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![Photomicrographs of El Laco destinezite. (a) Massive fine-grained destinezite (de-1) crisscrossed by multiple fractures rimmed by coarse-grained destinezite (de-2); hematite crystals (hm) usually occur near these microfractures. (b) Large coarse-grained subhedral destinezite crystals (de-2) overgrowing primary massive aggregates close to the micro-veins; lighter edges and dark core sectors (brown colors) in some crystals indicate incipient transformation to supergene Fe-phosphate products (tinticite?). (c) Porous incrustations of supergene Sr-rich jarosite (Sr-jar) associated with spherulitic cacoxenite (radiate fibrous growth) that occasionally occur coating some destinezite lumps. Images taken in transmitted light microscopy mode with crossed polarizers. (Color online.)]()
![(a) Unconsolidated hematite-rich epiclastic deposits beneath the Laco Sur orebody showing a crude layering and poor grain sorting. The horizon containing destinezite lumps displays an intense orange color. (b) Cluster of destinezite fragments with sizes between 2 and 10 cm in diameter belonging to the same chaotic layer. The layer is mainly composed of rubble and fine-grained debris of hematite and is interpreted as representing surge deposits in a crater lake. Note the intense fragmentation and the angled character of the destinezite clasts. (Color online.)]()
![Backscattered electron (BSE) images of the destinezite. (a) Equigranular aggregate of destinezite (de-1) with thick hematite crystals displaying the typical tabular/platy habit; both are affected by a fracture filled of supergene goethite. (b) Aggregate of individual crystals of destinezite (de-2) exhibiting the pseudohexagonal habit and the presence of abundant cleavage cracks along (100) as a result of a significant loss of water. Bleached zones (light gray) along the cleavage and fractures of some crystals reveal variable transformation to secondary Fe-phosphate products. Black zones are pore and cracks.]()
![Phase stability diagrams for the Fe-P-S-O system calculated using the Act2 application with GWB (Bethke 1996) to illustrate the transformation of lipscombite to destinezite at low-temperature hydrothermal conditions. The restrictions imposed are those typical of the steam-heated environment, assuming geochemically reasonable ranges of concentrations of dissolved species: activities of Fe2+, K+, and Ca2+ are set at 10–2, while for SO42− and HPO42− the activity value varies according to the model. Red solid and dashed lines define the boundary separating the regions of stable phases. The open and cross-hatched circular areas represent the proposed initial (1) and final (2) conditions for the transformation of lipscombite to destinezite. (a) Plot of stability fields of Fe phosphate, sulfate, and oxide in terms of variable dissolved total phosphate and pH. The above imposed constraints to define the field boundaries include a SO42– activity of 10–2, and oxidizing conditions. The upper half of the diagram illustrates the significant reduction of the stability field of lipscombite with decreasing temperature. Dashed-lines correspond to the boundaries of the stability field at 200 and 100 °C. The plot of the lower part of the diagram shows the stable destinezite-hematite equilibrium at low temperatures (100 °C). The blue dashed line is for the apatite-fluorite boundary at 300 °C. Arrows indicate the presumed trend followed by the fluids for the transformation of lipscombite to destinezite and for fluorite precipitation. (b) Stability relationship between the three identified phases (destinezite, lipscombite, and hematite) in aqueous solutions at temperature of 100 °C and variable pH (2, 3, and 4). Note the enlargement of the destinezite field as the pH decreases in conformity with environments dominated by acid-sulfate hydrothermal alteration. (c) Temperature-pH diagram for the main minerals found in the destinezite lumps. The Fe and S activities are the same as in a. Note the significant reduction of the stability field of lipscombite when the activity of HPO42– decreases from 10–3 to 10–5. (d) Activity-pH diagram for the K2O-Al2O3-SiO2-P2O5-H2O system calculated at 100 °C showing the stability of variscite relative to alunite, kaolinite, muscovite, and K-feldspar; the dashed line corresponds to the destinezitehematite boundary showed in lower half of the a diagram. (Color online.)]()
