IMPORTANT MESSAGE. We need your support now to keep mindat.org running. Click here to find out why.
Log InRegister
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for Educators
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
StatisticsThe ElementsUsersBooks & MagazinesMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Harkerite

This page is currently not sponsored. Click here to sponsor this page.
Hide all sections | Show all sections

About HarkeriteHide

Alfred Harker
Formula:
Ca12Mg4Al(BO3)3(SiO4)4(CO3)5 · H2O
Colour:
White; also tannish brown
Lustre:
Sub-Vitreous, Waxy, Dull
Specific Gravity:
2.96
Crystal System:
Trigonal
Name:
Named in 1948 by Cecil Edgar Tilley for systematic petrologists Alfred Harker (February 19, 1859 - July 28, 1939) of the Scottish Geological Survey.
White to tannish brown pseudo-octahedral crystals.

Structurally related to sakhaite.

Compare UM1990-59-SiO:AlBCHMg.



Classification of HarkeriteHide

Approved, 'Grandfathered' (first described prior to 1959)
6.AB.70

6 : BORATES
A : Monoborates
B : BO3, with additional anions; 1(D) + OH, etc.
17.1.9.1

17 : COMPOUND CARBONATES
1 : Miscellaneous
17.5.16

17 : Silicates Containing other Anions
5 : Borosilicates

Physical Properties of HarkeriteHide

Sub-Vitreous, Waxy, Dull
Transparency:
Translucent
Colour:
White; also tannish brown
Streak:
White
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven
Density:
2.96 g/cm3 (Measured)    3.00 g/cm3 (Calculated)

Optical Data of HarkeriteHide

Type:
Uniaxial
RI values:
nα = 1.649 - 1.653 nβ = 1.649 - 1.653
Max Birefringence:
δ = 1.649
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Optical Extinction:
May be anomalously biaxial
Pleochroism:
Non-pleochroic

Chemical Properties of HarkeriteHide

Formula:
Ca12Mg4Al(BO3)3(SiO4)4(CO3)5 · H2O
IMA Formula:
Ca12Mg4Al(CO3)5(BO3)3(SiO4)4 · H2O
Common Impurities:
TR,Ce,Fe,Mn,Sr,F,Cl

Crystallography of HarkeriteHide

Crystal System:
Trigonal
Class (H-M):
3m (3 2/m) - Hexagonal Scalenohedral
Space Group:
R3m
Cell Parameters:
a = 18.131 Å
α = 33.46°
Unit Cell V:
1,613.62 ų (Calculated from Unit Cell)
Morphology:
Pseudo-octahedrons.
Comment:
Pseudo-isometric Fd3m. Hexagonal cell-parameters: a = 10.439, c = 51.303 Å (Z =3).

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
5.22 (70)
3.39 (60)
3.01 (60)
2.84 (60)
2.61 (100)
2.13 (80)
1.84 (90)
1.51 (70)
Comments:
10-0465

Type Occurrence of HarkeriteHide

Other Language Names for HarkeriteHide

German:Harkerit
Simplified Chinese:碳硼硅钙镁石
Spanish:Harkerita

Common AssociatesHide

CalciteCaCO3
ChalcociteCu2S
DiopsideCaMgSi2O6
MagnetiteFe2+Fe3+2O4
MonticelliteCaMgSiO4
PhlogopiteKMg3(AlSi3O10)(OH)2
Associated Minerals Based on Photo Data:
Calcite6 photos of Harkerite associated with Calcite on mindat.org.
Phlogopite4 photos of Harkerite associated with Phlogopite on mindat.org.
Magnetite3 photos of Harkerite associated with Magnetite on mindat.org.
Monticellite3 photos of Harkerite associated with Monticellite on mindat.org.
Malachite2 photos of Harkerite associated with Malachite on mindat.org.
Hydromagnesite2 photos of Harkerite associated with Hydromagnesite on mindat.org.
Cuspidine2 photos of Harkerite associated with Cuspidine on mindat.org.
Löllingite1 photo of Harkerite associated with Löllingite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

