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Reinhardbraunsite
A valid IMA mineral species
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![Ca5(SiO4)2(OH,F)2](#"/photo-774134.html"><img src="/image.pl?url=https%3a%2f%2fwww.mindat.org%2fimagecache%2fe3%2f1f%2f03142820017271926218243.jpg&f=jpg&w=240" alt="03142820017271926218243.jpg" /></a><div><b>Reinhard Brauns</b></div></div></div><div><div><span>Formula:</span><div class=){kind=link}
Colour:
Pale pink
Lustre:
Vitreous
Hardness:
5 - 6
Specific Gravity:
2.85
Crystal System:
Monoclinic
Member of:
Name:
Named in honor of Dr. Reinhard Brauns (20 August 20, 1867, Eiterfeld, near Cassel, Germany - 28 January 1937), Professor of Mineralogy and Petrography at the University of Bonn. He had over 200 publications on different aspects of mineralogy and petrography including studies on the optical anomalies of crystals, a treatise on chemical mineralogy, the properties of gem minerals, and many articles dealing with the rocks and minerals of the volcanic areas of the Rheinland and the famous Laacher See district.
Reinhardbraunsite is a mineral in thehumite Group. It is the (OH)-dominant member in a series withKumtyubeite. The Reinhardbraunite-Kumtyubeite series form the Ca-dominant equivalent of thechondrodite-hydroxylchondrodite series. A mineral with a reinhardbraunsite composition was synthesized in 1958 and named calciochondrodite, but the naturally occurring mineral was given the name reinhardbraunsite upon its discovery in 1983.
Reinhardbraunsite is, like all Ca-humites, a product of high-temperature and low-pressure environments, and it is a product of contact metamorphism between high-temperature magma/lava flows and carbonate rocks.
Reinhardbraunsite is, like all Ca-humites, a product of high-temperature and low-pressure environments, and it is a product of contact metamorphism between high-temperature magma/lava flows and carbonate rocks.