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Harrisonite

A valid IMA mineral species
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About HarrisoniteHide

Formula:
Ca(Fe2+,Mg)6(PO4)2(SiO4)2
Colour:
Yellow-brown to orange-brown
Lustre:
Vitreous
Hardness:
4 - 5
Specific Gravity:
4.02
Crystal System:
Trigonal
Name:
Named by A.C. Roberts, J.A.R. Stirling, J.D. Grice, T. Frisch, R.K. Herd, and J.L. Jambor in 1993 in honor of James Merritt Harrison (20 September 1915, Regina, Saskatchewan, Canada – 6 July 1990, Canada), geoscientist and former Director of the Geological Survey of Canada (1956-1964). He was awarded the Logan Medal from the Geological Association of Canada in 1969.
The material from Czech pegmatites is manganese- and phosphorus-bearing. The latter substitution is related to Si deficiency.

The pegmatitic occurrence suggests the mineral to be stable lower P–T conditions than these reported for the holotype (Vácha & Škoda 2022).


Unique IdentifiersHide

Mindat ID:
1821
Long-form identifier:
mindat:1:1:1821:6

IMA Classification of HarrisoniteHide

Classification of HarrisoniteHide

8.BH.55

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
H : With medium-sized and large cations, (OH,etc.):RO4 = 1:1

Mineral SymbolsHide

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

SymbolSourceReference for Standard
HrsIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of HarrisoniteHide

Vitreous
Transparency:
Transparent, Translucent
Colour:
Yellow-brown to orange-brown
Streak:
Pale yellow
Hardness:
4 - 5 on Mohs scale
Tenacity:
Brittle
Cleavage:
Poor/Indistinct
Fracture:
Conchoidal
Density:
4.02 g/cm3 (Measured)    4.01 g/cm3 (Calculated)

Optical Data of HarrisoniteHide

Type:
Uniaxial (-)
RI values:
nω = 1.770(5) nε = 1.759(3)
2V:
Measured: 5°
Max. Birefringence:
δ = 0.011
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:
Very High (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:
Weak
Comments:
Pale yellow tints

Chemistry of HarrisoniteHide

Mindat Formula:
Ca(Fe2+,Mg)6(PO4)2(SiO4)2
Element Weights:
Element% weight
Fe44.720 %
O34.166 %
P8.268 %
Si7.497 %
Ca5.349 %

Calculated from ideal end-member formula.
Fe
O
P
Si
Ca
Common Impurities:
Mn

Crystallography of HarrisoniteHide

Crystal System:
Trigonal
Class (H-M):
3m(32/m) - Hexagonal Scalenohedral
Space Group:
R3m
Setting:
R3m
Cell Parameters:
a = 6.248(1) Å, c = 26.802(7) Å
Ratio:
a:c = 1 : 4.29
Unit Cell V:
906.11 ų (Calculated from Unit Cell)
Z:
3

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0005340HarrisoniteGrice J D, Roberts A C (1993) Harrisonite, a well-ordered silico-phosphate with a layered crystal structure. Ca(Fe,Mg)6(SiO4)2(PO4)2 The Canadian Mineralogist 31 781-7851993Arcedeckne Island, Artic Canada0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
5.00 Å(60)
4.46 Å(50)
3.119 Å(100)
2.976 Å(50)
2.689 Å(80)
2.558 Å(100)
2.505 Å(80)
1.903 Å(60)
1.560 Å(80)

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 5: Initiation of plate tectonics<3.5-2.5
40 : Regional metamorphism (greenschist, amphibolite, granulite facies)

Type Occurrence of HarrisoniteHide

General Appearance of Type Material:
Discrete equidimensional anhedral grains and as a rim around fluorapatite.
Place of Conservation of Type Material:
Canadian Geological Survey, Ottawa, 66402.
Canadian Museum of Nature, Ottawa, Canada, 59685.
Geological Setting of Type Material:
Iron silicate - quartz - apatite layered body found in granulite-facies gneiss.
Associated Minerals at Type Locality:

Synonyms of HarrisoniteHide

Other Language Names for HarrisoniteHide

Related Minerals - Strunz-mindat GroupingHide

8.BH.PeterchiniteZn3Zn2(OH)6As[O3(OH)3]Mon. 2/m : B2/m
8.BH.ReznitskyiteCaMg(VO4)FMon. 2/m : B2/b
8.BH.PlumbogottlobitePbMg(VO4)(OH)Orth. mmm(2/m2/m2/m) : Pnma
8.BH.CuprozheshengitePb4CuZn2(AsO4)2(PO4)2(OH)2Tric. 1 : P1
8.BH.ZheshengitePb4ZnZn2(AsO4)2(PO4)2(OH)2Tric. 1 : P1
8.BH.CrimsonitePbFe3+2(PO4)2(OH)2Orth. mmm(2/m2/m2/m) : Cccm
8.BH.05ThadeuiteCa(Mg,Fe2+)3(PO4)2(OH,F)2Orth. 222 : C2221
8.BH.10PanasqueiraiteCaMg(PO4)(OH)Mon.
8.BH.10IsokiteCaMg(PO4)FMon. 2/m : B2/b
8.BH.10LacroixiteNaAl(PO4)FMon. 2/m : B2/b
8.BH.10ArsenatrotitaniteNaTi(AsO4)OMon. 2/m : B2/b
8.BH.10MaxwelliteNaFe3+(AsO4)FMon. 2/m : P2/c
8.BH.10DurangiteNaAl(AsO4)FMon. 2/m : B2/b
8.BH.10KononoviteNaMg(SO4)FMon. 2/m : B2/b
8.BH.15DrugmanitePb2Fe3+(PO4)(PO3OH)(OH)2Mon. 2/m : P21/c
8.BH.20Nigelcookite PbFe2+2V3+2(PO4)3(OH)3Mon. 2/m : P21/m
8.BH.20Plumbojohntomaite PbFe2+2Fe3+2(PO4)3(OH)3Mon. 2/m : P21/m
8.BH.20CirroliteCa3Al2(PO4)3(OH)3 (?)
8.BH.20PenikisiteBa(Mg,Fe2+,Ca)2Al2(PO4)3(OH)3Mon. 2/m : P21/m
8.BH.20PerloffiteBa(Mn2+,Fe2+)2Fe3+2(PO4)3(OH)3Mon. 2/m : P21/m
8.BH.20Bjarebyite Group
8.BH.20StrontioperloffiteSrMn2+2Fe3+2(PO4)3(OH)3Mon. 2/m : P21/m
8.BH.20PlumboperloffitePbMn2+2Fe3+2(PO4)3(OH)3Mon. 2/m : P21/m
8.BH.20JohntomaiteBaFe2+2Fe3+2(PO4)3(OH)3Mon. 2/m : P21/m
8.BH.20Bjarebyite(Ba,Sr)(Mn2+,Fe2+,Mg)2Al2(PO4)3(OH)3Mon. 2/m : P21/m
8.BH.20KulaniteBa(Fe2+,Mn2+,Mg)2(Al,Fe3+)2(PO4)3(OH)3Mon. 2/m : P21/m
8.BH.25BertossaiteLi2CaAl4(PO4)4(OH)4Orth. mmm(2/m2/m2/m)
8.BH.25NatropalermoiteNa2SrAl4(PO4)4(OH)4Orth. mmm(2/m2/m2/m)
8.BH.25PalermoiteLi2SrAl4(PO4)4(OH)4Orth. mmm(2/m2/m2/m)
8.BH.30SewarditeCaFe3+2(AsO4)2(OH)2Orth. mmm(2/m2/m2/m) : Cccm
8.BH.30CarminitePbFe3+2(AsO4)2(OH)2Orth. mmm(2/m2/m2/m) : Cccm
8.BH.35AdeliteCaMg(AsO4)(OH)Orth. 222 : P212121
8.BH.35DuftitePbCu(AsO4)(OH)Orth. 222 : P212121
8.BH.35CobaltaustiniteCaCo(AsO4)(OH)Orth. 222 : P212121
8.BH.35NickelaustiniteCaNi(AsO4)(OH)Orth. 222 : P212121
8.BH.35GabrielsonitePbFe3+(As3+O3)OOrth. mm2 : Pmc21
