMA mineral species
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About Bjarebyite
Gunnar Bjareby
Formula:
(Ba,Sr)(Mn2+,Fe2+,Mg)2Al2(PO4)3(OH)3
Colour:
Emerald green
Lustre:
Sub-Adamantine
Hardness:
4
Specific Gravity:
3.90 - 3.95
Crystal System:
Monoclinic
Member of:
Name:
Named in 1973 by Paulus B. Moore, Dennis H. Lund, and K. L. Keester in honor of Alfred Gunnar Bjareby [February 11, 1899, Forslovsholm, Sweden - June 1967 Boston, Massachusetts, USA], Swedish-American artist and noted mineral collector.
This page provides mineralogical data about Bjarebyite.
Unique Identifiers
Mindat ID:
692
Long-form identifier:
mindat:1:1:692:1
IMA Classification of Bjarebyite
Approved
IMA Formula:
BaMn2+2Al2(PO4)3(OH)3
Approval year:
1972
First published:
1973
Classification of Bjarebyite
8.BH.20
8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
H : With medium-sized and large cations, (OH,etc.):RO4 = 1:1
8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
H : With medium-sized and large cations, (OH,etc.):RO4 = 1:1
41.9.1.3
41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
9 : (AB)5(XO4)3Zq
41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
9 : (AB)5(XO4)3Zq
19.5.13
19 : Phosphates
5 : Phosphates of Sr and Ba
19 : Phosphates
5 : Phosphates of Sr and Ba
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 |
|---|---|---|
| Bj | 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 Bjarebyite
Sub-Adamantine
Transparency:
Translucent
Colour:
Emerald green
Streak:
White
Hardness:
4 on Mohs scale
Cleavage:
Perfect
{010} and {100}
{010} and {100}
Density:
3.90 - 3.95 g/cm3 (Measured) 3.97(5) g/cm3 (Calculated)
Optical Data of Bjarebyite
Type:
Biaxial (+)
RI values:
nα = 1.692 - 1.724 nβ = 1.695 - 1.727 nγ = 1.710 - 1.749
2V:
Measured: 35° , Calculated: 50°
Max. Birefringence:
δ = 0.018 - 0.025
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:
Very High (positive)
Relative to Canada balsam mounting medium (n ≈ 1.537).
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 biaxial acute bisectrix (Bxa) interference figure
- the conoscopic view for a grain cut perpendicular to the acute bisectrix, using
this mineral's 2V. The two small white dots mark the melatopes - the points
where the two optic axes emerge - and are shown only when they fall within the
field of view. The coloured bands are isochromatics, and the dark bands are
isogyres.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Dispersion:
weak to distinct
Optical Extinction:
Y = b, Z ∧ c = 7–8°.
Pleochroism:
Visible
Comments:
Weak, grayish tan to pale yellow-green; also strong, X = colorless to pale brownish yellow; Y = brownish green; Z = apple-green or olive-green.
Chemistry of Bjarebyite
Mindat Formula:
(Ba,Sr)(Mn2+,Fe2+,Mg)2Al2(PO4)3(OH)3
Element Weights:
Chemical Analysis
Oxide wt%:
| 1 | |
|---|---|
| P2O5 | 32,96 % |
| Al2O3 | 13,25 % |
| Fe2O3 | 3,3 % |
| FeO | 5,94 % |
| MnO | 15,98 % |
| H2O | 4,7 % |
| Total: | 72 % |
Crystallography of Bjarebyite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/m
Setting:
P21/m
Cell Parameters:
a = 8.930(14) Å, b = 12.073(24) Å, c = 4.917(9) Å
β = 100.15(13)°
β = 100.15(13)°
Ratio:
a:b:c = 0.74 : 1 : 0.407
Unit Cell V:
521.81 ų (Calculated from Unit Cell)
Z:
2
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
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CIF File Best | x | y | z | a | b | c
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0000407 | Bjarebyite | Moore P B, Araki T (1974) Bjarebyite, Ba(Mn,Fe)2Al2(OH)3[PO4]3: Its atomic arrangement American Mineralogist 59 567-572 |  | 1974 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.090 Å | (10) |
| 8.81 Å | (7) |
| 2.681 Å | (7) |
| 1.495 Å | (5) |
| 4.97 Å | (4) |
| 4.47 Å | (4) |
| 2.910 Å | (4) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Near-surface Processes | |
| 22 : Hydration and low-? subsurface aqueous alteration (see also #23) | |
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 34 : Complex granite pegmatites | |
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47c : [Carbonates, phosphates, borates, nitrates] |
Type Occurrence of Bjarebyite
General Appearance of Type Material:
As multiply-faceted, steeply-terminated, spearhead-shaped crystals, to 3 mm.