6.AB.05HambergiteBe2(BO3)(OH)Orth. mmm (2/m 2/m 2/m) : Pbca
6.AB.10BerboriteBe2(BO3)(OH,F) · H2OTrig.
6.AB.15JeremejeviteAl6(BO3)5(F,OH)3Hex. 6/m : P63/m
6.AB.20Warwickite(Mg,Ti,Fe,Cr,Al)2O(BO3)Orth.
6.AB.20YuanfuliiteMg(Fe3+,Al)O(BO3)Orth.
6.AB.25KarliteMg7(BO3)3(OH,Cl)5Orth.
6.AB.30Azoproite(Mg,Fe2+)2(Fe3+,Ti,Mg)(BO3)O2Orth.
6.AB.30BonaccorditeNi2Fe3+(BO3)O2Orth.
6.AB.30FredrikssoniteMg2(Mn3+,Fe3+)(BO3)O2Orth.
6.AB.30LudwigiteMg2Fe3+(BO3)O2Orth.
6.AB.30VonseniteFe2+2Fe3+(BO3)O2Orth.
6.AB.35Pinakiolite(Mg,Mn2+)2Mn3+(BO3)O2Mon.
6.AB.40BlatteriteSb5+(Mn3+,Fe3+)9(Mn2+,Mg)35(BO3)16O32Orth. mmm (2/m 2/m 2/m) : Pnnm
6.AB.40ChestermaniteMg2(Fe3+,Mn3+,Al,Sb3+)(BO3)O2Orth.
6.AB.40Orthopinakiolite(Mg,Mn2+)2Mn3+(BO3)O2Orth.
6.AB.40Takéuchiite(Mg,Mn2+)2(Mn3+,Fe3+)(BO3)O2Orth.
6.AB.45Hulsite(Fe2+,Mg)2(Fe3+,Sn)(BO3)O2Mon.
6.AB.45Magnesiohulsite(Mg,Fe2+)2(Fe3+,Sn,Mg)(BO3)O2Mon.
6.AB.45Aluminomagnesiohulsite(Mg,Fe2+)2(Al,Mg,Sn)(BO3)O2Mon. 2/m
6.AB.50FluoboriteMg3(BO3)(F,OH)3Hex.
6.AB.50HydroxylboriteMg3(BO3)(OH)3Hex. 6/m : P63/m
6.AB.55ShabyniteMg5(BO3)(OH)5(Cl,OH)2 · 4H2OMon.
6.AB.55WightmaniteMg5(BO3)O(OH)5 · 2H2OMon.
6.AB.60GaudefroyiteCa4Mn3+2-3(BO3)3(CO3)(O,OH)3Hex.
6.AB.65SakhaiteCa12Mg4(BO3)7(CO3)4(OH)2ClIso. m3m (4/m 3 2/m) : Fd3m
6.AB.75Pertsevite-(F)Mg2(BO3)(F,OH)Orth. mm2 : Pna21
6.AB.75Pertsevite-(OH)Mg2(BO3)(OH)Orth. mmm (2/m 2/m 2/m) : Pnma
6.AB.80JacquesdietrichiteCu2(H2BO3)(OH)3Orth. mmm (2/m 2/m 2/m) : Pmna
6.AB.85PainiteCaZrAl9(BO3)O15Hex.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