![Thermal decomposition analysis of the El Laco destinezite under an N2-gas atmosphere at a heating rate of 5 °C/min. (a) Thermogravimetric (TG) (in blue) and differential thermogravimetric (DTG) (in red) curves; mass loss in percent and mass derivative in %/°C, respectively. (b) Thermal decomposition for the destinezite (TG in %), heat capacity (CP, J/g°C), and associated enthalpy change (ΔH, J/g) in the temperature range 50 to 900 °C. (Color online.)]()
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![Chains built from octahedra and tetrahedra in the structures of arangasite (a), destinezite (b) and sanjuanite (c).]()
![(a) The [M(TØ4)3] octahedral–tetrahedral chain in ferrinatrite; (b) the arrangement of [M(TØ)3] chains in ferrinatrite; (c) the [M2(TØ4)3Ø5] chain in the minerals of the copiapite group; (d) the structure of copiapite; (e) the chain in destinezite; (f) packing of the chains in destinezite; (g) the [M(TO4) Ø2] chain in linarite; (h) packing of [M(TO4) Ø2] chains in linarite. (i) the [M(TO4)2Ø] chain in wherryite; (j) packing of [M(TO4)2Ø] chains in wherryite.]()
![(a) The [M(TØ4)3] octahedral–tetrahedral chain in ferrinatrite; (b) the arrangement of [M(TØ)3] chains in ferrinatrite; (c) the [M2(TØ4)3Ø5] chain in the minerals of the copiapite group; (d) the structure of copiapite; (e) the chain in destinezite; (f) packing of the chains in destinezite; (g) the [M(TO4) Ø2] chain in linarite; (h) packing of [M(TO4) Ø2] chains in linarite. (i) the [M(TO4)2Ø] chain in wherryite; (j) packing of [M(TO4)2Ø] chains in wherryite.]()
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![Similar octahedral/tetrahedral packing of chains in the arangasite (a), destinezite (b) and sanjuanite (c, facing page) structures shown along the shortest axis of the unit cells.]()
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![Schematic geological map of the El Laco volcano, northern Chile (a) showing the major magnetite-apatite deposits (black areas) and zones of hydrothermal alteration (red areas) hosted in the Pliocene andesitic rocks (modified from Tornos et al. 2016). Star symbol indicates the main location of the destinezite-rich rocks near the Laco Sur ore body. (b) General view of El Laco volcano from south. Note the zone of intense alunitization of the volcanics at the south slope of the mountain (light color is the Pasos Blancos area). (Color online.)]()
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1-20 OF 48 RESULTS FOR
destinezite
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Journal Article
The relationship of destinezite to the acid sulfate alteration at the El Laco magnetite deposit, Chile
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 June 2020
American Mineralogist (2020) 105 (6): 860–872.
...Francisco Velasco; Noelia de la Pinta; Fernando Tornos; Thomas Briezewski; Aitor Larrañaga Abstract Destinezite, ideally Fe 2 3 + (PO 4 )(SO 4 )(OH)·6(H 2 O), is found as nodular lumps in hematite-rich epiclastic sediments accumulated in small crater lakes on the slopes of El Laco volcano...
FIGURES
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Journal Article
Destinezite ("diadochite"), Fe 2 (PO 4 )(OH).6H 2 O; its crystal structure and role as a soil mineral at Alum Cave Bluff, Tennessee
Journal: Clays and Clay Minerals
Publisher: Clay Minerals Society
Published: 01 February 1999
Clays and Clay Minerals (1999) 47 (1): 1–11.
...Donald R. Peacor; Roland C. Rouse; T. Dennis Coskren; Eric J. Essene Abstract A new occurrence of destinezite (diadochite), ideally Fe 2 (PO 4 )(SO 4 )(OH).6H 2 O, is described from Alum Cave Bluff, Great Smoky Mountains National Park, Tennessee, where it occurs in soil and in a weathered...
Image
Photomicrographs of El Laco destinezite. ( a ) Massive fine-grained destine...
in The relationship of destinezite to the acid sulfate alteration at the El Laco magnetite deposit, Chile
> American Mineralogist
Published: 01 June 2020
Figure 3. Photomicrographs of El Laco destinezite. ( a ) Massive fine-grained destinezite (de-1) crisscrossed by multiple fractures rimmed by coarse-grained destinezite (de-2); hematite crystals (hm) usually occur near these microfractures. ( b ) Large coarse-grained subhedral destinezite
Image
( a ) Unconsolidated hematite-rich epiclastic deposits beneath the Laco Sur...
