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The 2016 convention team would like to share some material with our friends across the country about our plans for the 75th anniversary celebration of the NSS. Over the next several months, we'll post some material here that is free for any internal organization of the National Speleological Society. All we ask is that you include the credit information contained in the material. Many cavers have contributed to this collection and we'd like to recognize their efforts.
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Partly cloudy. Lows overnight in the mid 20s.
Partly cloudy skies. Low near 25F. Winds NW at 10 to 15 mph.
Some sun in the morning with increasing clouds during the afternoon. High 41F. Winds N at 15 to 25 mph. Winds could occasionally gust over 40 mph.
Last updated on
Thu, 27-Apr 8:45 pm
Stibnite, sometimes called antimonite, is a sulfide mineral with the formula Sb2S3. This soft grey material crystallizes in an orthorhombic space group. It is the most important source for the metalloid antimony. The name is from the Greek stibi through the Latin stibium as the old name for the mineral and the element antimony.
Stibnite has a structure similar to that of arsenic trisulfide, As2S3. The Sb(III) centers, which are pyramidal and three-coordinate, are linked via bent two-coordinate sulfide ions. It is grey when fresh, but can turn superficially black due to oxidation in air.
Pastes of Sb2S3 powder have been used since ca. 3000 BC as eye cosmetics in the Middle East. It was used to darken the brows and lashes, or to draw a line around the perimeter of the eye. Antimony trisulfide finds use in pyrotechnic compositions, namely in the glitter and fountain mixtures.