8.BH.35ConichalciteCaCu(AsO4)(OH)Orth. 222 : P212121
8.BH.35ArsendescloizitePbZn(AsO4)(OH)Orth. 222 : P212121
8.BH.35'Duftite-alpha'PbCu(AsO4)(OH)
8.BH.35GottlobiteCaMg(VO4)(OH)Orth. 222 : P212121
8.BH.35AustiniteCaZn(AsO4)(OH)Orth. 222 : P212121
8.BH.35HermannroseiteCaCu(PO4)(OH)Orth. 222 : P212121
8.BH.35TangeiteCaCu(VO4)(OH)Orth. 222 : P212121
8.BH.40ČechitePbFe2+(VO4)(OH)Orth. mmm(2/m2/m2/m)
8.BH.40Khorixasite(Bi0.67◻0.33)Cu(VO4)(OH)Mon. 2/m : P2/c
8.BH.40MottramitePbCu(VO4)(OH)Orth. mmm(2/m2/m2/m) : Pnma
8.BH.40DescloizitePbZn(VO4)(OH)Orth. mmm(2/m2/m2/m) : Pnma
8.BH.40PyrobelonitePbMn2+(VO4)(OH)Orth. mmm(2/m2/m2/m) : Pnma
8.BH.45BayldonitePbCu3(AsO4)2(OH)2Mon. 2/m : B2/b
8.BH.45VésigniéiteBaCu3(VO4)2(OH)2Mon. 2/m : B2/m
8.BH.50PaganoiteNiBi(AsO4)OTric. 1 : P1
8.BH.55JagoweriteBaAl2(PO4)2(OH)2Tric.
8.BH.60AttakoliteCaMn2+Al4(SiO3OH)(PO4)3(OH)4Mon. 2/m : B2/m
8.BH.65LeningraditePbCu3(VO4)2ClOrth. mmm(2/m2/m2/m) : Ibam
8.BH.70KatiarsiteKTiO(AsO4)Orth. mm2 : Pna21
8.BH.70YurgensoniteK2SnTiO2(AsO4)2Orth. mm2 : Pna21
8.BH.75MelanarsiteK3Cu7Fe3+O4(AsO4)4Mon. 2/m : B2/b
8.BH.80EvseeviteNa2Mg(AsO4)FOrth. mmm(2/m2/m2/m) : Pbcn
8.BH.80MoraskoiteNa2Mg(PO4)FOrth. mmm(2/m2/m2/m) : Pbcn
8.BH.85PiccoliiteNaCaMn3+2(AsO4)2O(OH)Orth. mmm(2/m2/m2/m) : Pbcm

Fluorescence of HarrisoniteHide

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 HarrisoniteHide

References for HarrisoniteHide

Localities for HarrisoniteHide

Showing 5 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.
Brazil
 
  • Minas Gerais
    • Conselheiro Pena
      • Barra do Cuieté
Baijot et al. (2014)
Canada (TL)
 
  • Nunavut
    • Kitikmeot Region
Roberts et al. (1993)
Czech Republic
 
  • Central Bohemian Region
    • Kutná Hora District
      • Vlkaneč
Vácha et al. (2022)
  • Vysočina Region
    • Žďár nad Sázavou District
      • Bory
        • Horní Bory
          • Cyrilov (Cyrillhof)
Škoda et al. (2007) +1 other reference
Germany
 
  • Bavaria
    • Upper Bavaria
      • Traunstein District
Neumair et al. (2016) +1 other reference
 
and/or  
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