How do I identify Gottlobite?

Gottlobite can be identified by its hardness of 4.5 on the Mohs scale, Orange to orange-brown color. Look for these key characteristics when examining specimens.

What color is Gottlobite?

Gottlobite typically appears in Orange to orange-brown. Color can vary depending on impurities and formation conditions.

How hard is Gottlobite?

Gottlobite has a hardness of 4.5 on the Mohs scale. This gives it moderate hardness.

Gottlobite

A variety of Minerals

What is Gottlobite?

Gottlobite, CaMg(VO4,AsO4)(OH), is a mineral found as isolated crystals or isometric grains of orange or orange-brown color. The size of the crystals are a half millimeter in diameter and are part of the orthorhombic crystal system. Gottlobite forms a solid solution with adelite, which is an end member composition of CaMg(VO4)(OH), as well as being classified in the adelite group. Gottlobite is also part of the vanadates and arsenates group. With these characteristics, it is similar to the minerals tangeite and austinite by X-ray diffraction methods.

Gottlobite Market Value Calculator

Estimate the market value of Gottlobite using size, quality, and finish. This preview calculator is for quick context and is not a formal appraisal.

Gottlobite Localities Map

See where Gottlobite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.

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North ZoneCentral RidgeSouth Basin

Key Characteristics

Composition of Gottlobite

Analytical methods used on gottlobite to determine its chemical composition include energy-dispersive X-ray spectrometry (EDX) and wavelength-dispersive X-ray spectrometry (WDX). EDX revealed the presence and quantities of elements present in the mineral, including Ca, V, As, O and small amounts of Sr. This was then measured in terms of oxides, where the weight percents were 24.98 for CaO, 0.92 for SrO, 17.54 for MgO, 1.50 for MnO, 1.44 for CuO, 27.47 for V2O5, 20.32 for As2O5, and 5.4 for H2O. Mg is in gottlobite's chemical formula, but was not found in the EDX testing because of very similar pattern of arsenic lines that were overlapping with magnesium. The full empirical formula of gottlobite is (Ca0.93,Sr0.03)(Mg0.91,Mn0.04,Cu0.04)(V0.63,As0.37)O4O1.08H1.26. As seen in the formula, it was also determined that the arsenic and vanadium atoms are in 4-fold (tetrahedral) coordination with oxygen, and the magnesium atoms are in six-fold (octahedral) coordination.