Umbite

{{Short description|Potassium zirconosilicate mineral}}

{{Infobox mineral

| name = Umbite

| boxwidth =

| boxbgcolor =

| image = Umbite.jpg

| imagesize = 260

| alt =

| caption = Pinkish white crystals of the rare zirconium mineral umbyte named after the Lake Umb, 20 km east of the type occurrence in Vuonnemiok River Valley (Khibiny Massif, Murmansk Oblast, Russian Federation.

| category = Inosilicates

| formula = {{chem2|K2ZrSi3O9*H2O}}

| IMAsymbol = Umb{{Cite journal|last=Warr|first=L.N.|date=2021|title=IMA–CNMNC approved mineral symbols|journal=Mineralogical Magazine|volume=85|issue=3|pages=291–320|doi=10.1180/mgm.2021.43|bibcode=2021MinM...85..291W|s2cid=235729616|doi-access=free}}

| molweight =

| strunz = 9.DG.25

| system = Orthorhombic

| class = Disphenoidal (222)
H-M symbol: (222)

| symmetry = P2₁2₁2₁

| unit cell = a = 10.2 Å, b = 13.24 Å
c = 7.17 Å; Z = 4

| color = colorless, light yellow

| colour =

| habit =

| twinning =

| cleavage =

| fracture =

| tenacity =

| mohs =

| luster = vitreous

| streak =

| diaphaneity =

| gravity =

| density =

| polish =

| opticalprop =

| refractive =

| birefringence =

| pleochroism =

| 2V =

| dispersion =

| extinction =

| length fast/slow =

| fluorescence =

| absorption =

| melt =

| fusibility =

| diagnostic =

| solubility =

| impurities =

| alteration =

| other =

| prop1 =

| prop1text =

| references = [http://www.mindat.org/min-4091.html Mindat]

}}

Umbite (chemical formula {{chem2|K2(Zr,Ti)Si3O9*H2O}}) is a potassium zirconosilicate mineral found in northern Russia. Named after Lake Umb (Lake Umbozero), its type locality is Vuonnemiok River Valley, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia.[http://www.webmineral.com/data/Umbite.shtml Webmineral.com - Umbite]{{Cite web |url=http://www.handbookofmineralogy.com/pdfs/umbite.pdf |title=Handbook of Mineralogy (HOM - MSA) - Umbite |access-date=2013-01-25 |archive-date=2019-05-08 |archive-url=https://web.archive.org/web/20190508113908/http://www.handbookofmineralogy.com/pdfs/umbite.pdf |url-status=dead }}