+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

The system Fe-Nb-S and its geological implications

, : The system Fe-Nb-S and its geological implications. The Canadian Mineralogist 48.5

Phase relations within the system Fe-Nb-S were studied experimentally by the technique of evacuated silica glass tubes in the temperature interval 400-1000 degrees C. The dominant field in the system is a broad solid-solution Fe(x) Nb(y) S2 (0<x<0.5, 1.0<y<1.4) that includes the composition of the mineral edgarite. Also, it forms stable assemblages with pyrrhotite and pyrite. The iron sulfides dissolve limited amounts of Nb: pyrrhotite dissolves up to 1.13 at.% Nb, and pyrite, only 0.02 at.% Nb. We refined the crystal structure of five samples of the Fe(x) Nb(y) S2 solid solution, and established the relation between the unit-cell volume and Fe/(Fe+Nb). The occurrence of edgarite can be expected in associations with other sulfides crystallizing under extremely low fugacity of oxygen.


DOI: 10.3749/canmin.48.5.1059

Other references

Hofírek, B., 1980: The occurrence of antibodies to the glycoprotein antigen (gp70) of the enzootic leukemia virus in a leukemic herd. The serological examination of 175 head of cattle in a herd suffering from leucosis included the study of the occurrence of antibodies to the glycoprotein antigen (gp70) of the virus of enzootic leucosis (BLV). At the same time, these antibodies w...

Hearse, D.J., 1998: Myocardial stunning--ups and downs in the Dolomites. Basic Research in Cardiology 93(3): 143-144

Calderón, A.P., 1965: Letters to the Editor. Science 149(3681): 244-245

Tahir, M.A.; A.J.ssim, A.F.; Abdulla, A.H.H., 1994: Influence of live weight and castration on distribution of meat, fat and bone in the carcass of goats. Carcasses of 18 Iraqi indigenous black goats were studied. Castration had no significant effect on percentages of lean meat, fat and bone in the major cuts, neck, shoulder, loin, leg, arm and breast except for percentages of lean and bone in the r...

Verma, G.; Raje, S., 1981: Integrated multidisciplinary approach for the management of black soils of Madhy Pradesh to increase and stablize agricultural production. Improving the management of India's deep black soils: proceedings Seminar Mgt of Deep Black Soils for Increased Production of Cereals Pulses and Oilseeds New Delhi 21 May 1981 spon Indian Ministry of Agric: 06

Scott A.C., 1992: The preservation of plant fossils as a palaeoenvironmental indicator. OF

He, X.; Ying, L.; Ma, X.; Shen, Y.; Su, H.; Peng, J.; Wang, Y.; Bao, Y.; Zhou, J.; Jia, W., 2017: An additional measurement of glycated albumin can help prevent missed diagnosis of diabetes in Chinese population. In subjects who present a first fasting plasma glucose (FPG<sub>1</sub>) ≥7.0mmol/l without classic symptoms of diabetes, diagnosis of diabetes will likely be missed without an additional oral glucose tolerance test (OGTT) in the Chi...

Brazier, J.; Tumur, I.; Holmes, M.; Ferriter, M.; Parry, G.; Dent-Brown, K.; Paisley, S., 2006: Psychological therapies including dialectical behaviour therapy for borderline personality disorder: a systematic review and preliminary economic evaluation. To summarise the available evidence on the clinical effectiveness and cost-effectiveness of psychological therapies including dialectical behaviour therapy (DBT) for borderline personality disorder (BPD). Electronic databases were searched up to M...

Baker, B.L., 1969: Symptom treatment and symptom substitution in enuresis. Journal of Abnormal Psychology 74(1): 42-49

Maier, E.A., 1990: Some experiences with artificial insemination in pigs. An AI centre servicing 25 pig farms is described. The station maintains 47 Russian Large White, 21 Large Black, 16 Russian Short-eared White, 21 Duroc and 15 commercial hybrid boars. The annual output of semen per boar was sufficient to inseminate...