Tag: energon

underthescopemineral:

Cavansite

CaV⁴⁺OSi₄O₁₀·4H₂O

Locality:

Wagholi Quarries, Wagholi, Pune District (Poonah District), Maharashtra, India

Blue cavansite crystal on white stilbite in a 2.4 mm field of view.

Pasquale Antonazzo’s Photo

Cavansite, whose name is derived from its chemical composition, calcium vanadium silicate, is a deep blue hydrous calcium vanadium phyllosilicate mineral, occurring as a secondary mineral in basaltic and andesitic rocks along with a variety of zeolite minerals. Cavansite is a relatively rare mineral.  While cavansite does contain vanadium, and could thus be a possible ore source for the element, it is not generally considered an ore mineral. However, because of its rich colour and relative rarity, cavansite is a sought after collector’s mineral.

rudescience:

Chemiluminescence of “Luminol”

To exhibit its luminescence, the luminol must be activated with an oxidant. Usually, a solution containing hydrogen peroxide (H₂O₂) and hydroxide ions in water is used as the activator. In the presence of a catalyst such as an iron or periodate compound, the hydrogen peroxide is decomposed to form oxygen and water:

2H₂O₂ → O₂ + 2 H₂O

H₂O₂ + KIO₄ → KIO₃ + O₂ + H₂O 

In a laboratory setting, the catalyst used is often potassium ferricyanide or potassium periodate. In the forensic detection of blood, the catalyst is the iron present in hemoglobin. Enzymes in a variety of biological systems may also catalyze the decomposition of hydrogen peroxide.

When luminol reacts with the hydroxide ion, a dianion is formed. The oxygen produced from the hydrogen peroxide then reacts with the luminol dianion. The product of this reaction, an organic peroxide, is very unstable and is made by the loss of a nitrogen, the change of electrons from excited state to ground state, and the emission of energy as a photon. This emission produces the blue glow. – Wiki

Giffed by: rudescience  From: This video