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Umbite

A valid IMA mineral species
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About UmbiteHide

Formula:
K2(Zr,Ti)Si3O9 · H2O
Colour:
Colourless, light yellow
Lustre:
Vitreous
Hardness:
Specific Gravity:
2.79
Crystal System:
Orthorhombic
Member of:
Name:
Named after Lake Umb, 20 km east of the type locality.
Dimorph of:
The Zr analogue of kamenevite.


Unique IdentifiersHide

Mindat ID:
4091
Long-form identifier:
mindat:1:1:4091:0
GUID
(UUID V4):
3780d23b-d46b-45f7-99ec-86de6c304b51

IMA Classification of UmbiteHide

Classification of UmbiteHide

9.DG.25

9 : SILICATES (Germanates)
D : Inosilicates
G : Inosilicates with 3-periodic single and multiple chains
59.2.1.1

59 : CYCLOSILICATES Three-Membered Rings
2 : Three-Membered Rings, hydrated
14.10.16

14 : Silicates not Containing Aluminum
10 : Silicates of Zr or Hf

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference
UmbIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of UmbiteHide

Vitreous
Transparency:
Translucent
Colour:
Colourless, light yellow
Hardness:
4½ on Mohs scale
Hardness:
VHN100=305 - 401 - Vickers
Cleavage:
Perfect
On {010}, perfect, micaceous; {100}, less perfect
Density:
2.79 g/cm3 (Measured)    2.79 g/cm3 (Calculated)

Optical Data of UmbiteHide

Type:
Biaxial (-)
RI values:
nα = 1.596(2) nβ = 1.619(2) nγ = 1.630
2V:
Measured: 80° , Calculated: 68°
Max Birefringence:
δ = 0.034
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r < v weak
Optical Extinction:
X = c; Y = b; Z = a.

Chemistry of UmbiteHide

Mindat Formula:
K2(Zr,Ti)Si3O9 · H2O
Common Impurities:
Ti,Hf,Fe,Na,F

Crystallography of UmbiteHide

Crystal System:
Orthorhombic
Class (H-M):
2 2 2 - Disphenoidal
Space Group:
P21 21 21
Cell Parameters:
a = 10.208(2) Å, b = 13.241(4) Å, c = 7.174(1) Å
Ratio:
a:b:c = 0.771 : 1 : 0.542
Unit Cell V:
969.67 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Platy crystals, flattened on (010} with the forms {010} (dominant) and {101}, {110}, and {001}.

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0012738UmbiteIlyushin G D (1993) New data on the crystal structure of umbite K2ZrSi3O9*H2O Izvestiya Akademii Nauk SSSR Neorganicheskie Materialy 29 971-97519930293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.02 Å(100b)
5.91 Å(90)
2.87 Å(80)
1.797 Å(80b)
3.31 Å(70)
6.56 Å(60b)
2.156 Å(40)
Comments:
Vuonnemiok River Valley, Russia. Data from type description.

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 4b: Highly evolved igneous rocks>3.0
35 : Ultra-alkali and agpaitic igneous rocks

Type Occurrence of UmbiteHide

Place of Conservation of Type Material:
Geology Museum, Kola Branch, Academy of Sciences, Apatity, Russia.
Mineralogical Museum, St. Petersburg University, St. Petersburg, Russia, 17072.
Mining Institute, St. Petersburg, Russia, 1631/1.
A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, 82758.
The Natural History Museum, London, England, 1994,35.
Associated Minerals at Type Locality:
Reference:
Khomyakov A P, Voronkov A A, Kobyashev Y S, Polezhaeva L I (1983) Umbite and paraumbite, new potassium zirconosilicates from the Khibina alkalic massif. Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva 112: 461-469.

