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  2. Talc - Wikipedia

    en.wikipedia.org/wiki/Talc

    Talc, or talcum, is a clay mineral composed of hydrated magnesium silicate, with the chemical formula Mg 3 Si 4 O 10 (OH) 2. Talc in powdered form, often combined with corn starch, is used as baby powder. This mineral is used as a thickening agent and lubricant. It is an ingredient in ceramics, paints, and roofing material.

  3. List of mineral tests - Wikipedia

    en.wikipedia.org/wiki/List_of_mineral_tests

    The Mohs Hardness Scale is the main scale to measure mineral hardness. Finger nail is 2.5, copper coin is 3.5, glass is 5.5 and steel is 6.5. Hardness scale is Talc is 1, Gypsum is 2, Calcite is 3, Fluorite is 4, Apatite is 5, Orthoclase Feldspar is 6, Quartz is 7, Topaz is 8, Corundum is 9 and Diamond is 10. Odor; Not always recommended.

  4. Chlorite group - Wikipedia

    en.wikipedia.org/wiki/Chlorite_group

    Talc is much softer and feels soapy between the fingers. [4] [5] The typical general formula for chlorite is (Mg,Fe) 3 (Si,Al) 4 O 10 (OH) 2 ·(Mg,Fe) 3 (OH) 6. This formula emphasizes the structure of the group, which is described as TOT-O and consists of alternating TOT layers and O layers. [3]

  5. FDA wants new testing to detect asbestos in products with talc

    www.aol.com/news/fda-wants-testing-detect...

    Manufacturers of baby powder and cosmetic products made with talc will have to test them for asbestos under a proposal announced by the U.S. Food and Drug Administration.

  6. Mohs scale - Wikipedia

    en.wikipedia.org/wiki/Mohs_scale

    Mohs hardness kit, containing one specimen of each mineral on the ten-point hardness scale. The Mohs scale (/ m oʊ z / MOHZ) of mineral hardness is a qualitative ordinal scale, from 1 to 10, characterizing scratch resistance of minerals through the ability of harder material to scratch softer material.

  7. J&J subsidiary files for bankruptcy to advance $8 billion ...

    www.aol.com/j-j-subsidiary-files-bankruptcy...

    J&J’s Red River Talc unit made its filing in the U.S. Bankruptcy Court for the Southern District of Texas. J&J faces lawsuits from more than 62,000 claimants who alleged that its baby powder and ...

  8. Interference colour chart - Wikipedia

    en.wikipedia.org/wiki/Interference_colour_chart

    Michel-Lévy interference colour chart issued by Zeiss Microscopy. In optical mineralogy, an interference colour chart, also known as the Michel-Levy chart, is a tool first developed by Auguste Michel-Lévy to identify minerals in thin section using a petrographic microscope.

  9. Study links talc use to ovarian cancer — a potential boon for ...

    www.aol.com/news/study-links-talc-ovarian-cancer...

    The analysis can’t prove that talc causes ovarian cancer, nor does it identify a brand or chemical driving the association. Dale Sandler, one of the study’s authors and the chief of the ...