17.5.1ManandoniteLi2Al4(Si2AlB)O10(OH)8Orth.
17.5.2ReedmergneriteNaBSi3O8Tric.
17.5.3SearlesiteNa(H2BSi2O7)Mon. 2 : P21
17.5.4OleniteNa(Al3)Al6(Si6O18)(BO3)3O3(OH)Trig.
17.5.5ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
17.5.6KalborsiteK6Al4BSi6O20(OH)4ClTet.
17.5.7BoromuscoviteKAl2(BSi3O10)(OH)2Mon.
17.5.8PoudretteiteKNa2B3Si12O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
17.5.9LiddicoatiteCa(Li2Al)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
17.5.10DatoliteCaB(SiO4)(OH)Mon. 2/m : P21/b
17.5.11DanburiteCaB2Si2O8Orth. mmm (2/m 2/m 2/m)
17.5.12HowliteCa2B5SiO9(OH)5Mon. 2/m : P21/b
17.5.13BakeriteCa4(H5B5Si3O20)Mon. 2/m : P21/b
17.5.14OyeliteCa10Si8B2O29 · 12.5H2OOrth.
17.5.15KornerupineMg3Al6(Si,Al,B)5O21(OH)Orth. mmm (2/m 2/m 2/m)
17.5.17SerendibiteCa4[Mg6Al6]O4[Si6B3Al3O36]Tric. 1 : P1
17.5.18Stillwellite-(Ce)(Ce,La,Ca)BSiO5
17.5.19Tadzhikite-(Ce)Ca4Ce3+2Ti◻(B4Si4O22)(OH)2Mon.
17.5.20Melanocerite-(Ce)(Ce,Ca)5(SiO4,BO4)3(OH,0)Hex.
17.5.21Okanoganite-(Y)(Na,Ca)3(Y,Ce)12Si6B2O27F14
17.5.22Tritomite-(Ce)Ce5(SiO4,BO4)3(OH,O)
17.5.23Tritomite-(Y)Y5(SiO4,BO4)3(O,OH,F)
17.5.24Cappelenite-(Y)Ba(Y,Ce)6Si3B6O24F2Trig. 3 : P3
17.5.25Dumortierite(Al,Fe3+)7(SiO4)3(BO3)O3Orth. mmm (2/m 2/m 2/m)
17.5.26Holtite(Ta0.60.4)Al6BSi3O18(O,OH)2.25Orth. mmm (2/m 2/m 2/m) : Pnma
17.5.27DraviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
17.5.28 FerridraviteNaFe3+3(Mg2Fe3+4)(Si6O18)(BO3)3(OH)3O
17.5.29Axinite-(Mg)Ca2MgAl2BSi4O15OHTric.
17.5.30Uvite SeriesCa(Mg3)MgAl5(Si6O18)(BO3)3(OH)3(F/OH)Trig. 3m : R3m
17.5.31GarrelsiteBa3NaSi2B7O16(OH)4Mon.
17.5.32TienshaniteKNa3Na6Ca2Ba6Mn6(Ti4+,Nb)6B12Si36O114(O,OH,F)11Hex. 6/m : P6/m
17.5.33LeucospheniteBaNa4Ti2B2Si10O30Mon.
17.5.34TaramelliteBa4(Fe3+,Ti,Fe2+,Mg)4(B2Si8O27)O2ClxOrth. mmm (2/m 2/m 2/m) : Pmmn
17.5.35TitantaramelliteBa4(Ti,Fe3+,Fe2+,Mg)4(B2Si8O27)O2ClxOrth.
17.5.36NagashimaliteBa4(V,Ti)4B2Si8O27(O,OH)2ClOrth. mmm (2/m 2/m 2/m) : Pmmn
17.5.37Chromium-draviteNa(Mg3)Cr3+6(Si6O18)(BO3)3(OH)3(OH)Trig.
17.5.38WawayandaiteCa6Mn2BBe9Si6O23(OH,Cl)15Mon.
17.5.39Werdingite(Mg,Fe)2Al14Si4B4O37Tric.
17.5.40Axinite-(Mn)Ca2Mn2+Al2BSi4O15(OH)Tric. 1 : P1
17.5.41AxiniteTric.
17.5.42TinzeniteCa2Mn2+4Al4[B2Si8O30](OH)2Tric.
17.5.44SchorlNa(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
17.5.45Fluor-buergeriteNa(Fe3+3)Al6(Si6O18)(BO3)3O3FTrig. 3m : R3m
17.5.46FeruviteCa(Fe2+)3MgAl5(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
17.5.47Axinite-(Fe)Ca2Fe2+Al2BSi4O15OHTric. 1 : P1
17.5.48HomiliteCa2(Fe2+,Mg)B2Si2O10Mon. 2/m : P21/b
17.5.49Grandidierite(Mg,Fe2+)(Al,Fe3+)3(SiO4)(BO3)O2Orth. mmm (2/m 2/m 2/m)
17.5.50Hyalotekite(Pb,Ba,K)4(Ca,Y)2(B,Be)2(Si,B)2Si8O28(F,Cl)Tric. 1 : P1
17.5.51Hellandite-(Y)(Ca,REE)4Y2Al◻2(B4Si4O22) (OH)2Mon.

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.

