Help mindat.org|Log In|Register|
Home PageMindat NewsThe Mindat ManualHistory of MindatCopyright StatusManagement TeamContact UsAdvertise on Mindat
Donate to MindatSponsor a PageSponsored PagesTop Available PagesMindat AdvertisersAdvertise on MindatThe Mindat Store
Minerals by PropertiesMinerals by ChemistryRandom MineralSearch by minIDLocalities Near MeSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportAdd Glossary Item
StatisticsMember ListBooks & MagazinesMineral Shows & EventsThe Mindat DirectoryHow to Link to MindatDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Åkermanite

This page is currently not sponsored. Click here to sponsor this page.
Anders Richard Åkerman (1837-1922)
Formula:
Ca2Mg(Si2O7)
System:
Tetragonal
Colour:
Colorless, yellowish ...
Hardness:
5 - 6
Member of:
Name:
First described from samples of slags from furnace iron production found at 3 furnace localities: Hofors, Löfsjöen and Mölnbo, Sweden (Vogt 1884).
Named by the Norwegian geologist, professor Johan Herman Lie Vogt (1858-1932) in honor of Anders Richard Åkerman(1837-1922), Swedish metallurgist. During his comprehensive study of the mineralogy of slag products, Vogt discovered a new Ca-Mg-silicate, and named the mineral Åkermanit. Åkerman had kindly given J.H.L.Vogt access to Stockholms Bergskolas large collection of slags. It was in samples from this collection Vogt discovered the mineral.

Classification of Åkermanite

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
9.BB.10

9 : SILICATES (Germanates)
B : Sorosilicates
B : Si2O7 groups, without non-tetrahedral anions; cations in tetrahedral [4] and greater coordination
55.4.1.1

55 : SOROSILICATES Si2O7 Groups,Generally with no Additional Anions
4 : Si2O7 Groups, Generally with No Additional Anions with cations in [8] and lower coordination
14.6.9

14 : Silicates not Containing Aluminum
6 : Silicates of Ca with alkali or Mg or both
mindat.org URL:
http://www.mindat.org/min-70.html
Please feel free to link to this page.

Occurrences of Åkermanite

Geological Setting:
A product of contact metamorphism of siliceous limestones and dolostones, and in rocks of the sanidinite facies. Also forms from alkalic magmas rich in calcium.

Physical Properties of Åkermanite

Vitreous, Resinous
Diaphaneity (Transparency):
Transparent, Translucent
Colour:
Colorless, yellowish gray, green, brown
Comment:
in thin section, colorless to yellow
Streak:
white
Hardness (Mohs):
5 - 6
Tenacity:
Brittle
Cleavage:
Distinct/Good
Distinct on {001} , poor on {110}
Fracture:
Irregular/Uneven, Conchoidal

Crystallography of Åkermanite

Crystal System:
Tetragonal
Class (H-M):
4 2m - Scalenohedral
Space Group:
P4 21m
Cell Parameters:
a = 7.8288(8) Å, c = 5.0052(2) Å
Ratio:
a:c = 1 : 0.639
Unit Cell Volume:
V 306.77 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Crystals short prismatic to thin tabular, which may resemble squashed, octahedrally-modified cubes; granular, massive.
Twinning:
On {100} and 001 , cruciform.
Comment:
Synthetic material

Optical Data of Åkermanite

Type:
Uniaxial (+)
RI values:
nω = 1.632 nε = 1.640
Max Birefringence:
δ = 0.008
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate

Chemical Properties of Åkermanite

Formula:
Ca2Mg(Si2O7)
Essential elements:
All elements listed in formula:

Relationship of Åkermanite to other Species

Series:
Forms a series with Gehlenite (see here)
Member of:
Other Members of Group:
Alumoåkermanite(Ca,Na)2(Al,Mg,Fe2+)(Si2O7)
Ferri-gehleniteCa2Fe3+AlSiO7
GehleniteCa2Al(AlSiO7)
GugiaiteCa2Be(Si2O7)
HardystoniteCa2Zn(Si2O7)
OkayamaliteCa2B(BSiO7)
9.BB.10CebolliteCa5Al2(SiO4)3(OH)4
9.BB.10GehleniteCa2Al(AlSiO7)
9.BB.10GugiaiteCa2Be(Si2O7)
9.BB.10HardystoniteCa2Zn(Si2O7)
9.BB.10Jeffreyite(Ca,Na)2(Be,Al)(Si2O7,HSi2O7)
9.BB.10OkayamaliteCa2B(BSiO7)
9.BB.10Alumoåkermanite(Ca,Na)2(Al,Mg,Fe2+)(Si2O7)
9.BB.15BaryliteBe2Ba(Si2O7)
9.BB.15Barylite-1OBe2Ba(Si2O7)
9.BB.20AndrémeyeriteBaFe22+(Si2O7)
14.6.1CombeiteNa2Ca2(Si6O18)0.5
14.6.2PectoliteNaCa2(HSi3O9)
14.6.3Pectolite-M2abcNaCa2[HSi3O9]
14.6.4DenisoviteCa2(K,Na)Si3O8(F,OH)2
14.6.5TokkoiteK2Ca4Si7O17(O,OH,F)4
14.6.6MountainiteKNa2Ca2[Si8O19(OH)] · 6H2O
14.6.7RhodesiteKHCa2Si8O19 · 5H2O
14.6.8MiseriteK1.5-x(Ca,Y,REE)5(Si6O15)(Si2O7)(OH,F)2 · yH2O
14.6.10MonticelliteCaMgSiO4
14.6.11MerwiniteCa3Mg(SiO4)2
14.6.12DiopsideCaMgSi2O6
14.6.13Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2

Other Names for Åkermanite

Name in Other Languages:

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.

References for Åkermanite

Reference List:
Vogt, I. H. L. (1884): Studier over slagger. I. Kongliga Svenska Vetenskaps-Akademiens Handlingar 9, 3-302

Vogt, I. H. L. (1890): Die mineralien der melilithgruppe - nämlich gehlenit, melilith und ein neues tetragonales, nicht Al2O3-führendes (Ca,Mg)O-silikat (Åkermanit), nebst zwischengliedern. Archiv for Mathematik og Naturvidenskab 13, 310-402

Christie, O.H.J. (1961) On sub-solidus relations of silicates; IV. The system åkermanite-sodium-gehlenite and gehlenite-sodium-gehlenite. Norsk Geologisk Tidsskrift: 42: 31-44.

Valley, J.W. and Essene, E.J. (1979) Vesuvianite, akermanite, monticellite and wollastonite equlibria and high X H2O/CO2 at Cascade slide, Mt Marcy Quad, Adirondack Mts. EOS: 60: 423.

Neues Jahrbuch für Mineralogie, Monatshefte (1981): 1-10.

Courtial, P., Téqui, C., and Richet, P. (2000) Thermodynamics of diopside, anorthite, pseudowollastonite, CaMgGeO4 olivine, and åkermanite up to near the melting point. Physics and Chemistry of Minerals: 27: 242-250.

Internet Links for Åkermanite

Localities for Åkermanite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Austria
 
  • Tyrol
    • North Tyrol
      • Inn valley
        • Brixlegg - Schwaz area
Kolitsch, U. (2013): 1799) Anglesit, Brochantit, Calcit, Callaghanit, Connellit, Cuprit, Diopsid, Elyit, Forsterit, Kupfer, Lithargit, Magnesiochromit, Malachit, Monohydrocalcit, Phoenicochroit, Rouait und Willemit in Schlacken der Montanwerke Brixlegg, Tirol. Pp. 111-114 in Niedermayr, G. et al. (2013): Neue Mineralfunde aus Österreich LXII. Carinthia II, 203./123., 91-146.
Canada
 
