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![Backscattered electron (BSE) images of helvine-group minerals from Dulong: (a–b) an euhedral-subhedral oscillatory-zoned helvine-danalite grain, showing intergrowth of sphalerite, talc, biotite, and helvine-danalite. In general, the dark-gray and bright zones are helvine and danalite, respectively; (c) fluorite veins or grains intergrown with sphalerite and pyrrhotite in the helvine-danalite; (d–f) cassiterite, biotite, ilmenite, and apatite in the danalite zone. Abbreviations: Ilm = ilmenite; Ap = apatite, and as in Figure 3.]()
![Crystal drawing of a danalite crystal (a) completely enclosed by a genthelvite dodecahedron and (b) partially enclosed by a genthelvite dodecahedron. The danalite is exposed as a triangular face.]()
![The crystal structures of hsinghualite, trimerite and danalite; (a) hsinghualite projected onto (001); large circles are Ca atoms, small circles are Li atoms; (b) trimerite projected onto (010); circles are Ca and Mn atoms, tetrahedra occupy the vertices of a 63 net; (c) trimerite projected onto (100); Mn atoms are shown as circles; (d) danalite projected onto (001); circles are Fe atoms; (e) danalite projected onto (001); FeO3S tetrahedra are trellis-shaded.]()
![Rose genthelvite with an exposed tetrahedral face of the danalite core. The danalite face is red except where it is coated by either (a) hematite after siderite or (b) a thin layer of beige genthelvite. Field of view is 9 mm.]()
![HR-TEM image (325,000×) showing the danalite-genthelvite interface, denoted by the solid line. The inset shows the electron diffraction pattern down the [011] axis from the whole image which shows the overall coherency of the danalite and genthelvite lattices.]()
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![Compositions of genthelvite, danalite and helvine expressed as percentages of Zn + Fe + Mn atoms.]()
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1-20 OF 104 RESULTS FOR
danalite
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1
Journal Article
Helvine-danalite mineralogy of the Dulong Sn-Zn polymetallic deposit in southeast Yunnan, China Available to Purchase
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 August 2022
American Mineralogist (2022) 107 (8): 1598–1610.
...) analyses indicate that these helvine-group minerals are oscillatory-zoned helvine-danalite. Both the helvine and danalite zones are mixed with varying proportion of the other helvine-group end-member, and our studies indicate that the oscillatory zoning was formed mainly by periodic fluctuations...
FIGURES
Journal Article
Genthelvite Overgrowths On Danalite Cores from a Pegmatite Miarolitic Cavity in Cheyenne Canyon, El Paso County, Colorado Available to Purchase
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 01 March 2017
The Canadian Mineralogist (2017) 55 (2): 195–206.
...Gary Zito; Sarah L. Hanson Abstract A miarolitic cavity in a pegmatite in Cheyenne Canyon, El Paso Co., Colorado has an unusual mineral assemblage that includes epitaxial genthelvite overgrowths on danalite cores. The cavity was lined with white microcline crystals with clear epitaxial albite...
FIGURES
Journal Article
THE STRUCTURE OF DANALITE AT HIGH TEMPERATURE OBTAINED FROM SYNCHROTRON RADIATION AND RIETVELD REFINEMENTS Available to Purchase
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 01 December 2003
The Canadian Mineralogist (2003) 41 (6): 1413–1422.
...Sytle M. Antao; Ishmael Hassan; John B. Parise Abstract The structural behavior of danalite, ideally Fe 8 [Be 6 Si 6 O 24 ]S 2 , at atmospheric pressure and from 33 to 1035°C on heating, was determined by using in situ synchrotron X-ray powder-diffraction data (λ = 0.92249 Å) and Rietveld...
FIGURES
Journal Article
THERMAL ANALYSES OF SODALITE, TUGTUPITE, DANALITE AND HELVITE Available to Purchase
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 01 February 2002
The Canadian Mineralogist (2002) 40 (1): 163–172.
...Sytle M. Antao; Ishmael Hassan Abstract Differential thermal analyses (DTA) and thermogravimetric analyses (TG) were carried out on sodalite, tugtupite, danalite, and helvite using a Netzsch STA 409 EP/3/D simultaneous TG–DTA apparatus. In the DTA and TG experimental run, a weighed amount of finely...
FIGURES
Journal Article
Crystal chemistry of danalite from Daba Shabeli Complex (N Somalia) Free
Journal: Mineralogical Magazine
Published: 01 April 1996
Mineralogical Magazine (1996) 60 (2): 375–379.