in The relationship of destinezite to the acid sulfate alteration at the El Laco magnetite deposit, Chile
> American Mineralogist
Published: 01 June 2020
Figure 2. ( a ) Unconsolidated hematite-rich epiclastic deposits beneath the Laco Sur orebody showing a crude layering and poor grain sorting. The horizon containing destinezite lumps displays an intense orange color. ( b ) Cluster of destinezite fragments with sizes between 2 and 10 cm
Image
Backscattered electron (BSE) images of the destinezite. ( a ) Equigranular ...
in The relationship of destinezite to the acid sulfate alteration at the El Laco magnetite deposit, Chile
> American Mineralogist
Published: 01 June 2020
Figure 4. Backscattered electron (BSE) images of the destinezite. ( a ) Equigranular aggregate of destinezite (de-1) with thick hematite crystals displaying the typical tabular/platy habit; both are affected by a fracture filled of supergene goethite. ( b ) Aggregate of individual crystals
Image
Phase stability diagrams for the Fe-P-S-O system calculated using the Act2 ...
in The relationship of destinezite to the acid sulfate alteration at the El Laco magnetite deposit, Chile
> American Mineralogist
Published: 01 June 2020
Figure 6. Phase stability diagrams for the Fe-P-S-O system calculated using the Act2 application with GWB ( Bethke 1996 ) to illustrate the transformation of lipscombite to destinezite at low-temperature hydrothermal conditions. The restrictions imposed are those typical of the steam-heated
Image
Thermal decomposition analysis of the El Laco destinezite under an N 2 -gas...
in The relationship of destinezite to the acid sulfate alteration at the El Laco magnetite deposit, Chile
> American Mineralogist
Published: 01 June 2020
Figure 5. Thermal decomposition analysis of the El Laco destinezite under an N 2 -gas atmosphere at a heating rate of 5 °C/min. ( a ) Thermogravimetric (TG) (in blue) and differential thermogravimetric (DTG) (in red) curves; mass loss in percent and mass derivative in %/°C, respectively. ( b
Journal Article
The crystal structure of arangasite, Al 2 F(PO 4 )(SO 4 )·9H 2 O determined using low-temperature synchrotron data
Journal: Mineralogical Magazine
Published: 01 August 2014
Mineralogical Magazine (2014) 78 (4): 889–903.
... built from (Fe, Al) octahedra and P tetrahedra in the crystal structure of destinezite, Fe 2 (OH)(PO 4 )(SO 4 )·6H 2 O. It has been shown that in spite of very similar chemical formulae, arangasite and sanjuanite, Al 2 (OH)(PO 4 )(SO 4 )·9H 2 O, are not isotypic. T he mineral arangasite, Al 2 F(PO 4...
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Image
Chains built from octahedra and tetrahedra in the structures of arangasite ...
in The crystal structure of arangasite, Al 2 F(PO 4 )(SO 4 )·9H 2 O determined using low-temperature synchrotron data
> Mineralogical Magazine
Published: 01 August 2014
F ig . 6. Chains built from octahedra and tetrahedra in the structures of arangasite ( a ), destinezite ( b ) and sanjuanite ( c ).
Image
![(a) The [M(TØ4)3] octahedral–tetrahedral chain in ferrinatrite; (b) the arrangement of [M(TØ)3] chains in ferrinatrite; (c) the [M2(TØ4)3Ø5] chain in the minerals of the copiapite group; (d) the structure of copiapite; (e) the chain in destinezite; (f) packing of the chains in destinezite; (g) the [M(TO4) Ø2] chain in linarite; (h) packing of [M(TO4) Ø2] chains in linarite. (i) the [M(TO4)2Ø] chain in wherryite; (j) packing of [M(TO4)2Ø] chains in wherryite.](https://gsw.silverchair-cdn.com/gsw/Content_public/Journal/rimg/40/1/10.2138_rmg.2000.40.1/3/s_0001f23a.jpeg?Expires=2147483647&Signature=2SE3TC0azmUoRq4EWVkiOf7ttn8Gm1LgOMJJFU~lZHrmQZlVGhVP52IL~qphHz8Q14CbniXJeMwavgPEVmZkCbALwcpPajm~3cJmqutBI114qET4CCd8KMTZWWXhSfiqYeD-Oi~h3i4Po6Rs-Wy8UsZRAJxL3CdKa0c8YfXO~IMzy2SzUzlYUJtDyS90uvGIgeg8g7rJVqaxaroVPHhgo0yHwFc6uO9-RcHKfif5n8L6g0j8NiU1qy4L8SPim9Ip1mQVvstw3WE6u65aUQdWc5q3jpSwogwatWxsecBWSkOBzD~-tr0zqL2tpzEu5~lIqJlZjcuJjbX0J6z0jAVsLw__&Key-Pair-Id=APKAIE5G5CRDK6RD3PGA)
(a) The [ M ( T Ø 4 ) 3 ] octahedral–tetrahedral chain in ferrinatrite; (b)...
