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fairchildite

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Journal Article
Published: 01 February 2011
Russ. Geol. Geophys. (2011) 52 (2): 208–219.
... composition from essentially carbonate to carbonate–silicate–oxide. Their main components are dolomite, calcite, fluorapatite, picroilmenite, phlogopite, magnesite, and brucite. In one multiphase inclusion, a rare carbonate, fairchildite K 2 Ca(CO 3 ) 2 , was found in the central part of a large magnetite...
FIGURES | View All (8)
Journal Article
Published: 01 October 1990
American Mineralogist (1990) 75 (9-10): 1147–1150.
...Duncan McKie Abstract Solid solutions with the fairchildite structure extend from 100 to 42 mol% K 2 Ca(CO 3 ) 2 at high temperature, whereas at low temperature there is a very restricted solid solution between buetschliite and eitelite. Fairchildite solid solution is in equilibrium with nearly...
Journal Article
Published: 01 December 1965
The Canadian Mineralogist (1965) 8 (3): 377–381.
Journal Article
Published: 01 December 1958
The Canadian Mineralogist (1958) 6 (2): 290–291.
...Kenneth Ralph Dawson; Ann P. Sabina Abstract Fairchildite (K 2 CO 3 .CaCO 3 ) and buetschliite (3K 2 CO 3 .6H 2 O) have been identified from the trunk of a burned hickory tree near Deseronto, Ontario. Material was collected from the top of the burned stump and from the ground beneath the fallen...
Journal Article
Published: 01 December 1947
American Mineralogist (1947) 32 (11-12): 607–624.
...Charles Milton; Joseph Axelrod Abstract Stones found in the trunks of standing partly burned forest trees are produced by fusion and ensuing crystallization of the ash of the wood. Freshly formed stones consist essentially of a new mineral fairchildite, anhydrous potassium calcium carbonate, K 2 CO...
Image
Multiphase inclusion with potassium–calcium carbonate and the EDS spectrum ...
Published: 01 February 2011
Fig. 7. Multiphase inclusion with potassium–calcium carbonate and the EDS spectrum of fairchildite in the center of magnetite from the Loolekop phoscorite. Fc, Fairchildite. See Figs. 3 – 6 for the rest of the notation.
Journal Article
Published: 01 July 2016
American Mineralogist (2016) 101 (7): 1584–1595.
.... In general, smaller branches and bark showed higher concentrations of ash-forming cations than mature wood. Powder XRD patterns from fresh field ash were dominated by various proportions of fairchildite [K 2 Ca(CO 3 ) 2 ], calcite (CaCO 3 ), lime (CaO), bütschliite (dimorph of fairchildite), and periclase...
FIGURES | View All (8)
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Elemental maps for a <span class="search-highlight">fairchildite</span>-containing inclusion in the center of mag...
Published: 01 February 2011
Fig. 8. Elemental maps for a fairchildite-containing inclusion in the center of magnetite from the Loolekop phoscorite.
Journal Article
Published: 01 June 1997
American Mineralogist (1997) 82 (5-6): 546–548.
...Alexandra Navrotsky; Robert L. Putnam; Camilla Winbo; Erik Rosen Abstract Enthalpies of formation, Δ H f , of the double carbonates K 2 Ca(CO 3 ) 2 (with two polymorphs, bütschliite and fairchildite) and K 2 Ca 2 (CO 3 ) 3 from the components K 2 CO 3 and CaCO 3 were determined at 298 K by drop...
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Phase diagrams for the systems Na 2 CO 3 –K 2 CO 3 –CaCO 3  ( Cooper et al....
Published: 01 February 2011
Fig. 1. Phase diagrams for the systems Na 2 CO 3 –K 2 CO 3 –CaCO 3 ( Cooper et al., 1975 ) and K 2 Ca(CO 3 ) 2 –Na 2 Mg(CO 3 ) 2 ( McKie, 1990 ) at 1 kbar. (NC–KC–CC)ss, Solid solution Na 2 CO 3 –K 2 CO 3 –CaCO 3 ; (NY–FC)ss, nyerereite–fairchildite solid solution; A, K 2 Ca 2 (CO 3 ) 3 ; CC
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Representative powder X-ray diffraction patterns from laboratory ash sample...
