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talc
talc
talc A member of the 2:1
phyllosilicates (sheet silicates) with composition Mg
6[Si
4O
10]
2(OH)
4; sp. gr. 2.58–2.83;
hardness 1 (it has the lowest hardness on
Mohs's scale of hardness);
monoclinic; rare crystals are
tabular, often
massive; white to green;
cleavage perfect {001}; massive talc (soapstone or steatite) can be formed during the low-grade
metamorphism of siliceous
dolomites; and as a
secondary mineral during
hydrothermal alteration of
ultrabasic igneous rocks along shear planes. It is associated with
serpentization with
serpentine changing to talc and
magnetite by addition of CO
2. It is used extensively as a mineral filler.
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Talc pleurodesis; acute normovolemic hemodilution; laparoscopic cholecystectomy; blood ultrafiltration.(EVIDENCE FOR PRACTICE)(Disease/Disorder overview)
Magazine article from: AORN Journal; 2/1/2007; ; 700+ words
; Pleurodesis using talc poudrage versus talc slurry European Journal of Cardio-thoracic Surgery December...Corynebacterium parvum, quinacrine, tetracycline, iodopovidone, and talc, numerous clinical studies have been published supporting the...
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Talc: shape and form meet function.
Magazine article from: Paint & Coatings Industry; 1/1/2003; ; 700+ words
; ...a natural blend of talc, tremolite, serpentine...anthophyllite. Platy talcs can be further classified...chlorite in order for a talc product to attain...fineness. Tremolitic talcs exploit the properties...together with the talc. The platy talcs used by the coatings...
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Talc and Pyrophyllite
Magazine article from: Mining Engineering; 6/1/2001; ; 700+ words
; ...G.P. TOMAINO, Minerals Technologies Talc is a layered, hydrous magnesium silicate...soapy feel and typically a smooth texture. Talc is also known for its insulation, heat...absorption and strong covering quality. Talc, Mg^sub 3^Si^sub 4^O^sub 10...
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Talc and pyrophyllite
Magazine article from: Mining Engineering; 6/1/2000; ; 700+ words
; Talc is a layered, hydrous, magnesium-silicate...soapy feel and typically a smooth texture. Talc is known for its insulation, heat resistance...Pyrophyllite has physical properties similar to talc. Talc, Mg^sub 3^Si^sub 4^O^sub...
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TALC AND PYROPHYLLITE
Magazine article from: Mining Engineering; 6/1/2005; ; 700+ words
; Talc is a layered, hydrous magnesium silicate...soapy feel and typically a smooth texture. Talc is also known for its insulation, heat resistance...oil absorption and strong covering quality. Talc, Mg^sub 3^Si^sub 4^O^sub 10...
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Talc pleurodesis: A new technique
Magazine article from: The American Surgeon; 5/1/2001; ; 700+ words
; ...Although several chemical agents are used talc has only recently been advocated as the sclerosing agent of choice. Talc can be administered via open thoracotomy...technique of thoracoscopically applied talc pleurodesis that is easy, inexpensive...
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Talc as a dispersion aid for reinforcing fillers in rubber.
Magazine article from: Rubber World; 3/1/2008; ; 700+ words
; Talc has been shown to be a homogenizing agent...The addition of a small percentage of talc significantly reduces the size of the dispersed...figure 1. These observations suggest that talc might compatibilize or homogenize blends of...
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Talc's safe and effective
Newspaper article from: New Straits Times; 8/13/2000; 700+ words
; New Straits Times 08-13-2000 Talc's safe and effective Edition: New Sunday...Cosmetics & You POWDERS based on talc have been used as medicinal products for...baby powder and in similar body powders is talc. Talc is a truly unique ingredient. It...
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Pulmonary talc granulomas, pulmonary fibrosis, and pulmonary hypertension resulting from intravenous injection of talc-containing drugs intended for oral use.
Magazine article from: Baylor University Medical Center Proceedings; 7/1/2002; ; 700+ words
; Talcosis or talc pneumoconiosis is an uncommon form of pulmonary...inhalation of relatively low concentrations of talc dust over a long period or exposure to very...talcum powder containing approximately 93% talc (3). Baby powder, consisting mainly...
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Talc de Luzenac France celebrates 100 years of incorporation
Magazine article from: Mining Engineering; 11/1/2005; ; 489 words
; Talc de Luzenac France is celebrating 100 years of incorporation this year. The company operates the world's largest talc deposit at Luzenac, Ariege in southwest France. Talc de Luzenac France is also the original member of the Luzenac...
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talc
Book article from: The Columbia Encyclopedia, Sixth Edition
talc mineral ranging in color from white through various shades...Soapstone , or steatite, is a massive, granular form of talc. French chalk is a fine-grained variety. Talc is usually associated with chlorite schists, serpentine...
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talc schist
Book article from: A Dictionary of Earth Sciences
talc schist A regional metamorphic rock composed predominantly of talc , and displaying a schistosity . The rock forms by the metamorphism and deformation of ultrabasic igneous rocks in regional terranes .
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Mohs' Scale
Book article from: World of Earth Science
...10). The reference minerals are (1) talc, (2) gypsum , (3) calcite, (4...10) diamond . The softest mineral, talc, can be used in body powder. The hardest...Mohs' hardness number 2) will scratch talc (Mohs' hardness number 1). Talc, however...
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Mohs’ Scale
Encyclopedia entry from: The Gale Encyclopedia of Science
...10). The reference minerals are (1) talc, (2) gypsum, (3) calcite, (4...instead of feldspar). The softest mineral, talc, can be used in body powder. The hardest...x2019; hardness number = 2) will scratch talc (Mohs ’ hardness number = 1...
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hardness
Book article from: The Columbia Encyclopedia, Sixth Edition
...certain minerals in order of hardness: talc, 1; gypsum, 2; calcite, 3; fluorite...e., capable of scratching—talc (hardness=1). The listing does not indicate that gypsum (2) is twice as hard as talc (1). The hardness of many minerals falls...
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