Published: 01 January 2000
Figure 23. (a) The [ M ( T Ø 4 ) 3 ] octahedral–tetrahedral chain in ferrinatrite; (b) the arrangement of [ M ( T Ø) 3 ] chains in ferrinatrite; (c) the [ M 2 ( T Ø 4 ) 3 Ø 5 ] chain in the minerals of the copiapite group; (d) the structure of copiapite; (e) the chain in destinezite; (f
Image
![(a) The [M(TØ4)3] octahedral–tetrahedral chain in ferrinatrite; (b) the arrangement of [M(TØ)3] chains in ferrinatrite; (c) the [M2(TØ4)3Ø5] chain in the minerals of the copiapite group; (d) the structure of copiapite; (e) the chain in destinezite; (f) packing of the chains in destinezite; (g) the [M(TO4) Ø2] chain in linarite; (h) packing of [M(TO4) Ø2] chains in linarite. (i) the [M(TO4)2Ø] chain in wherryite; (j) packing of [M(TO4)2Ø] chains in wherryite.](https://gsw.silverchair-cdn.com/gsw/Content_public/Journal/rimg/40/1/10.2138_rmg.2000.40.1/3/s_0001f23b.jpeg?Expires=2147483647&Signature=FYm5T6ML9N82xpiGkszTskZVv2G0d59oheq08wGXW6VfuNQQDyuTo5Lxt7jrSq1WNvD3Yelj2Gx3AeQo6DUOsTU0yqSdVPOBOtfZLkpV5nsZpnSQQEaLns2hcnX7fljSOVw2OdI8kda-ITny94KImnroHiOVTMcz155IVEfAemP7I2xk6qzNdJQ8VS778ebwfHvtrfyY4asT9kI-8LKJvy5DDgvUGlcN9ON1ksFOvs1ezaV659zALkfNXZEi5f4jGnH9uORyZmdZDrFbESsJHQne1UZzfjJMu22vkLqXHR2EXJ0mp2U4b5QwXoc2wp4FA9apviv5DQE21cq8iMEkpQ__&Key-Pair-Id=APKAIE5G5CRDK6RD3PGA)
(a) The [ M ( T Ø 4 ) 3 ] octahedral–tetrahedral chain in ferrinatrite; (b)...
Published: 01 January 2000
Figure 23. (a) The [ M ( T Ø 4 ) 3 ] octahedral–tetrahedral chain in ferrinatrite; (b) the arrangement of [ M ( T Ø) 3 ] chains in ferrinatrite; (c) the [ M 2 ( T Ø 4 ) 3 Ø 5 ] chain in the minerals of the copiapite group; (d) the structure of copiapite; (e) the chain in destinezite; (f
Journal Article
Bohuslavite, Fe 4 3 + (PO 4 ) 3 (SO 4 )(OH)(H 2 O) 10 · n H 2 O, a new hydrated iron phosphate-sulfate
Journal: European Journal of Mineralogy
Publisher: GeoScienceWorld Journals
Published: 01 September 2019
European Journal of Mineralogy (2019) 31 (5-6): 1033–1046.
... was observed in ramazzoite ( i . e ., 0.33), where a PO 4 group is at the centre of a polyoxometalate (POM) cluster and SO 4 groups occur in the interstitial region surrounding the POM clusters ( Kampf et al ., 2018 ). Among phosphate-sulfate minerals, destinezite and its amorphous analogue diadochite...
FIGURES
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Includes: Supplemental Content
Image
Similar octahedral/tetrahedral packing of chains in the arangasite ( a ), d...
in The crystal structure of arangasite, Al 2 F(PO 4 )(SO 4 )·9H 2 O determined using low-temperature synchrotron data
> Mineralogical Magazine
Published: 01 August 2014
F ig . 7. Similar octahedral/tetrahedral packing of chains in the arangasite ( a ), destinezite ( b ) and sanjuanite ( c, facing page ) structures shown along the shortest axis of the unit cells.