Place of Conservation of Type Material:
n.d.
Geological Setting of Type Material:
Late stage reaction product of triphylite and amblygonite in complex granite pegmatites.
Associated Minerals at Type Locality:
Synonyms of Bjarebyite
Other Language Names for Bjarebyite
Relationship of Bjarebyite to other Species
Member of:
Other Members of Bjarebyite Group:
| Johntomaite | BaFe2+2Fe3+2(PO4)3(OH)3 | Mon. 2/m : P21/m |
| Kulanite | Ba(Fe2+,Mn2+,Mg)2(Al,Fe3+)2(PO4)3(OH)3 | Mon. 2/m : P21/m |
| Nigelcookite | PbFe2+2V3+2(PO4)3(OH)3 | Mon. 2/m : P21/m |
| Penikisite | Ba(Mg,Fe2+,Ca)2Al2(PO4)3(OH)3 | Mon. 2/m : P21/m |
| Perloffite | Ba(Mn2+,Fe2+)2Fe3+2(PO4)3(OH)3 | Mon. 2/m : P21/m |
| Plumbojohntomaite | PbFe2+2Fe3+2(PO4)3(OH)3 | Mon. 2/m : P21/m |
| Plumboperloffite | PbMn2+2Fe3+2(PO4)3(OH)3 | Mon. 2/m : P21/m |
| Strontioperloffite | SrMn2+2Fe3+2(PO4)3(OH)3 | Mon. 2/m : P21/m |
Common Associates
Associations Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
| 8.BH. | Peterchinite | Zn3Zn2(OH)6As[O3(OH)3] |
| 8.BH. | Reznitskyite | CaMg(VO4)F |
| 8.BH. | Plumbogottlobite | PbMg(VO4)(OH) |
| 8.BH. | Cuprozheshengite | Pb4CuZn2(AsO4)2(PO4)2(OH)2 |
| 8.BH. | Zheshengite | Pb4ZnZn2(AsO4)2(PO4)2(OH)2 |
| 8.BH. | Crimsonite | PbFe3+2(PO4)2(OH)2 |
| 8.BH.05 | Thadeuite | Ca(Mg,Fe2+)3(PO4)2(OH,F)2 |
| 8.BH.10 | Panasqueiraite | CaMg(PO4)(OH) |
| 8.BH.10 | Isokite | CaMg(PO4)F |
| 8.BH.10 | Lacroixite | NaAl(PO4)F |
| 8.BH.10 | Arsenatrotitanite | NaTi(AsO4)O |
| 8.BH.10 | Maxwellite | NaFe3+(AsO4)F |
| 8.BH.10 | Durangite | NaAl(AsO4)F |
| 8.BH.10 | Kononovite | NaMg(SO4)F |
| 8.BH.15 | Drugmanite | Pb2Fe3+(PO4)(PO3OH)(OH)2 |
| 8.BH.20 | Nigelcookite | PbFe2+2V3+2(PO4)3(OH)3 |
| 8.BH.20 | Plumbojohntomaite | PbFe2+2Fe3+2(PO4)3(OH)3 |
| 8.BH.20 | Cirrolite | Ca3Al2(PO4)3(OH)3 (?) |
| 8.BH.20 | Penikisite | Ba(Mg,Fe2+,Ca)2Al2(PO4)3(OH)3 |
| 8.BH.20 | Perloffite | Ba(Mn2+,Fe2+)2Fe3+2(PO4)3(OH)3 |
| 8.BH.20 | Bjarebyite Group | |
| 8.BH.20 | Strontioperloffite | SrMn2+2Fe3+2(PO4)3(OH)3 |
| 8.BH.20 | Plumboperloffite | PbMn2+2Fe3+2(PO4)3(OH)3 |
| 8.BH.20 | Johntomaite | BaFe2+2Fe3+2(PO4)3(OH)3 |
| 8.BH.20 | Kulanite | Ba(Fe2+,Mn2+,Mg)2(Al,Fe3+)2(PO4)3(OH)3 |
| 8.BH.25 | Bertossaite | Li2CaAl4(PO4)4(OH)4 |
| 8.BH.25 | Natropalermoite | Na2SrAl4(PO4)4(OH)4 |
| 8.BH.25 | Palermoite | Li2SrAl4(PO4)4(OH)4 |