References for HarkeriteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Tilley, C.E. (1948): Dolomite contact skarns of the Broadford area, Skye: a preliminary note. Geological Magazine 85, 213-218.
Tilley, C.E. (1951): The zoned contact-skarns of the Broadford area, Skye: a study of boron-fluorine metasomatism in dolomites. Mineralogical Magazine 29, 621-666. [Abs. in American Mineralogist 37 (1952) 359]
Davies, W.O., Machin, M.P. (1970): Isomorphous replacements in harkerite and the relation of sakhaite to harkerite. The Canadian Mineralogist 10, 689-695.
Giuseppetti, G., Mazzi, F., Tadini, C. (1977): The crystal structure of harkerite. American Mineralogist 62, 263-272.
Grew, E.S., Yates, M.G., Adams, P., Kirkby, R., and Wiedenbeck, M. (1999): Harkerite from the Crestmore Quarry, Riverside County, California and Cascade Slide, Adirondack Mountains, New York: A contrast in metamorphic pressure. Canadian Mineralogist, 37, 277-296.
Grew, E.S., and Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002), Reviews in Mineralogy, v. 33, Mineralogical Society of America.

Internet Links for HarkeriteHide

Localities for HarkeriteHide

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.
China
 
  • Guangdong Province
    • Heyuan Prefecture
      • Lianping Co.
Wang, S. (1983): Bull. lnst. Min. Deposits, Chinese Acad. Geol. Sci. 9, 72; Lianshun Feng (1986): Geology and Prospecting 22(3), 21-27
Italy
 
  • Latium
    • Rome Province
Barbieri, M., Cozzupoli, D., Federico, M., Fornaseri, M., & Tolomeo, L. (1973). Harkerite negli inclusi del peperino dei Colli Albani. Periodico di Mineralogia, 42 (3), 687-688; Barbieri, M., Cozzupoli, D., Federico, M., Fornaseri, M., Merlino, S., Orlandi, P., & Tolomeo, L. (1977). Harkerite from the Alban Hills, Italy. Lithos, 10, 133-141.
Christof Schäfer collection
Kazakhstan
 
  • Almaty
    • Sarkand
      • Sayak Cu ore field
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
Namibia
 
  • Otjozondjupa Region
    • Grootfontein District
      • Kombat
Dunn, P.J. (1991), Rare minerals of the Kombat Mine, Mineralogical Record: 22(6): 421-425.
Russia
 
  • Eastern-Siberian Region
    • Prebaikalia (Pribaikal'e)
      • Irkutskaya Oblast'
        • Lake Baikal area
Koneva A.A., Uschapovskaya Z.F. (1991) On harkerite and bultfonteinite from skarns of Tazheran alkaline massif, - Geologiya i Geofizika, 2, p.74-78.
    • Sakha Republic (Yakutia)
      • Polar Yakutia
        • Dogdo River Basin
          • Tas-Khayakhtakh Range
Aleksandrov, S.M. (1998): Geochemistry of skarn and ore formation in dolomites. VSP (Utrecht, Tokyo), 300 pp.
Sweden
 
  • Värmland
    • Filipstad
      • Nordmark Odal Field (Nordmarksberg)
Holtstam, D. & Langhof, J. (1995): Metamorphic harkerite from Nordmarks odalfält, Värmland, Sweden. GFF 117, 151-152.
UK
 
  • Scotland
    • Highland
      • Isle of Skye
        • Broadford
          • Kilchrist
          • Torrin
C.E. Tilley: Mineralogical Magazine 29:621-667 (1951)
USA
 
  • California
    • Riverside Co.
      • Crestmore
Grew, et al (1999) Canadian Mineralogist: 37: 277-296; [http://www.mineralogicalassociation.ca/doc/abstracts/cm2_Vol37_Avr99.pdf
  • New York
    • Essex Co.
      • Keene Township
        • Cascade Mountain
Canadian Mineralogist (1999): 37: 277-296; Grew e al (1999), Canadian Mineralogist: 37: 277-296.; Contrib. Mineral. Petrol. 74, 143-152 (1980)
Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2018, except where stated. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: October 23, 2018 06:22:11 Page generated: October 7, 2018 08:45:00
Go to top of page