1-20 OF 34 RESULTS FOR

trechmannite

Results shown limited to content with bounding coordinates.
Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
×Close Modal
Sort by
Journal Article
Published: 01 August 1968
American Mineralogist (1968) 53 (7-8): 1208-1214.
...George W. Roland AbstractA phase of AgAsS2 composition prepared by crystallizing AgAsS2 glass at 290°C for 315 hours is identical to the rare sulfosalt mineral trechmannite. The synthetic material is hexagonal (rhombohedral) and least-squares refinement of X-ray powder-dif-fraction data yields...
Journal Article
Published: 01 February 1989
American Mineralogist (1989) 74 (1-2): 243-249.
...L. Taras Bryndzia; O.J. Kleppa AbstractHigh‐temperature direct‐synthesis calorimetry of the silver thioarsenite minerals smithite (AgAsS2), trechmannite (AgAsS2), and proustite (Ag3AsS3) at 793 K yielded mean values for the standard enthalpy of formation from the elements of −59.1 ± 2.3,−74.77...
Journal Article
Published: 01 July 2013
Journal of Paleontology (2013) 87 (4): 726-754.
...Jose Maria Pons; Enric Vicens; Angélica Oviedo; Javier Aguilar; Pedro García-Barrera; Gloria Alencáster AbstractA Maastrichtian rudist fauna composed of the radiolitids Biradiolites aguilerae Böse, B. Cárdenasensis Böse, Huasteca ojanchalensis (Myers), Tampsia floriformis Myers, and Trechmannites...
FIGURES | View All (25)
Journal Article
Published: 01 February 2006
The Canadian Mineralogist (2006) 44 (1): 135-140.
..., such as hutchinsonite, hatchite, edenharterite, trechmannite, tennantite, and abundant realgar and rathite, generally occurring as idiomorphic crystals in cavities of a Triassic dolomitic rock. The whole region was transformed during the Alpine orogeny to the greenschist to garnet-amphibolite facies of metamorphism...
FIGURES
Journal Article
Journal: Economic Geology
Published: 01 May 1970
Economic Geology (1970) 65 (3): 241-252.
... encountered: proustite and xanthoconite (both Ag 3 AsS 3 ), smithite and trechmannite (both AgAsS 2 ), and Ag 7 AsS 6 . The phase relations of proustite were studied in detail. The maximum temperatures at which proustite can coexist with either Ag 7 AsS 6 , Ag 2 S, As, or smithite are, respectively, 480...
Image
<b>Trechmannites</b> rudissimus  ( Trechmann, 1924 ), stereo pairs of bivalve spec...
Published: 01 July 2013
Figure 13 Trechmannites rudissimus ( Trechmann, 1924 ), stereo pairs of bivalve specimens, scale bar=10 mm: 1, 2 , PUAB 81099, Amoladeras, upper and ventral-posterior views respectively; 3 , IGM 9448, Amoladeras, ventral-posterior view; 4 , PUAB 81104, Amoladeras, ventral-posterior view
Image
<b>Trechmannites</b> rudissimus  ( Trechmann, 1924 ), transverse sections of right...
Published: 01 July 2013
Figure 14 Trechmannites rudissimus ( Trechmann, 1924 ), transverse sections of right valves, scale bar=10 mm: 1 , PUAB 81128, Cárdenas 3, close below the commissural plane showing myocardinal elements; 2 , IGM 9449, Amoladeras; 3 , IGM 9445, Amoladeras; 4 , IGM 9443, Amoladeras; 5 , IGM
Image
<b>Trechmannites</b> rudissimus  ( Trechmann, 1924 ), thin sections of outer shell...
Published: 01 July 2013
Figure 15 Trechmannites rudissimus ( Trechmann, 1924 ), thin sections of outer shell layer of right valves, enlarged areas are indicated, scale bars=10 mm: 1 , 3 , 5 , 7 , PUAB 81108, Amoladeras; 2 , 4 , 6 , 8 , PUAB 81128, Cárdenas 3; 1, 2 , radial sections, inner margin at right
Journal Article
Published: 01 June 2015
Mineralogical Magazine (2015) 79 (3): 687-694.
...L. Bindi; F. Nestola; S. Graeser; P. Tropper; T. Raber AbstractEckerite, ideally Ag2CuAsS3, is a new mineral from the Lengenbach quarry in the Binn Valley, Valais, Switzerland. It occurs as very rare euhedral crystals up to 300 μm across associated with realgar, sinnerite, hatchite, trechmannite...
FIGURES
Journal Article
Published: 01 October 2012
Mineralogical Magazine (2012) 76 (5): 1153-1163.
