Nováčekite – on Gypsum Matrix From Chihuahua, Mexico
Common Name: Nováčekite
Locality: Potosi Mine, Saint Eulalia, Chihuahua, Mexico
Formula: Mg(UO2)2(AsO4)2 · 10H2O
Fluorescence photographed at 365 and 270nm
Although it has not been documented that Nováčekite is a fluorescent mineral, this specimen is slightly fluorescent at 405nm and brightly fluorescent at approximately 270nm. It is possible that Nováčekite contains trace amounts of activator elements or impurities that respond to UV light in this manner. The specific activator responsible for the fluorescence of Nováčekite at 365nm would need to be determined through further analysis and research.
Nováčekite is a rare mineral belonging to the borate class. It was named in honor of Dr. Václav Nováček, a Czech mineralogist and professor at Charles University in Prague. First discovered in the Těšín Region of the Czech Republic, Nováčekite is a mineral characterized by its color, which ranges from pale yellow to yellow. It leaves a very pale yellow streak when tested. On the Mohs scale, Nováčekite has a hardness rating of 2 to 2½, indicating a relatively soft mineral. In terms of tenacity, it is described as waxy, suggesting a greasy or oily texture.
Shipped only with USPS Parcel Select Ground (2-8 days), wrapped in plastic, lead foil and bubble wrap in a box big enough to bring the parcel surface activity below the 0.5mR/hr shipping limit.
(the unshielded specimen itself has an activity above 70 Bq/gram)
The buyer must assume responsibility for this item and use it according to its intended purpose. Keep this away from children and store it at least five feet away from anywhere anyone spends a lot of time.
A small UV light source is included with the purchase.
This listing meets the requirements of NRC 10 CFR 40.22
It also meets U.S.P.S domestic shipping requirements for exempt limited quantities of class 7 materials according to –347.22 “are eligible under 49 CFR to be shipped as excepted packages for limited quantities” and –Exhibit 347.22 Activity Limits– and also –173.435– Table of A1 and A2 values
This item will conform to the USPS shipping restrictions when shipped.
Geiger counter not included.
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