Journal Article
The stability of danalite, Fe 4 Be 3 (SiO 4 ) 3 S Available to Purchase
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 April 1980
American Mineralogist (1980) 65 (3-4): 355–360.
...D. M. Burt Abstract End-member danalite is compositionally equivalent to a mixture of pyrrhotite, phenakite, and fayalite, but danalite’s natural occurrences with pyrite, magnetite, and quartz suggest that it is stable under somewhat more sulfidizing conditions than pyrrhotite and more oxidizing...
Journal Article
Danalite from British Columbia Available to Purchase
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 01 December 1957
The Canadian Mineralogist (1957) 6 (1): 68–71.
Journal Article
Helvite and danalite from New Mexico and the helvite group Available to Purchase
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 June 1944
American Mineralogist (1944) 29 (5-6): 163–191.
...Jewell J. Glass; Richard H. Jahns; Rollin E. Stevens Abstract Helvite and danalite occur at Iron Mountain in Sierra and Socorro Counties, south-western New Mexico, in a metamorphic contact zone between Paleozoic limestone and Tertiary rhyolites and granites. The host rock is a dark, banded tactite...
Image
Backscattered electron (BSE) images of helvine-group minerals from Dulong: ... Available to Purchase
in Helvine-danalite mineralogy of the Dulong Sn-Zn polymetallic deposit in southeast Yunnan, China
> American Mineralogist
Published: 01 August 2022
Figure 4. Backscattered electron (BSE) images of helvine-group minerals from Dulong: ( a–b ) an euhedral-subhedral oscillatory-zoned helvine-danalite grain, showing intergrowth of sphalerite, talc, biotite, and helvine-danalite. In general, the dark-gray and bright zones are helvine and danalite
Image
Crystal drawing of a danalite crystal (a) completely enclosed by a genthelv... Available to Purchase
in Genthelvite Overgrowths On Danalite Cores from a Pegmatite Miarolitic Cavity in Cheyenne Canyon, El Paso County, Colorado
> The Canadian Mineralogist
Published: 01 March 2017
Fig. 4. Crystal drawing of a danalite crystal (a) completely enclosed by a genthelvite dodecahedron and (b) partially enclosed by a genthelvite dodecahedron. The danalite is exposed as a triangular face.
Image
The crystal structures of hsinghualite, trimerite and danalite; (a) hsinghu... Available to Purchase
Published: 01 January 2002
Figure 29. The crystal structures of hsinghualite, trimerite and danalite; (a) hsinghualite projected onto (001); large circles are Ca atoms, small circles are Li atoms; (b) trimerite projected onto (010); circles are Ca and Mn atoms, tetrahedra occupy the vertices of a 6 3 net; (c) trimerite
Image
Rose genthelvite with an exposed tetrahedral face of the danalite core. The... Available to Purchase
in Genthelvite Overgrowths On Danalite Cores from a Pegmatite Miarolitic Cavity in Cheyenne Canyon, El Paso County, Colorado
> The Canadian Mineralogist
Published: 01 March 2017
Fig. 5. Rose genthelvite with an exposed tetrahedral face of the danalite core. The danalite face is red except where it is coated by either (a) hematite after siderite or (b) a thin layer of beige genthelvite. Field of view is 9 mm.
Image
![HR-TEM image (325,000×) showing the danalite-genthelvite interface, denoted by the solid line. The inset shows the electron diffraction pattern down the [011] axis from the whole image which shows the overall coherency of the danalite and genthelvite lattices.](https://gsw.silverchair-cdn.com/gsw/Content_public/Journal/canmin/55/2/10.3749_canmin.1600066/3/s_i1499-1276-55-2-195-f12.png?Expires=2147483647&Signature=41GVfvt1CSqZmvm4ZcZj1fRPXp685UzCMxlzNfH17EQUNpCW5amQ5LONYemhk68k9hlO~JUh~RPbHV1irbU9vIgfhLr-GvJFrjkTv0XvAICLoFecUMCDZdJNVbt3b3gnxJ5BWdmL88Qy0FmVVYJGU7DHPxvgsSMIQKvVf2VIExWp9zQCRP-CqE8rrgZbTCjbxjd~bzWcSSqvbNPmRarYRS9ZXINnW6IjwgrpgHbfQckKFCXzTu0CeBE02TG5mJgXL00eQcbtKRARQ66NqHs-uLqxYWATIzvjdrACBnmR5MxE8OHt2XLQVT1nm9LIJ9RFf6AKB3c7CFJUesTf1GsWmA__&Key-Pair-Id=APKAIE5G5CRDK6RD3PGA)
HR-TEM image (325,000×) showing the danalite-genthelvite interface, denoted... Available to Purchase
in Genthelvite Overgrowths On Danalite Cores from a Pegmatite Miarolitic Cavity in Cheyenne Canyon, El Paso County, Colorado
> The Canadian Mineralogist
Published: 01 March 2017
Fig. 12. HR-TEM image (325,000×) showing the danalite-genthelvite interface, denoted by the solid line. The inset shows the electron diffraction pattern down the [011] axis from the whole image which shows the overall coherency of the danalite and genthelvite lattices.