Journal Article
Mapiquiroite, (Sr,Pb)(U,Y)Fe 2 (Ti,Fe 3+ ) 18 O 38 , a new member of the crichtonite group from the Apuan Alps, Tuscany, Italy
Journal: European Journal of Mineralogy
Publisher: GeoScienceWorld Journals
Published: 01 June 2014
European Journal of Mineralogy (2014) 26 (3): 427–437.
.... At BdV, mapiquiroite occurs as complex rhombohedral or tabular pseudo-hexagonal crystals, up to 1 mm in size, black in colour, with a sub-metallic lustre, in quartz + ‘adularia’ + baryte veins embedded in schists, in association with allanite-(Ce), anatase, destinezite, gypsum, monazite-(Ce), pyrite...
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Journal Article
Rossiantonite, Al 3 (PO 4 )(SO 4 ) 2 (OH) 2 (H 2 O) 10 ·4H 2 O, a new hydrated aluminum phosphate-sulfate mineral from Chimanta massif, Venezuela: Description and crystal structure
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 October 2013
American Mineralogist (2013) 98 (10): 1906–1913.
.... Four additional water molecules are placed in between the previously identified chains. Two oxygen tetrahedra, occupied by S atoms, are connected along the chains by means of weak hydrogen bonding. The rossiantonite structure shows similarities with minerals belonging to the sanjuanite-destinezite...
FIGURES
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Includes: Supplemental Content
Journal Article
NEW MINERAL NAMES
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 January 2000
American Mineralogist (2000) 85 (1): 263–266.
... 52.9, As 2 O 5 10.0, Fe 2 O 3 11.2, H 2 O (calc.) 19.4, sum 100.6 wt%, with K and F not detected, thus leading to the new formula given above. J.L.J. D.R. Peacor, R.C. Rouse, T.D. Coskren, E.J. Essene (1999) Destinezite (“diadochite”), Fe 2 (PO 4 )(SO 4 )(OH)⋄6H 2 O: its crystal structure...
Image
Schematic geological map of the El Laco volcano, northern Chile ( a ) showi...
in The relationship of destinezite to the acid sulfate alteration at the El Laco magnetite deposit, Chile
> American Mineralogist
Published: 01 June 2020
location of the destinezite-rich rocks near the Laco Sur ore body. ( b ) General view of El Laco volcano from south. Note the zone of intense alunitization of the volcanics at the south slope of the mountain (light color is the Pasos Blancos area). (Color online.)
Journal Article
Camaronesite, [Fe 3+ (H 2 O) 2 (PO 3 OH)] 2 (SO 4 )·1–2H 2 O, a new phosphate-sulfate from the Camarones Valley, Chile, structurally related to taranakite
Journal: Mineralogical Magazine
Published: 01 June 2013
Mineralogical Magazine (2013) 77 (4): 453–465.
...-standing crystals of the new mineral. The new mineral species, a remarkable ferric iron phosphate–sulfate, is named camaronesite (kæm a:r ’oun æz ait) for the locality. In spite of the abundance of Fe, S and P in the natural environment, only two minerals, destinezite, and its amorphous analogue...
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Journal Article
The crystal structure of sarmientite, Fe 2 3 + (AsO 4 )(SO 4 )(OH)·5H 2 O, solved ab initio from laboratory powder diffraction data
Journal: Mineralogical Magazine
Published: 01 April 2014
Mineralogical Magazine (2014) 78 (2): 347–360.
... by Hawthorne et al ., 2000 ), they are infrequent among arsenates, having been described in bukovskýite ( Majzlan et al ., 2012 ) and in synthetic kaatialaite ( Boudjada and Guitel, 1981 ). Based on their similar chemical composition, sarmientite was assumed to be related to destinezite, Fe 2 3...
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Journal Article
Crystal structure of the hydrated sulphate pickeringite (MgAl 2 (SO 4 ) 4 ·22H 2 O) : X-ray powder diffraction study
Journal: European Journal of Mineralogy
Publisher: GeoScienceWorld Journals
Published: 01 November 2000
European Journal of Mineralogy (2000) 12 (6): 1131–1138.
... . Peacor , D.R. , Rouse , R.C. , Coskren , T.D. , Essene , E.J. ( 1999 ): Destinezite (“diadochite”), Fe-2(PO 4 )(SO 4 ) (OH)6H 2 O: Its crystal structure and role as a soli mineral at Alum Cave Bluff, Tennessee . Clays and Clay Minerals , 47 , 1 – 11 . Sabelli , S...
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