vanadiocarpholite

{{Infobox mineral | name = Vanadiocarpholite | boxwidth = | boxbgcolor = | image = | imagesize = | alt = | caption = | category = Silicate mineral | formula = Mn2+V3+AlSi2O6(OH)4 | IMAsymbol = Vcar | molweight = | strunz = 9.DB.05 | dana = | system = Orthorhombic | class = Dipyramidal (mmm) H-M symbol: (2/m 2/m 2/m) | symmetry = Ccca | unit cell = a = 13.83 Å, b = 20.681 Å c = 5.188 Å; Z = 8 | color = Pale-straw yellow, honey-yellow to brown | colour = | habit = Prismatic to acicular crystal clusters, vein fillings | twinning = | cleavage = Perfect on {010} | fracture = | tenacity = Flexible | mohs = | luster = Vitreous, silky | streak = | diaphaneity = Transparent | gravity = | density = | polish = | opticalprop = Biaxial (+) | refractive = nα=1.684, nβ=1.691, nγ=1.7 | birefringence = 0.0160 | pleochroism = | 2V = | dispersion = | extinction = | length fast/slow = | fluorescence = | absorption = | melt = | fusibility = | diagnostic = | solubility = | impurities = | alteration = | other = | prop1 = | prop1text = | references = }}

Vanadiocarpholite (Mn2+V3+AlSi2O6(OH)4) is straw yellow to brown silicate mineral. It crystallizes in the orthorhombic crystal system. It is the vanadium rich variety of carpholite (Mn2+Al2Si2O6(OH)4).