Results 81 to 90 of about 2,463 (203)

The Green Spots in Nephrite—Grossularite

open access: yesYankuang ceshi, 2013
Recently, a variety of nephrite with emerald green spots appeared in the nephrite market. There is no report on the mineral composition and green spots for this type of nephrite. Under a higher magnification optical microscope, the complete crystal shape,
FENG Xiao-yan   +3 more
doaj  

Graphite-tremolite rocks at Bačkovice near Jemnice (West Moravia)

open access: yes, 2016
Graphite-tremolite rocks at Bačkovice, with simple mineral assemblage (tremolite, graphite, biotite, titanite and chlorite), represent rare rocks type in the Gföhl unit (Moldanubicum).
Buriánek, David, Houzar, Stanislav
core  

Rat model demonstrates a high risk of tremolite but a low risk of anthophyllite for mesothelial carcinogenesis [PDF]

open access: yes, 2014
2014-02Asbestos was abundantly used in industry during the last century. Currently, asbestos confers a heavy social burden due to an increasing number of patients with malignant mesothelioma (MM), which develops after a long incubation period.
AIERKEN, DILINUER   +8 more
core   +1 more source

When detection and quantification of mineral fibres in natural raw materials are at their limit – the case of a clay from the Gomsiqe–Puka mining area (Albania) [PDF]

open access: yesEuropean Journal of Mineralogy
In today's global market, the movement of raw materials and goods in the free global market can lead to unintended consequences. One significant concern is the potential presence of contaminants and carcinogens, particularly when products originate from ...
A. F. Gualtieri   +12 more
doaj   +1 more source

Effect of surface dissolution by oxalic acid on flotation behavior of minerals

open access: yesJournal of Materials Research and Technology, 2019
The surface dissolution pretreatment using oxalic acid as an organic agent was applied for modifying the surface properties of minerals and improving the selectivity of ilmenite flotation from its usual accompanied gangue minerals such as olivine ...
Omid Salmani Nuri   +2 more
doaj   +1 more source

The electron spin resonance of Mn2+ in tremolite

open access: yes, 1968
The electron spin resonance of Mn2+ ion impurities in natural crystals of tremolite, 2(H2Ca2Mg5-(SiO3)8), was studied in the 9.2 GHz microwave frequency range, and at room temperature.
A. Manoogian
core   +1 more source

Geochemical, mineralogical, and geological investigation of potential gemstone occurrences with special emphasis on emerald mineralization in Saba Boru locality, Oromia region, Southern Ethiopia

open access: yesResults in Earth Sciences
The present study area is located in Saba Boru locality, Oromia Region, Southern Ethiopia. The study presents geological, geochemical, and mineralogical data collected from stream sediments and major rock types, with whole-rock samples analyzed through ...
Mustefa Seyid, Rajendran Gangadharan
doaj   +1 more source

Mineralogy of Tailings Dump around Selebi Phikwe Nickel-Copper Plant, Botswana

open access: yesJournal of Applied Sciences and Environmental Management, 2005
This study aimed at mineralogically characterizing the tailings dump emanating from the mining and smelting of nickel-copper (Ni-Cu) at Selebi Phikwe, Botswana, Southern Africa.
G Ekosse   +3 more
doaj   +1 more source

Environmental asbestos exposure from nephrite jade mining and lung cancer

open access: yesJournal of the Formosan Medical Association
Background: Nephrite is an asbestos mineral composed of tremolite and actinolite. Fengtian is a community where nephrite was mined between 1970 and 1980 and asbestos was mined between 1960 and 1985.
Hsiao-Yu Yang   +2 more
doaj   +1 more source

Tremolite-richterite amphiboles:synthesis, compositional and structural characterization, and thermochemistry

open access: yes, 1993
The substitution NaNa□-1Ca-1, which fills the A site, has been investigated in amphiboles close to the join tremolite-richterite. At 1123 K, compositions of amphiboles synthesized from bulk compositions on this binary are displaced towards magnesio ...
Navrotsky, A.   +2 more
core   +1 more source

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