Åkermanite R061085

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Record 58 of 4216  

Name: Åkermanite
RRUFF ID: R061085
Ideal Chemistry: Ca2MgSi2O7
Locality: Kovdor, Kola Peninsula, Russia
Source: Michael Scott S101598 [view label]
Owner: Michael Scott
Description: Dark blue coarsely crystalline massive associated with green diopside
Status: The identification of this mineral has been confirmed by X-ray diffraction and chemical analysis
Mineral Group: [ Melilite (7) ]
Quick search: [ All Åkermanite samples (2) ]
RRUFF ID: R061085.2
Sample Description: Microprobe Fragment
Measured Chemistry: (Ca1.78Na0.22)Σ=2(Mg0.70Al0.22Fe2+0.08)Σ=1Si2.00O7
Microprobe Data File: [ Download Excel File ]
Sample Description: Sample is oriented and mounted on a pin.
Pin ID: M00203
Orientation: Laser parallel to  a*  (1 0 0).     Fiducial mark perpendicular to laser is parallel to  c   [0 0 1].

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RRUFF ID: R061085
Sample Description: Unoriented sample
Instrument settings: Thermo Almega XR 532nm @ 100% of 150mW
RRUFF ID: R061085.1
Sample Description: Powder
Cell Refinement Output: a: 7.7913(3)Å    b: 7.7913(3)Å    c: 5.0147(1)Å
alpha: 90°    beta: 90°    gamma: 90°   Volume: 304.41(2)Å3    Crystal System: tetragonal
  File Type Information Close
Calculated diffraction file.

  File Type Information Close
Output file from the Bruker D8 Advance instrument. Includes device headers and XY data.

  File Type Information Close
Output file from the Bruker D8 Advance instrument. Includes device headers and XY data.

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REFERENCES for Åkermanite

American Mineralogist Crystal Structure Database Record: [view record]

Anthony J W, Bideaux R A, Bladh K W, and Nichols M C (1990) Handbook of Mineralogy, Mineral Data Publishing, Tucson Arizona, USA, by permission of the Mineralogical Society of America. [view file]

Vogt I H L (1884) Studier over slagger. I, Kongliga Svenska Vetenskaps-Akademiens Handlingar, 9, 3-302   [view file]

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   [view file]

Mokeeva V, Makarov E (1979) Isomorph in melilites: refining of crystal structure of akermanite and intermediate melilite, Geokhimiya, 10, 1541-1544

Kimata M, Ii N (1981) The crystal structure of synthetic akermanite, Ca2MgSi2O7, Neues Jahrbuch für Mineralogie, Monatshefte, 1981, 1-10

Hemingway B S, Evans H T, Nord G L, Haselton H T, Robie R A, McGee J J (1986) Åkermanite: phase transitions in heat capacity and thermal expansion, and revised thermodynamic data, The Canadian Mineralogist, 24, 425-434   [view file]

Sharma S K, Yoder H S, Matson D W (1988) Raman study of some melilites in crystalline and glassy states, Geochimica et Cosmochimica Acta, 52, 1961-1967

Shannon R D, Iishi K, Allik T H, Rossman G R, Liebertz J (1992) Dielectric constants of BaO and melilites and the oxide additivity rule, European Journal of Mineralogy, 4, 1241-1249

Swainson I P, Dove M T, Schmahl W W, Putnis A (1992) Neutron powder diffraction study of the akermanite-gehlenite solid solution series, Physics and Chemistry of Minerals, 19, 185-195

Kusaka K, Ohmasa M, Hagiya K, Iishi K, Haga N (1998) On variety of the Ca coordination in the incommensurate structure of synthetic iron-bearing åkermanite, Ca2(Mg0.55Fe0.45)Si2O7, Mineralogical Journal, 20, 47-58   [view file]

Shannon R D, Shannon R C, Medenbach O, Fischer R X (2002) Refractive index and dispersion of fluorides and oxides, Journal of Physical and Chemical Reference Data, 31, 931-970   [view file]

Gemmi M, Merlini M, Cruciani G, Artioli G (2007) Non-ideality and defectivity of the åkermanite-gehlenite solid solution: An X-ray diffraction and TEM study, American Mineralogist, 92, 1685-1694   [view file]

Merlini M, Gemmi M, Cruciani G, Artioli G (2008) High-temperature behaviour of melilite: in situ X-ray diffraction study of gehlenite-åkermanite-Na melilite solid solution, Physics and Chemistry of Minerals, 35, 147-155

Merlini M, Gemmi M, Hanfland M, Crichton W (2009) High-pressure behavior of akermanite and gehlenite and phase stability of the normal structures in melelites, American Mineralogist, 94, 704-709   [view file]