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Hemimorphite

Named in reference to the mineral’s hemimorphic morphology as having different crystalline forms at the end of each of its crystallographic axes. Hemimorphite is relatively common and forms as a secondary mineral in oxidized zinc-rich mineral deposits. Localities for good material are in Romania, Slovakia, England, Belgium, Germany, Russia, Iran, the United States, and Mexico, and there are many other additional localities. Hemimorphite is strongly pyroelectric, generates a charge in response to heat, and can also fluoresce a blue color under short-wave ultraviolet light.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/hemimorphite.pdf

Hendricksite

Phyllosilicate - Monoclinic - Mica group member. Ordinary (True or Common) Mica - Trioctahderal. Zinc occupies the (M) octahedral sites between the layers of (T) sites of Si and Al. K is the interlayer, making this an ordinary (True) mica. For more information on Mica minerals and other phyllosilicates please reference our article - Click Here.

Hendricksite is the only zinc bearing mica. Occurs as plate-shaped or short prismatic crystals with rough terminations up to 40cm with a copper deep red to blackish red color. (Bernard & Hrysl). As pointed out by Reider et al (Can Min.), Hendricksite could be included in a solid solution series with "zincohendricksite" and "manganoanhendricksite" at the ends.

Phyllosilicate - Monoclinic - Mica group member. Ordinary (True or Common) Mica - Trioctahderal. Zinc occupies the (M) octahedral sites between the layers of (T) sites of Si and Al. K is the interlayer, making this an ordinary (True) mica. For more information on Mica minerals and other phyllosilicates please reference our article - Click Here.

Occurs as plate-shaped or short prismatic crystals with rough terminations up to 40cm with a copper deep red to blackish red color. (Bernard & Hrysl). As pointed out by Reider et al (Can Min.), Hendricksite could be included in a solid solution series with "zincohendricksite" and "manganoanhendricksite" at the ends.

Henmilite

Named for Professor Kitinosuke Henmi and his daughter Dr. Chiyoko Henmi, who both worked for the Department of Earth Science at Okayama University in Japan, for their work at the skarn deposit at Fuka. Henmilite is a rare mineral that can be found only at its type locality at the Fuka mine in Okayama on Honshu Island, Japan. It occurs there in cavities in borate veins that are within a contact-metasomatized limestone.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/henmilite.pdf

Herderite

Named in honor of Siegmund August Wolfgang von Herder, a mining official of Freiberg, Germany. Herderite is difficult, if not nearly impossible to distinguish from its hydroxyl-dominant analogue hydroxylherderite. While found originally in Germany, the analysis of this initial material is suspect and additional material from the locality is now unavailable. A gem of Herderite from supposedly Brazil is the only known fluorine-dominant Herderite that has been proven via modern analytical methods, so it is likely that most Herderite is actually hydroxylherderite. Herderite will fluoresce violet under ultraviolet light and has a cathodoluminescence and phosphorescence of pink-orange in X-rays.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/herderite.pdf

Hessite

Named for Germain Henri Hess (1802-1850). Occurs within low to medium temperature vein deposits. Can also be found in massive pyrite deposits. Crystals are usually distorted or irregular, pseudocubic and modified, sectile, opaque grey to dark grey. sometimes shiny silvery. Localities for Hessite include in Romania, Kazakhstan, Russia, Norway, Australia, Fiji, the Philippines, Chile, the United States, Canada, and others.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/hessite.pdf

Heteromorphite

Named for the Greek words eteros, meaning “hetero” or “different,” and morphi, meaning “form,” in reference to the difference between the mineral and a proposed dimorphous species. Hetermophite is of hydrothermal origin and can be found in Germany, the Czech Republic, Mexico, and newer localities in England, Tajikistan, Slovakia, Romania, Kyrgyzstan, Japan, Hungary, Greece, Bulgaria, Bolivia, and Austria.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/heteromorphite.pdf

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