The crystal structure of kôzulite, an Mn-rich alkali amphibole with the ideal formula NaNa(2)[Mn(4) (2+)(Fe(3+),Al)]Si(8)O(22)(OH)(2), tris-odium tetra-manganese iron/aluminium octa-silicate dihydroxide, was refined from a natural specimen with composition (K(0.20)Na(0.80))(Na(1.60)Ca(0.18)Mn(2+) (0.22))(Mn(2+) (2.14)Mn(3+) (0.25)Mg(2.20)Fe(3+) (0.27)Al(0.14))(Si(7.92)Al(0.06)Ti(0.02))O(22)[(OH...

A lung cancer case-control study was conducted in a Slovenian asbestos-cement factory for which unusually good records of asbestos exposures were available. The cohort consisted of all 6714 workers employed at the Salonit Anhovo factory after 31 December 1946 who worked there for at least one day between 1964 and 1994. Fifty-eight histologically confirmed cases of primary lung cancer and 290 co...

Virtually all available data on persistence of naturally occurring mineral fibers in human lungs have been derived from studies of asbestos fiber loads. These studies indicate that, although both amphibole and chrysotile asbestos fibers are found in the lungs of the general population and exposed workers, amphibole fibers are universally present in disproportionately large and chrysotile fibers...

Introduction: Amphibole has been reported from a few groups of Martian meteorites (basaltic, lherzolitic and dunitic groups) [1-4]. They are always present within a magmatic inclusion trapped in pyroxene and olivine in spite of the large difference of the host petrology. Their mineral compositions are almost identical to one another and are kaersutitic. So far, only observations by optical micr...

High-resolution transmission-electron microscopy (HRTEM) and infrared spectroscopy (FTIR) analyses have been done on amphiboles near the join tremolite [Ca2Mg5Si8O22(OH)2 = TR]-pargasite [NaCa2Mg4Al3Si6O22(OH)2 = PG] in the ternary system tremolite-pargasite-cummingtonite [Mg7Si8O22(OH)2 = MC] that were synthesized previously by Sharma and Jenkins (1999). Representative samples across the join ...

Abstract Amphibole-dominated dehydration melting of gabbro is the primary process responsible for genesis adakites, low-K tonalites, modern trondhjemites, and plagiogranites as well Archean tonalite-trondhjemite-granodiorite suites that represent earliest examples continental crust. Previous literature has mostly focused on role Al-rich amphibole during anatexis a mafic source many these studie...

The mineralogy and chemistry of the less than 20μm fraction of marine sediments at Morphou Bay, north-west Cyprus, are presented to characterise fine-grained sediment supplies from basic and ultrabasic rocks of the Troodos Massif within a typological setting. The sediments comprise a mixture of smectite, illite, kaolinite and iron rich chlorite. They also contain amorphous iron oxides/hydroxide...

BACKGROUND Fibrous tremolite is a widespread amphibole asbestiform mineral, airborne fibres of which constitute an environmental hazard in Libby, Montana, northern California, and elsewhere. AIMS To determine excess risk from lung cancer, mesothelioma, and all-cause mortality in a cohort of men exposed to tremolite, but no other form of asbestos. METHODS Mortality by certified cause and var...

Triassic eclogite and blueschist facies rocks occur as a thrust sheet, 25-km long and over 2-km thick, in an Eocene fold-andthrust belt in northwest Turkey along the İzmir–Ankara suture. The thrust sheet consists mainly of metabasites with minor marble, phyllite and metachert, and rare lenses of serpentinite. The common blueschist facies mineral assemblage in the metabasites is sodic amphibole ...