..., realgar, hatchite and probable trechmannite, edenharterite, jentschite and two unidentified sulfosalts. Raberite is opaque with a metallic lustre and has a dark brown–red streak. It is brittle with a Vickers hardness (VHN10) of 52 kg mm−2 (range 50–55) corresponding to a Mohs hardness of 2½–3...
FIGURES | View All (6)
Journal Article
Published: 01 June 2012
Mineralogical Magazine (2012) 76 (3): 743-750.
..., associated with realgar, rutile, trechmannite and hutchinsonite. Debattistiite is opaque with a metallic lustre and a grey streak. It is brittle; the Vickers hardness (VHN25) is 80 kg mm−2 (range: 65–94), corresponding to a Mohs hardness of 2–2½. In reflected light debattistiite is dark grey, highly...
FIGURES
Image
Bond lengths  versus  electron density at the bond critical point for the v...
Published: 01 February 2010
), trechmannite (crosses) and proustite (open circles).
Image
Phase diagrams for the Ag 2 S-Cu 2 S-AgSbS 2 -CuSbS 2  and Ag 2 S-Cu 2 S-Ag...
Published: 01 January 2006
) 5 SbS 4 ; lautite ( lt ), ~ (Cu,Ag)AsS; tennantite ( tnn ), ~ (Cu,Ag) 12+x As 4+y S 13 ; phase A ( A ), ~ (Cu,Ag) 24 As 12 S 30 ; sinnerite ( sin ), ~ (Cu,Ag) 6 As 4 S 9 ; smithite ( smt ) ~ (Ag,Cu)AsS 2 ; trechmannite (tmt), ~ (Ag,Cu)AsS 2 ; arsenostephanite ( As-st ), ~ (Ag,Cu) 5 AsS 4 . [Used
Journal Article
Published: 01 February 2010
The Canadian Mineralogist (2010) 48 (1): 155-162.
...), trechmannite (crosses) and proustite (open circles). ...
FIGURES | View All (4)
Journal Article
Published: 01 July 2015
American Mineralogist (2015) 100 (7): 1649-1654.
... zone 1 of the quarry in cavities in saccharoidal dolomitic marble. It occurs as euhedral elongated black opaque metallic crystals up to 0.15 mm without inclusions or intergrowths of other minerals on hatchite/wallisite in association with yellowish fibrous smithite, realgar, trechmannite, edenharterite...
Journal Article
Published: 01 October 2013
The Canadian Mineralogist (2013) 51 (5): 727-734.
...) – pyrostilpnite (by Dana in 1868), as well as trechmannite (described by Solly in 1904) – smithite (by the same author in 1905). Miargyrite was described by Rose in 1829, whereas the isochemical cubic cuboargyrite was redefined by Walenta (1998) ; matildite was recognized by D’Achiardi in 1883, whereas...
FIGURES
Journal Article
Published: 01 May 2002
American Mineralogist (2002) 87 (5-6): 753-764.
...), arsenopyrite (As K α), and bismuthinite (Bi L α). The results are compiled in Table 2 . Several minerals with the chemical formula AgMS 2 (M = As, Sb, Bi) have previously been described: (1) M = As: monoclinic smithite ( Hellner and Burzlaff 1964 ), trigonal trechmannite ( Matsumoto and Nowacki 1969 ); (2) M...
FIGURES | View All (6)
Journal Article
Published: 01 October 2013
Mineralogical Magazine (2013) 77 (7): 3039-3046.
... the synvolcanogenic hydrothermal activity. Brittle deformation, fractured porphyroblasts of pyrite and especially the silica bands modified the original situation. Fractures host veinlets that contain a number of Ag-As-Sb-Pb-rich sulfosalts: tetrahedrite-tennantite, stephanite, pyrargyrite, trechmannite, smithite...
FIGURES
Series: Special Publications of the Society of Economic Geologists
Published: 01 January 2001
DOI: 10.5382/SP.08.10
EISBN: 9781629490328
.... According to the miargyrite-smithite/trechmannite phase diagram of Ghosal and Sack (1995) , the As/(As + Sb) ratio in miargyrites can be used to estimate the minimum formation temperature (Fig. 14 ). These temperature estimations were obtained plotting the highest As/(As + Sb) value of each sample onto...
FIGURES | View All (19)
Journal Article
Published: 01 February 2016
American Mineralogist (2016) 101 (2): 487-492.
... developed silica bands. Pyrite, sphalerite, galena, tetrahedrite-tennantite, and stibnite were deposited during the synvolcanogenic hydrothermal activity of Cretaceous age. Fractures host veinlets with Ag-As-Sb-Pb-rich sulfosalts: tetrahedrite-tennantite, stephanite, pyrargyrite, trechmannite, smithite...