Published: 01 July 2016
Figure 4 Representative powder X-ray diffraction patterns from laboratory ash samples from Tree B (PV3) and Tree A (PV2). Minerals matched include P = periclase, MgO; F = fairchildite, K 2 Ca(CO 3 ) 2 ; Ca = calcite, CaCO 3 ; S = sylvite, KCl; K = KOH; Kc = K 2 CO 3 ; L = lime, CaO; Kp = K 2 PO 4
Journal Article
Published: 01 November 2022
American Mineralogist (2022) 107 (11): 2054–2064.
..., we show that nyerereite has a unique crystal structure, not having analogs among the known structures, except for the structure with a similar composition K 2 Ca(CO 3 ) 2 fairchildite. A comparison between the centrosymmetric Pbca nyerereite structure and that of aragonite (CaCO 3 , Pmcn space group...
FIGURES | View All (7)
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Backscattered scanning electron microscope (BSE-SEM) images of typical ash ...
Published: 01 July 2016
Figure 6 Backscattered scanning electron microscope (BSE-SEM) images of typical ash particles from Tree 1 field ash. ( a ) Fairchildite particle with flow-like morphology and segmented surface. ( b ) Three euhedral calcite pseudomorph grains after whewellite. Scale bars = 10 μm.
Journal Article
Published: 01 October 2002
American Mineralogist (2002) 87 (10): 1384–1389.
... with shortite but are quite distinct from other alkali carbonates such as nyerereite, butschiite, and fairchildite. The heat capacity of zemkorite has been measured up to 700 K by differential scanning calorimetric techniques. The temperature dependence of the heat capacity of zemkorite was fitted...
FIGURES | View All (6)
Journal Article
Published: 01 April 1974
American Mineralogist (1974) 59 (3-4): 353–358.
...Adolf Pabst Abstract Synthesis of both the high- and low-temperature forms (fairchildite and buetschliite) by solid state reaction, one of five methods of synthesis used, suggests that the transition point is in the interval 505–585°C. Low-K 2 Ca(CO 3 ) 2 , buetschllite, crystallizes in the space...
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Backscattered scanning electron microscope (BSE-SEM) images of typical ash ...
Published: 01 July 2016
Figure 3 Backscattered scanning electron microscope (BSE-SEM) images of typical ash particles from Tree B (PV3). ( a ) Fairchildite particle with flow-like morphology and segmented surface. ( b ) Particle with fractal-like network. EDX spectrum shows major peaks for Mg, K, C, and O. ( c
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Projection of  T-X  diagrams of the system Na 2 CO 3 –K 2 CO 3 –CaCO 3  at ...
Published: 01 January 2015
Fig. 17. Projection of T-X diagrams of the system Na 2 CO 3 –K 2 CO 3 –CaCO 3 at 0.1 GPa ( Cooper et al., 1975 ). (Na,K)2SS = solid solution of CaCO 3 in (Na,K) 2 CO 3 ; (Na,K)2Ca = solid solution nyerereite –fairchildite (Na,K) 2 Ca(CO 3 ) 2 ; K 2 Ca 2 = K 2 Ca 2 (CO 3 ) 3 .
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Representative powder X-ray diffraction patterns for Tree 1 and 2 field ash...
Published: 01 July 2016
Figure 7 Representative powder X-ray diffraction patterns for Tree 1 and 2 field ash collected on May 15th, prior to rains. P = periclase, MgO; L = lime, CaO; F = fairchildite, K 2 Ca(CO 3 ) 2 ; Ca = calcite, CaCO 3 ; Ba = baylissite, K 2 Mg(CO 3 ) 2 ·4H 2 O; Ar = arcanite, K 2 SO 4 ; Kp = K 2 PO
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Phase relations in the pseudobinary system K 2 CO 3 –CaCO 3  ( a ) at 1 atm...
Published: 01 January 2015
) 2 ; Fc = fairchildite, K 2 Ca(CO 3 ) 2 ; K 2 Ca 2 = K 2 Ca 2 (CO 3 ) 3 ; K 4 Ca 5 = K 4 Ca 5 (CO 3 ) 7 .
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Phase relations in the system K 2 CO 3 -CaCO 3  at 1 bar CO 2  pressure ( A...
Published: 01 January 2015
Figure 1 Phase relations in the system K 2 CO 3 -CaCO 3 at 1 bar CO 2 pressure ( Arceo and Glasser 1995 ) ( a ) and at pressure of 0.1 GPa ( Cooper et al. 1975 ) ( b ). K 2 = K 2 CO 3 ; K 2SS = CaCO 3 solid solution in K 2 CO 3 ; BU = buetschliite, K 2 Ca(CO 3 ) 2 ; FC = fairchildite, K 2 Ca