  • Newfoundland and Labrador
    • Labrador
OWENS, B.E. & KREMSER, P.T. (2010) Åkermanite breakdown to cuspidine-bearing sympectite in a calc-silicate xenolith, Kiglapait intrusion, Labrador, Canada. Canadian Mineralogist 48, 809-819.
Am Min 85:1595–1605, (2000)
  • Québec
    • Laurentides
      • Deux-Montagnes RCM
        • Oka
          • Oka complex
Sabina (1968)
        • Saint-Joseph-du-Lac
          • Oka complex
Sabina (1968)
China
 
  • Shaanxi Province
    • Hanzhong Prefecture
      • Ningqiang Co.
Xiyue Wang, Huimin Zhang, Sichao Wang, and Yuezhen Wu (1987): Acta Petrologica et Mineralogica 6(4), 296-306
Czech Republic
 
  • Bohemia (Böhmen; Boehmen)
    • Central Bohemia Region
      • Kutná Hora (Kuttenberg)
        • Poličany
          • Vrchlice river valley
Pauliš P. Mineralogické lokality okolí Kutné Hory. Kuttna, Kutná Hora 1999. ISBN 80-902719-0-1.
    • Ústí Region
      • Duchcov (Dux)
Žáček V., Skála R., Chlupáčová M., Dvořák Z. 2005: Ca-Fe3+-rich, Si-undersaturated buchite from Želénky, North-Bohemian Brown Coal Basin, Czech Republic. Eur. J. Mineral., 17, 623-633
Germany
 
  • Baden-Württemberg
    • Kaiserstuhl
      • Schelingen
        • Orberg - Badberg area
Keller, J., Williams T. (1995): Niocalite and Wöhlerite from the alkaline and carbonatite rocks at Kaiserstuhl, Germany, Mineralogical Magazine, Vol.: 59, 561-566
  • Lower Saxony
    • Harz
      • Goslar
        • Astfeld
No reference listed
  • North Rhine-Westphalia
    • Aachen
      • Stolberg
Blaß, G. & Graf, H. W. (1995): Neufunde von Schlackenhalden in der nördlichen Eifel (II). Mineralien-Welt, 6 (3), 28-31.
Rolf Luetcke specimen; Blaß, G. & Graf, H. W. (1995): Neufunde von Schlackenhalden in der nördlichen Eifel (II). Mineralien-Welt, 6 (3), 28-31.
    • Sauerland
      • Iserlohn
        • Letmathe
BLAß, G. & GRAF, H. W. (1995): Neufunde von bekannten Fundstellen (13). Mineralien-Welt 6 (3), 47-51.
  • Rhineland-Palatinate
    • Eifel
      • Hillesheim
in the collection of Christof Schäfer
      • Mayen
        • Ettringen
          • Bellerberg volcano
[Blass, G., Graf, H.W., Neue Mineralienfunde aus der Eifel und dem Siegerland, Mineralien-Welt 10/3, 23, 1999] [A. Wittern: Mineralfundorte in Deutschland, Schweizerbart (Stuttgart), 2001]
            • Southern lava flow
              • Mayener Feld
Christof Schäfer
Iraq
 
  • Qala-Diz (Qala-Dizeh; Qala-Diza)
    • Hero
Israel
 
  • Negev
Gross, S. (1977): The Mineralogy of the Hatrurim Formation, Israel. Geological Survey of Israel, Bulletin no. 70, 80 pp.
Italy
 
  • Campania
    • Naples Province
      • Somma-Vesuvius Complex
[Lapis 1994:5 p.13-23,58]
  • Latium
    • Rome Province
      • Sacrofano Caldera
        • Campagnano di Roma
        • Sacrofano
Vik Vanrusselt Collection
  • Umbria
    • Perugia Province
      • Spoleto
Stoppa F., Sharygin V.V., 2009. Melilitolite intrusion and pelite digestion by high temperature kamafugitic magma at Colle Fabbri, Spoleto, Italy. Lithos, 112, 306-320.
Japan
 
