What's the difference between actinolite and uralite?
Actinolite
Definition:
(n.) A bright green variety of amphibole occurring usually in fibrous or columnar masses.
Example Sentences:
(1) A study was conducted to estimate the exposure-response relationship for tremolite-actinolite fiber exposure and radiographic findings among 184 men employed at a Montana vermiculite mine and mill.
(2) Fibrous actinolite was found in unexpanded Montana vermiculite ore at a maximum concentration of 2.0%.
(3) In the control group, predominant fibers were tremolite or actinolite.
(4) Actinolite was also found in the Virginia vermiculite ore but at a lower concentration and mostly as cleavage fragments with low length-to-width ratios.
(5) Health effects have been documented among American vermiculite workers who mined and processed vermiculite contaminated with amphibole asbestos, viz., tremolite-actinolite.
(6) By contrast, tremolite and actinolite constituted the majority of uncoated fibers in these cases.
(7) A dose of 0.25 mg actinolite or UICC chrysotile induced tumours of the peritoneum in more than 50% of the animals.
(8) Polyvinyl-pyridine-N-oxide prolonged the tumour latency after injection of actinolite.
(9) The mean length for bodies formed on chrysotile was 35 micron, and for bodies formed on tremolite or actinolite, 36 micron.
(10) Analysis of lung mineral content revealed background levels of chrysotile but an elevated level of tremolite and actinolite asbestos.
(11) The three groups did not differ significantly with respect to lung burden of chrysotile or tremolite and actinolite, but Group III had a lung burden of amosite and crocidolite that was three orders of magnitude greater than in Groups I and II, with no overlap.
(12) The major types of core fibres of ferruginous bodies were found to be asbestos, including amosite, crocidolite, chrysotile and the tremolite-actinolite series, but a small number of fibres of materials other than asbestos were also detected.
(13) The vermiculite ore and concentrate of a mine and mill near Libby, Montana, was found to be contaminated with fibrous tremolite-actinolite.
(14) The latter had a geometric mean length of 3.7 microns, a value considerably longer than we have found for tremolite and actinolite from Quebec chrysotile miners but roughly the same as the mean length of amosite and crocidolite in workers with occupational amphibole exposure.
(15) Fibrous dusts (chrysotile, glass fibers, nemalite, palygorscite, and gypsum) and granular dusts (actinolite, biotite, hematite, pectolite, sanidine, and talcum) were injected intraperitoneally into rats.
(16) The types of asbestos fibers were chrysotile, amosite, crocidolite, actinolite and tremolite.
(17) Mineralogic analysis of four cases showed that 46 of 72 (64%) bodies isolated and examined contained chrysotile cores, and 21 of 72 (29%) bodies contained cores of the amphiboles tremolite and actinolite.
(18) No tremolite or actinolite fibers of length greater than 8 microns microns and width less than 0.25 micron were observed.
(19) On the other hand, tremolite and actinolite fibers constituted non-beaded club-like type II or type IV bodies and tended to have a larger diameter than that of amosite or anthophyllite fibers (p less than 0.005).
(20) Persistent glass fibres were less effective than actinolite having a similar fibre size distribution.
Uralite
Definition:
(n.) Amphibole resulting from the alternation of pyroxene by paramorphism. It is not uncommon in massive eruptive rocks.