Journal Article
Mineral assemblages and compositional variations in bavenite–bohseite from granitic pegmatites of the Bohemian Massif, Czech Republic Open Access
Journal: Mineralogical Magazine
Published: 17 March 2023
Mineralogical Magazine (2023) 87 (3): 415–432.
... to pseudomorphs after a primary Be mineral (beryl > phenakite, helvine–danalite); and (3) a distal type on brittle fractures and fissures of host pegmatite. The mineral assemblages are highly variable: (1) axinite-(Mn), smectite, calcite and pyrite; (2) bertrandite, milarite, secondary beryl, bazzite, K...
FIGURES
Image
Compositions of genthelvite, danalite and helvine expressed as percentages ... Available to Purchase
in Mn–Fe-rich genthelvite from pegmatites associated with the Madeira Sn–Nb–Ta deposit, Pitinga, Brazil: new constraints on the magmatic-hydrothermal transition in the albite-enriched granite system
> Mineralogical Magazine
Published: 13 February 2024
Figure 6. Compositions of genthelvite, danalite and helvine expressed as percentages of Zn + Fe + Mn atoms.
Journal Article
Helvine-group minerals from Norwegian granitic pegmatites and some other granitic rocks: Cases of significant Sc and Sn contents Available to Purchase
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 01 May 2020
The Canadian Mineralogist (2020) 58 (3): 367–379.
...; Precambrian with Caledonian metamorphic overprint) contains Zn-rich danalite. The Ågskardet helvine contains up to 0.46 wt.% SnO 2 , and the Heftetjern ternary helvine shows a maximum of 1.74 wt.% Sc 2 O 3 . Helvine minerals were also analyzed from three occurrences connected to peralkaline granite (ekerite...
FIGURES
Image
GENTHELVITE AND DANALITE COMPOSITIONS Available to Purchase
in Genthelvite Overgrowths On Danalite Cores from a Pegmatite Miarolitic Cavity in Cheyenne Canyon, El Paso County, Colorado
> The Canadian Mineralogist
Published: 01 March 2017
TABLE 1. GENTHELVITE AND DANALITE COMPOSITIONS
Journal Article
CHROMATE ALUMINATE SODALITE, Ca 8 [Al 12 O 24 ](CrO 4 ) 2 : PHASE TRANSITIONS AND HIGH-TEMPERATURE STRUCTURAL EVOLUTION OF THE CUBIC PHASE Available to Purchase
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 01 August 2004
The Canadian Mineralogist (2004) 42 (4): 1047–1056.
... and danalite). Abstract Nous avons déterminé le comportement structural d’un composé synthétique dérivé de la sodalite, et ayant la composition Ca 8 [Al 12 O 24 ](CrO 4 ) 2 , à pression ambiante et au cours d’un chauffage entre 463 à 982°C, en utilisant la diffraction X in situ sur poudre, avec...
FIGURES
Image
SEM photomicrograph of a genthelvite overgrowth on a danalite core. Available to Purchase
in Genthelvite Overgrowths On Danalite Cores from a Pegmatite Miarolitic Cavity in Cheyenne Canyon, El Paso County, Colorado
> The Canadian Mineralogist
Published: 01 March 2017
Fig. 3. SEM photomicrograph of a genthelvite overgrowth on a danalite core.
Image
CHEMICAL COMPOSITION OF SODALITE, TUGTUPITE, DANALITE, AND HELVITE Available to Purchase
Published: 01 February 2002
TABLE 1. CHEMICAL COMPOSITION OF SODALITE, TUGTUPITE, DANALITE, AND HELVITE
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