  • Honshu Island
    • Chugoku region
      • Shimane Prefecture
        • Hamada City
The Mineral Species of Japan (5th ed) Matsubara
Namibia
 
  • Otjikoto Region (Oshikoto)
    • Tsumeb
Ettler, V., Johan, Z., Kříbek, B., Šebek, O. & Mihaljevič, M. (2009): Mineralogy and environmental stability of slags from the Tsumeb smelter, Namibia. Applied Geochemistry 24, 1-15.
Norway
 
  • Telemark
    • Skien
Jamtveit B., Dahlgren S. and Austrheim H. (1997): High-grade contact metamorphism of calcareous rocks from the Oslo Rift, Southern Norway. American Mineralogist. 82 : 1241 - 1254
Romania
 
  • Brașov Co.
    • Racoş Commune
Szakáll, S., Kristály, F., 2010. Mineralogy of Székelyland, Eastern Transylvania, Romania. Sfântu Gheorghe-Miercurea Ciuc-Târgu Mureş. 2010.
  • Harghita Co.
    • Odorheiu Secuiesc (Székelyudvarhely; Oderhellen)
      • Racoş (Racoşu de Jos)
Szakáll, S. & Kristály, F., Eds. (2010): Mineralogy of Székelyland, Eastern Transylvania, Romania. Csík County Nature and Conservation Society, Miercurea-Ciuc, Romania, 321 pp.
Russia
 
  • Eastern-Siberian Region
    • Krasnoyarsk Territory (Krasnoyarsk Kray; Krasnoyarskii Krai)
      • Maimecha and Kotui Rivers Basin
Pavel M. Kartashov data
  • Northern Region
    • Murmanskaja Oblast'
      • Kola Peninsula
www.koeln.netsurf.de/~w.steffens/khib.htm
Kalinkina, E. V., Kalinkin, A. M., Forsling, W., & Makarov, V. N. (2001). Sorption of atmospheric carbon dioxide and structural changes of Ca and Mg silicate minerals during grinding: II. Enstatite, åkermanite and wollastonite. International journal of mineral processing, 61(4), 289-299.
South Africa
 
  • Mpumalanga Province
    • Eastern Bushveld Complex
      • Lydenburg
Minerals of South Africa
  • Northern Cape Province
    • Kalahari manganese field
      • Hotazel
Von Bezing, K. L. et al. (1991) The Kalahari manganese field: An Update, Mineralogical Record 22(4) 279-302;
Sweden
 
  • Medelpad
    • Timrå
Sandström, F., Binett, T., Wiklund, C. & Vikström, J. (2010): Alnöområdets geologi och mineralogi. Litiofilen. 27 (2) :14-42
UK
 
  • Northern Ireland
    • Co. Antrim
      • Glenoe
P. A. Sabine, M. T. Styles and B. R. Young (1985) The Nature and Paragenesis of Natural Bredigite and Associated Minerals from Carneal and Scawt Hill, Co. Antrim. Mineralogical Magazine 49:663-670.
Tindle, A.G. (2008) Minerals of Britian and Ireland
    • North West Highlands
      • Ardnamurchan
Handbook of Mineralogy - Anthony, Bideaux, Bladh, Nichols; Mineralogical Magazine 1965 34 : 1-15.
USA
 
  • Colorado
    • Gunnison Co.
      • White Earth District (Powderhorn District)
"Minerals of Colorado, updated & revised", p. 17, by Eckel, Edwin B., 1997
  • New York
    • Essex Co.
      • Keene
        • Cascade Mountain
EOS: 60: 423.; Contrib. Mineral. Petrol. 74, 143-152 (1980)
  • Texas
    • Culberson Co.
      • Apache Peak area
Rocks & Minerals: 66(3): 196-224.
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 1993-2015, 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: June 30, 2015 04:43:55 Page generated: June 27, 2015 22:26:17