div Xanthoconite is a monoclinic dimorph of the mineral Proustite . It is a very rare... More
Xanthoconite is a monoclinic dimorph of the mineral Proustite. It is a very rare mineral and only forms in very small crystals. Xanthoconite generally forms in the same deposits as Proustite, and may even form together with it in a single matrix. In addition to their differences in crystal symmetry, Xanthoconite usually has a more orange color than Proustite.
Xanthoconite is named after a combination of two Greek words: "xanthos", meaning yellow, and "konis", meaning powder, alluding to the yellowish color of this minerals streak.
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div Xenotime describes a group of several closely related phosphates , arsenates , an... More
Xenotime describes a group of several closely related phosphates, arsenates, and vanadates composed of rare earth elements. The term is generally used to describe the most common member of the group, Xenotime-(Y), which is the yttrium phosphate end member of this series. Other, rarer members of the Xenotime series include Xenotime-(Yb), Cherovite, and Wakefieldite.
The name Xenotime is derived from an odd source. Its name was given by French mineralogist François Sulpice Beudant after the Greek words " Xenos" meaning stranger, and " Time" meaning honor, to debunk the theory proposed by chemist Jacob Berzelius that the yttrium in this mineral is in fact a new, undocumented element.
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