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dittmarite

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Journal Article
Published: 01 February 2017
Mineralogical Magazine (2017) 81 (1): 155–166.
... by a guano deposit. Associated minerals are salammoniac, dittmarite, möhnite and gypsum. Joanneumite is non-fluorescent and the Mohs hardness is 1. The calculated density is 2.020 g cm –3 . The infrared spectrum of joanneumite shows the frequencies of NH 3 and isocyanurate groups and the absence...
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Journal Article
Published: 01 August 2013
Mineralogical Magazine (2013) 77 (6): 2725–2737.
... (PO 4 ) 3 OH, it takes several weeks to convert magnesite into pseudomorphic dittmarite, (NH 4 )Mg(PO 4 )·H 2 O. The conversion of dolomite, as the compositional intermediate, also proceeded slowly, but yielded a biphasic pseudomorph composed of whitlockite, Ca 9 Mg(PO 4 ) 6 (PO 3 OH), and dittmarite...
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Journal Article
Published: 02 May 2018
Mineralogical Magazine (2018) 82 (4): 1007–1014.
..., Chile. Associated minerals are salammoniac, halite, dittmarite, joanneumite, chanabayaite, nitratine, natroxalate and möhnite. Triazolite occurs as deep blue prismatic crystals up to 0.1 mm × 0.15 mm × 0.75 mm and their radial aggregates up to 1.5 mm across. The mineral is brittle. Its Mohs hardness...
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Powder XRD pattern of partially converted magnesite (Mag), identifying the ...
Published: 01 August 2013
F ig . 4. Powder XRD pattern of partially converted magnesite (Mag), identifying the conversion product to be dittmarite (Dit).
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SEM image (BSE) of a cleavage cross-section through a magnesite crystal wit...
Published: 01 August 2013
F ig . 5. SEM image (BSE) of a cleavage cross-section through a magnesite crystal with a pseudomorphic dittmarite layer after 5 weeks (840 h) of conversion at 180°C. Conversion of magnesite into dittmarite started with the formation large crystals on the surface which gradually became finer
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Powder XRD pattern of partially converted dolomite (Do), identifying the co...
Published: 01 August 2013
F ig . 7. Powder XRD pattern of partially converted dolomite (Do), identifying the conversion products to be whitlockite (Whit) and dittmarite (Dit).
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Model for the development of a biphasic pseudomorph during dolomite convers...
Published: 01 August 2013
are removed from the fluid by precipitation of whitlockite. The hydrated magnesium ions form a network with phosphate and ammonium ions leading to dittmarite crystallization. ( c ) As more dolomite is dissolved, the alternating precipitation forms a layered structure of whitlockite and dittmarite.
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SEM back scattered electron (BSE) images of a dolomite crystal after 48 h o...
Published: 01 August 2013
dittmarite platelets.
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Raman spectroscopy of crystals precipitated on dolomite during conversion. ...
Published: 01 August 2013
F ig . 8. Raman spectroscopy of crystals precipitated on dolomite during conversion. The spherical aggregates can be assigned to whitlockite, while the platelet crystals can be assigned to dittmarite. The substrate measurement was obtained from a freshly cleaved {101İ4} dolomite face.
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SEM (BSE) image of a cross section of dolomite converted for 5 weeks. Diffe...
Published: 01 August 2013
F ig . 9. SEM (BSE) image of a cross section of dolomite converted for 5 weeks. Different regions can be seen within the biphasic reaction rim: starting from the surface, a layered structure of whitlockite and dittmarite was formed, while closer to the core an intimate mixture of the two phases
Journal Article
Published: 01 April 2011
American Mineralogist (2011) 96 (4): 675–681.
... ) Contribution of bacterial cell wall components to DOM in alkaline, hypersaline Mono Lake, California. Geomicrobiology Journal , 25 , 38 –55. Koleva, V.G. ( 2007 ) Vibrational behavior of the phosphates ions in dittmarite-type compounds M′M″PO4·H 2 O (M′=K + , NH 4 + ; M″=Mn 2+ , Co 2+ , Ni 2...
FIGURES
Journal Article
Published: 01 October 2012
American Mineralogist (2012) 97 (10): 1783–1787.
... minerals. Witzkeite forms elongated, tabular crystals up to 140 μm in length ( Fig. 1 ) and is associated with dittmarite and nitratine. It is colorless and transparent, with a white streak and a vitreous lustre. Witzkeite is brittle, with Mohs hardness 2 and distinct cleavage on {001}. No parting...
FIGURES
Journal Article
Published: 01 October 2007
The Canadian Mineralogist (2007) 45 (5): 1307–1324.
..., calciopetersite, carbonate-hydroxylapatite, cassidyite, chladniite, corkite, crandallite, delvauxite, diadochite, dittmarite, drugmanite, dufrénite, dumontite, eylettersite, fairfieldite, faustite, ferro-alluaudite, florencite-(Ce), florencite-(Nd), gatehouseite, goyazite, grattarolaite, grayite, herderite...
Journal Article
Published: 01 August 2014
American Mineralogist (2014) 99 (8-9): 1761–1765.
... of magnesium-ammonium orthophosphate . Monatshefte für Chemie , 130 , 1431 – 1442 . Koleva V.G. ( 2007 ) Vibrational behavior of the phosphates ions in dittmarite-type compounds M′M″PO4·H 2 O (M′ = K + , NH 4 + ; M″ = Mn 2+ , Co 2+ , Ni 2+ ) . Spectrochimica Acta, A , 66 , 413 – 418...
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Journal Article
Published: 01 January 2021
American Mineralogist (2021) 106 (1): 157–164.
Journal Article
Published: 01 May 2017
American Mineralogist (2017) 102 (5): 1143–1148.
..., dittmarite, möhnite, and gypsum filling small cracks in gabbroic rocks. It forms violet microcrystalline aggregates up to 2 mm showing sometimes well-shaped cubic crystals which are pseudomorphs after unidentified mineral. The new mineral is transparent, vitreous with a pale violet streak and is non...
Journal Article
Published: 01 April 2013
The Canadian Mineralogist (2013) 51 (2): 223–232.
.... Lesnikovich A.I. ( 2004b ) Crystal structure determination of In 3 (H 3 O)(H 2 PO 4 ) 6 (HPO 4 ) 2 ·4H 2 O from X-ray powder diffraction . Zeitschrift für Kristallographie 219 , 543 – 547 . Koleva V.G. ( 2007 ) Vibrational behavior of the phosphates ions in dittmarite-type compounds M′M″PO...
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Journal Article
Published: 01 January 2002
Reviews in Mineralogy and Geochemistry (2002) 48 (1): 123–253.
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