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cell paramenters

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Journal Article
Published: 01 September 2008
South African Journal of Geology (2008) 111 (2-3): 225–228.
... as the anonymous donor of the chromite concentrate. The referees Audrey Sokiecki and Leonie Reyneke are thanked for reviewing the manuscript and their constructive comments. The McMaille V4.00 program was used for refinement of unit cell constants and calculation of d-spacings. The unit cell paramenters...
FIGURES
Journal Article
Published: 17 June 2022
Mineralogical Magazine (2022) 86 (6): 883–890.
... and Na 0.97 Fe 0.68 Al 0.33 As 2.00 O 9 H 4.01 , respectively. Nafeasite is monoclinic, space group C 2, with cell parameters: a = 18.6876(16), b = 8.6769(7), c = 14.8100(10) Å, β = 105.238 (5)°, V = 2317.0(3) Å 3 and Z = 12. The structure, refined to R 1 = 5.03% for 5979 I o > 2σ I reflections...
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Journal Article
Published: 15 January 2024
Mineralogical Magazine (2024) 88 (2): 195–202.
... the empirical formula and unit-cell volume refined from the single-crystal X-ray diffraction (XRD) data is 2.31 g/cm 3 . Natromelansonite is optically biaxial (+), α = 1.510(2), β = 1.516(2), γ = 1.524(3), 2V(meas.) = 86(3)° (from a spindle-stage extinction curve) and 2V(calc.) = 82°. Chemical data...
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Journal Article
Published: 01 November 2010
American Mineralogist (2010) 95 (11-12): 1650–1656.
... is constructed. This new curve is consistent with the significant cell parameter changes accompanying the Mg-Ca cation disorder in dolomite, and it can help the characterization of the MgCO 3 content of both natural and synthetic magnesian calcite and disordered dolomite, especially for the mineral mixtures...
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Journal Article
Published: 01 December 2008
The Canadian Mineralogist (2008) 46 (6): 1577–1591.
... group P 4 2 /n . A room-temperature structure, obtained with synchrotron high-resolution powder X-ray-diffraction (HRPXRD) data, has unit-cell parameters a 12.06503(1), c 7.58360(1) Å, and V 1103.906(2) Å 3 . Moreover, the average bond-distances < T 1–O>, < T 2–O> and < T 3–O...
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Journal Article
Published: 01 February 1971
Bulletin of the Seismological Society of America (1971) 61 (1): 27–53.
... in complex geological structures. The problem of computing ray paths in complex geological structures can be resolved by separating the structure into cells of arbitrary dimensions. The cell dimensions are chosen so that the structure contained within each can be approximated by a sequence of planes...
Journal Article
Published: 01 December 2002
The Canadian Mineralogist (2002) 40 (6): 1597–1608.
...)(2̅21, 3̅12), 2.134(70)(202,221). Unit-cell parameters from the powder-diffraction data are: a 9.074(5), b 6.239(3), c 7.406(4), β 116.60(3)°. The nomenclature of members of the tsumcorite group with Me (1) = Ca and X = As (lotharmeyerite subgroup) is based on the occupant of the Me (2) site...
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Journal Article
Published: 27 January 2014
Petroleum Geoscience (2014) 20 (1): 109–123.
... scales, from millimetre-scale (porosity) to kilometre-scale (basin evolution) ( Eaton 2006 ), although the ability to explicitly represent small-scale features is limited by the size of the geological model cells. Attempts to assign relatively large cells (tens of metres on a side) with small-scale...
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Journal Article
Published: 01 December 1991
Bulletin of Canadian Petroleum Geology (1991) 39 (4): 315–331.
... biomarqueurs (particulièrement celle des stéranes) indiquent que ces huiles sont dérivées d’au moins deux faciès différents de roches-mères. Quatre des huiles ont des distributions de stéranes similaires à celles observées dans les extraits des échantillons de la formation Albert et sont dérivées localement...