Synonyms of UmbiteHide

Other Language Names for UmbiteHide

German:Umbit
Russian:Умбит
Spanish:Umbita

Relationship of Umbite to other SpeciesHide

Member of:
Other Members of this group:
KameneviteK2TiSi3O9 · H2OOrth. 2 2 2 : P21 21 21
Structurally related to group(s):

Common AssociatesHide

Associated Minerals Based on Photo Data:
1 photo of Umbite associated with VilliaumiteNaF
1 photo of Umbite associated with DjerfisheriteK6(Fe,Cu,Ni)25S26Cl
1 photo of Umbite associated with IlmeniteFe2+TiO3
1 photo of Umbite associated with AegirineNaFe3+Si2O6
1 photo of Umbite associated with MicroclineK(AlSi3O8)
1 photo of Umbite associated with NephelineNa3K(Al4Si4O16)
1 photo of Umbite associated with EudialyteNa15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2

Related Minerals - Strunz-mindat GroupingHide

9.DG.CalcinaksiteKNaCa(Si4O10) · H2OTric. 1 : P1
9.DG.Barrydawsonite-(Y)Na1.5Y0.5CaSi3O8(OH)Mon. 2/m : P21/b
9.DG.ParatobermoriteCa4(Al0.5Si0.5)2Si4O16(OH)(H2O)2 · (Ca · 3H2O)Mon. 2/m
9.DG.AlvesiteNaKZrSi6O15 · 2H2OOrth. mmm (2/m 2/m 2/m)
9.DG.02SteedeiteNaMn2[Si3BO9](OH)2Tric. 1 : P1
9.DG.02NolzeiteNaMn2[Si3BO9](OH)2 · 2H2OTric. 1 : P1
9.DG.05BustamiteCaMn2+(Si2O6)Tric. 1 : P1
9.DG.05FerrobustamiteCaFe2+(Si2O6)Tric. 1
9.DG.05PectoliteNaCa2Si3O8(OH)Tric. 1 : P1
9.DG.05SeranditeNaMn2+2Si3O8(OH)Tric. 1 : P1
9.DG.05WollastoniteCa3(Si3O9)Tric. 1 : P1
9.DG.05Wollastonite-1ACaSiO3Tric. 1 : P1
9.DG.05TanohataiteLiMn2Si3O8(OH)Tric. 1 : P1
9.DG.05SchizoliteNaCaMnSi3O8(OH)Tric. 1 : P1
9.DG.05MurakamiiteLiCa2Si3O8(OH)Tric. 1 : P1
9.DG.05DalnegorskiteCa5Mn(Si3O9)2Tric. 1 : P1
9.DG.07CascanditeCaScSi3O8(OH)Tric. 1
9.DG.08Plombièrite[Ca4Si6O16(OH)2 · 2H2O] · (Ca · 5H2O)Orth.
9.DG.10Clinotobermorite[Ca4Si6O17 · 2H2O] · (Ca · 3H2O)Mon.
9.DG.10RiversideiteCa5(HSi3O9)2 · 2H2OOrth.
9.DG.10TobermoriteCa4Si6O17(H2O)2 · (Ca · 3H2O)Mon. 2 : P21
9.DG.12JusiteNa2Ca15Al4Si16O54 · 17H2O
9.DG.12KenotobermoriteCa4Si6O15(OH)2(H2O)2 · 3H2OMon.
9.DG.15FoshagiteCa4(Si3O9)(OH)2Tric. 1 : P1
9.DG.20JenniteCa9(Si3O9)2(OH)8 · 8H2OTric. 1 : P1
9.DG.20KameneviteK2TiSi3O9 · H2OOrth. 2 2 2 : P21 21 21
9.DG.25ParaumbiteK3Zr2H(Si3O9)2 · nH2OOrth. mm2
9.DG.30SørenseniteNa4SnBe2Si6O16(OH)4Mon. 2/m : B2/b
9.DG.32Escheite Ca2NaMnTi5[Si12O34]O2(OH)3 · 12H2OOrth. mm2 : Ama2
9.DG.35XonotliteCa6(Si6O17)(OH)2Mon. 2/m : B2/m
9.DG.40HillebranditeCa2(SiO3)(OH)2Orth. mmm (2/m 2/m 2/m) : Cmcm
