Metallographische Untersuchungen �ber das System Ag2Te x Se1?x

Bontschewa-Mladenowa, Z.; Karbanov, S.; Martschewa, N.

doi:10.1007/bf00905192

Cited by 4 publications

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“…Below 150ºC, solid (Aramov et al, 1977). High-temperature solid solution was reported to be cubic (Mikolaichuk et al, 1977) and, within the interval 70À100 mole % Ag 2 Te, hardness was estimated to be as much as 110À115 kg/mm 2 (Bontschewa-Mladenowa et al, 1972), which is close to that for kurilite.…”

Section: Relation To Other Speciesmentioning

confidence: 76%

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Kurilite – Ag₈Te₃Se – a new mineral from the Prasolovskoe deposit, Kuril islands, Russian Federation

et al. 2010

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Kurilite, with the simplified formula, Ag8Te3Se, is a new mineral from the Prasolovskoe epithermal Au-Ag deposit, Kunashir Island, Kuril arc, Russian Federation. It occurs as aggregates up to 2 mm in size, composed of brittle xenomorphic grains, up to several μm in size, in quartz, associated with tetrahedrite, hessite, sylvanite and petzite. Kurilite is opaque, grey, with a metallic lustre and a black streak. Under plane-polarized light, kurilite is white with no observed bireflectance, cleavage, or parting observed. Under crossed polars it appears isotropic without internal reflections. Reflectance values in air and in oil, are tabulated. It has a mean VHN (25 g load) of 99.9 kg/mm2 which equates roughly to a Mohs hardness of 3. Electron microprobe analyses yield a mean composition of Ag 63.71, Au 0.29, Te 29.48, Se 5.04, S 0.07, total 98.71 wt.%. The empirical formula (based on 12 atoms) is (Ag7.97Au0.02)Σ7.99Te3.00(Se0.86Te0.12S0.03)Σ1.01. The calculated density is 7.799 g/cm3 (based on the empirical formula and unit-cell parameters refined from single-crystal data). Kurilite is rhombohedral, R3 or , a 15.80(1), c 19.57(6) Å, V 4231(12)Å3, c:a 1.2386, Z = 15. Its crystal structure remains unsolved. The seven strongest lines of the X-ray powder-diffraction pattern [d in Å (I)(hkl)] are: 3.727(20)(131), 2.996(50)(232), 2.510(30)(226,422), 2.201(100)(128,416,342), 2.152(20)(603), 2.079(30)(253), 2.046(20)(336,434). The mineral is named after the locality.

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Section: Relation To Other Speciesmentioning

confidence: 76%

“…Little has been published on experimental investigations of the Ag-Se-Te system (Bontschewa-Mladenowa et al, 1972;Aramov et al, 1977). In spite of this, Aramov et al (1977) and Mikolaichuk et al (1977), in the pseudobinary system AgSeÀAgTe, reported a solidsolution at temperatures above 800ºC.…”

Section: Relation To Other Speciesmentioning

confidence: 99%

Kurilite – Ag₈Te₃Se – a new mineral from the Prasolovskoe deposit, Kuril islands, Russian Federation

et al. 2010

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ChemInform Abstract: METALLOGRAPHISCHE UNTERSUCHUNGEN UEBER DAS SYST. AG2TE(X)SE(1‐X)

Bontschewa-Mladenowa¹,

Karbanov²,

Martschewa³

1972

Chemischer Informationsdienst

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Agajanian¹

1976

Semiconducting Devices

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Metallographische Untersuchungen �ber das System Ag2Te x Se1?x

Cited by 4 publications

References 7 publications

Kurilite – Ag₈Te₃Se – a new mineral from the Prasolovskoe deposit, Kuril islands, Russian Federation

Kurilite – Ag₈Te₃Se – a new mineral from the Prasolovskoe deposit, Kuril islands, Russian Federation

ChemInform Abstract: METALLOGRAPHISCHE UNTERSUCHUNGEN UEBER DAS SYST. AG2TE(X)SE(1‐X)

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Metallographische Untersuchungen �ber das System Ag2Te x Se1?x

Cited by 4 publications

References 7 publications

Kurilite – Ag8Te3Se – a new mineral from the Prasolovskoe deposit, Kuril islands, Russian Federation

Kurilite – Ag8Te3Se – a new mineral from the Prasolovskoe deposit, Kuril islands, Russian Federation

ChemInform Abstract: METALLOGRAPHISCHE UNTERSUCHUNGEN UEBER DAS SYST. AG2TE(X)SE(1‐X)

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Kurilite – Ag₈Te₃Se – a new mineral from the Prasolovskoe deposit, Kuril islands, Russian Federation

Kurilite – Ag₈Te₃Se – a new mineral from the Prasolovskoe deposit, Kuril islands, Russian Federation