| 8.BH.30 | Sewardite | CaFe3+2(AsO4)2(OH)2 |
| 8.BH.30 | Carminite | PbFe3+2(AsO4)2(OH)2 |
| 8.BH.35 | Adelite | CaMg(AsO4)(OH) |
| 8.BH.35 | Duftite | PbCu(AsO4)(OH) |
| 8.BH.35 | Cobaltaustinite | CaCo(AsO4)(OH) |
| 8.BH.35 | Nickelaustinite | CaNi(AsO4)(OH) |
| 8.BH.35 | Gabrielsonite | PbFe3+(As3+O3)O |
| 8.BH.35 | Conichalcite | CaCu(AsO4)(OH) |
| 8.BH.35 | Arsendescloizite | PbZn(AsO4)(OH) |
| 8.BH.35 | 'Duftite-alpha' | PbCu(AsO4)(OH) |
| 8.BH.35 | Gottlobite | CaMg(VO4)(OH) |
| 8.BH.35 | Austinite | CaZn(AsO4)(OH) |
| 8.BH.35 | Hermannroseite | CaCu(PO4)(OH) |
| 8.BH.35 | Tangeite | CaCu(VO4)(OH) |
| 8.BH.40 | Čechite | PbFe2+(VO4)(OH) |
| 8.BH.40 | Khorixasite | (Bi0.67◻0.33)Cu(VO4)(OH) |
| 8.BH.40 | Mottramite | PbCu(VO4)(OH) |
| 8.BH.40 | Descloizite | PbZn(VO4)(OH) |
| 8.BH.40 | Pyrobelonite | PbMn2+(VO4)(OH) |
| 8.BH.45 | Bayldonite | PbCu3(AsO4)2(OH)2 |
| 8.BH.45 | Vésigniéite | BaCu3(VO4)2(OH)2 |
| 8.BH.50 | Paganoite | NiBi(AsO4)O |
| 8.BH.55 | Jagowerite | BaAl2(PO4)2(OH)2 |
| 8.BH.55 | Harrisonite | Ca(Fe2+,Mg)6(PO4)2(SiO4)2 |
| 8.BH.60 | Attakolite | CaMn2+Al4(SiO3OH)(PO4)3(OH)4 |
| 8.BH.65 | Leningradite | PbCu3(VO4)2Cl |
| 8.BH.70 | Katiarsite | KTiO(AsO4) |
| 8.BH.70 | Yurgensonite | K2SnTiO2(AsO4)2 |
| 8.BH.75 | Melanarsite | K3Cu7Fe3+O4(AsO4)4 |
| 8.BH.80 | Evseevite | Na2Mg(AsO4)F |
| 8.BH.80 | Moraskoite | Na2Mg(PO4)F |
| 8.BH.85 | Piccoliite | NaCaMn3+2(AsO4)2O(OH) |
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 Bjarebyite
mindat.org URL:
https://www.mindat.org/min-692.html
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Please feel free to link to this page.
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References for Bjarebyite
Reference List:
Moore, Paul B., Lund, Dennis H., Keester, Kenneth L. (1973) Bjarebyite, (Ba,Sr)(Mn,Fe,Mg)2Al2(OH)3(PO4)3, a New Species. The Mineralogical Record, 4 (6) 282-285
Localities for Bjarebyite
Showing 7 localities.
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.
Austria | |
| Niedermayr et al. (1995) +1 other reference |
| Bojar (2019) |
Canada | |
| Robinson et al. (1992) |
Rwanda | |
| von Knorring (1969) +3 other references |
Sweden | |
| Thomasson (1983) |
USA | |
| Rocks & Min. 80:251 |
| Moore (1973) +3 other references |
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Palermo No. 1 Mine, Groton, Grafton County, New Hampshire, USA