9.DG.45ZoriteNa8(Ti,Nb)5(Si6O17)2(OH,O)5 · 14H2OOrth.
9.DG.45ChivruaiiteCa4(Ti,Nb)5(Si6O17)2(OH,O)5 · 13-14H2OOrth. mmm (2/m 2/m 2/m) : Cmmm
9.DG.50Haineaultite(Na,Ca)5Ca(Ti,Nb)5(Si6O17)2(OH,F)8 · 5H2OOrth. 2 2 2 : C2 2 2
9.DG.55EpididymiteNa2Be2Si6O15 · H2OOrth. mmm (2/m 2/m 2/m) : Pnma
9.DG.60EudidymiteNa2Be2Si6O15 · H2OMon. 2/m : B2/b
9.DG.65ElpiditeNa2ZrSi6O15 · 3H2OOrth.
9.DG.65PatyniteNaKCa4[Si9O23]Tric. 1 : P1
9.DG.67WhelaniteCu2+2Ca6[Si6O17(OH)](CO3)(OH)3 · 2H2OOrth. mm2 : Pnn2
9.DG.70Fenaksite(K,Na)4(Fe,Mn)2(Si4O10)2(OH,F)Tric. 1 : P1
9.DG.70LitidioniteCuNaKSi4O10Tric. 1 : P1
9.DG.70ManaksiteKNaMnSi4O10Tric. 1 : P1
9.DG.70YusupoviteNa2Zr(Si6O15) · 2.5H2OMon. 2/m : B2/m
9.DG.70EnricofrancoiteKNaCaSi4O10Tric. 1 : P1
9.DG.75TinaksiteK2Na(Ca,Mn2+)2TiO[Si7O18(OH)]Tric.
9.DG.75TokkoiteK2Ca4[Si7O18(OH)](OH,F)Tric.
9.DG.75SenkevichiteCsKNaCa2TiO[Si7O18](OH)Tric. 1 : P1
9.DG.80CanasiteK3Na3Ca5Si12O30(OH)4Mon. m : Bm
9.DG.80FluorcanasiteK3Na3Ca5Si12O30F4 · H2OMon. m : Bm
9.DG.85MiseriteK1.5-x(Ca,Y,REE)5(Si6O15)(Si2O7)(OH,F)2 · yH2OTric.
9.DG.90FrankameniteK3Na3Ca5(Si12O30)(F,OH)4 · H2OTric. 1 : P1
9.DG.92Charoite(K,Sr)15-16(Ca,Na)32[Si6O11(O,OH)6]2[Si12O18(O,OH)12]2[Si17O25(O,OH)18]2(OH,F)4 · ~3H2OMon. 2/m : P21/m
9.DG.95YuksporiteK4(Ca,Na)14(Sr,Ba)2(◻,Mn,Fe)(Ti,Nb)4(O,OH)4(Si6O17)2(Si2O7)3(H2O,OH)3Mon. 2/m : P21/m
9.DG.97Eveslogite(Na,K,Ca,Sr,Ba)48 [(Ti,Nb,Mn,Fe2+)12Si48O144(OH)12](F,OH,Cl)14Mon. 2/m : P2/m

Fluorescence of UmbiteHide

Weak yellowish fluorescence under UV. Fluorescence is bright whitish-green at the temperature of liquid nitrogen.

Other InformationHide

IR Spectrum:
IR spectrum shows bands for molecular water.
Thermal Behaviour:
The X-ray pattern of material heated to 500°C is that of wadeite.
Notes:
Readily decomposed by cold 10% HCl, leaving a silica skeleton.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for UmbiteHide

References for UmbiteHide

Localities for UmbiteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Russia
 
  • Murmansk Oblast
    • Khibiny Massif
      • Eveslogchorr Mt
Arzamastsev et al. (2008)
www.mindat.org (n.d.) +2 other references
Arzamastsev et al. (2008)
33 IGC excursion No 47 +2 other references
Pekov et al. (2004)
Khomyakov et al. (1983) +2 other references
Ferraris et al. (2001) +1 other reference
Pavel.M. Kartashov (n.d.)
    • Lovozersky District
Takai et al. (2011)
 
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