Uvite Mineral Data
General Uvite Information
Chemical Formula: (Ca,Na)(Mg,Fe++)3Al5Mg(BO3)3Si6O18(OH,F)4
Composition: Molecular Weight = 970.23 gm
Sodium 0.59 % Na 0.80 % Na2 O
Calcium 3.10 % Ca 4.33 % CaO
Magnesium 5.64 % Mg 9.35 % MgO
Aluminum 13.90 % Al 26.27 % Al2 O3
Iron 4.32 % Fe 5.55 % FeO
Silicon 17.37 % Si 37.16 % SiO2
Boron 3.34 % B 10.76 % B2 O3
Hydrogen 0.31 % H 2.79 % H2 O
Oxygen 49.47 % O
Fluorine 1.96 % F 1.96 % F
- %
F -0.82 % -O=F2
______ ______
100.00 % 98.14 % = TOTAL OXIDE
Empirical Formula: Ca0.75 Na0.25 Mg2.25 Fe2+ 0.75 Al5 (BO3 )3 Si6 O18 (OH)3 F
Environment: Pegmatitic and skarn rocks.
IMA Status: Valid Species (Pre-IMA) 1929 (Dana # Changed)
Locality: Province Uva, Sri Lanka. Link to MinDat.org Location Data.
Name Origin: Named after its locality.
Name Pronunciation: Uvite
Synonym: ICSD 74189
PDF 29-342
Tourmaline
Uvite - (61.3.1.3)
Uvite Image
Images:
Uvite
Comments: Reddish brown, prismatic uvite crystals.Location: Brumado, Bahia, Brazil.
Scale: 4.5 x 5.5 cm.© Fabre Minerals
Uvite Crystallography
Axial Ratios: a:c = 1:0.4527
Cell Dimensions: a = 15.973, c = 7.231, Z = 3; V = 1,597.73 Den(Calc)= 3.02
Crystal System: Trigonal - Ditrigonal Pyramidal
X Ray Diffraction: By Intensity(I/Io ): 2.965(1), 2.577(0.9), 2.043(0.8),
Physical Properties of Uvite
Cleavage: {1011} Indistinct
Color: Yellowish brown, Brown, Blackish brown, Bluish black.
Density: 3.1 - 3.2, Average = 3.15
Diaphaneity: Translucent to opaque
Fracture: Sub Conchoidal - Fractures developed in brittle materials characterized by semi-curving surfaces.
Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Habit: Striated - Parallel lines on crystal surface or cleavage face.
Hardness: 7.5 - Garnet
Luminescence: Fluorescent, Short UV=yellow.
Luster: Vitreous - Greasy
Streak: light brown
Optical Properties of Uvite
Dichroism (e): light brown.
Dichroism (w): brown.
Gladstone-Dale: CI meas = -0.022 (Excellent) - where the CI = (1-KPDmeas /KC ) calc = -0.066 (Fair) - where the CI = (1-KPDcalc /KC )PDcalc = 0.2185,KPDmeas = 0.2095,KC = 0.205
Optical Data: Uniaxial (-), e=1.65, w=1.67, bire=0.0200.
Calculated Properties of Uvite
Electron Density: Bulk Density (Electron Density)=3.12 gm/cc
Fermion Index: Fermion Index = 0.02
Photoelectric: PEUvite = 2.92 barns/electronU=PEUvite x r Electron Density= 9.11 barns/cc.
Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)Not Radioactive
Uvite Classification
Dana Class: 61.03b.01.03 (61) Cyclosilicate Six-Membered Rings
(61.03b) with borate groups (Calcic Tourmaline Subgroup)
(61.03b.01) Liddicoatite Subgroup
61.03b.01.02 Liddicoatite ! Ca(Li,Al)3Al6(BO3)3Si6O18(O,OH,F)4 R 3m 3m
61.03b.01.03 Uvite ! (Ca,Na)(Mg,Fe)3Al5Mg(BO3)3Si6O18(OH,F)4 R 3m 3m
61.03b.01.04 Feruvite ! (Ca,Na)(Fe,Mg,Ti)3(Al,Mg,Fe)6(BO3)3Si6O18(OH)4 R 3m 3m
61.03b.01.05 Hydroxyuvite ! CaMg3(Al5Mg)(Si6O18)(BO3)3(OH)3(OH) R 3m 3m
Strunz Class: 09.CK.05 09 - SILICATES (Germanates)
09.C - Cyclosilicates
09.CK -[Si6O18]12- 6-membered single rings, with insular complex anions
09.CK.05 Chromdravite ! NaMg3(Cr,Fe)6(BO3)3Si6O18(OH)4 R 3m 3m
09.CK.05 Feruvite ! (Ca,Na)(Fe,Mg,Ti)3(Al,Mg,Fe)6(BO3)3Si6O18(OH)4 R 3m 3m
09.CK.05 Dravite NaMg3Al6(BO3)3Si6O18(OH)4 R 3m 3m
09.CK.05 Buergerite ! NaFe3Al6(BO3)3Si6O21F R 3m 3m
09.CK.05 Foitite ! []Na<0.5(Fe,Al)3Al6Si6O18(BO3)3(OH)4 R 3m 3m
09.CK.05 Liddicoatite ! Ca(Li,Al)3Al6(BO3)3Si6O18(O,OH,F)4 R 3m 3m
09.CK.05 Elbaite Na(Li,Al)3Al6(BO3)3Si6O18(OH)4 R 3m 3m
09.CK.05 Rossmanite ! []LiAl2Al6(Si6O18)(BO3)3(OH)4 R 3m 3m
09.CK.05 Olenite ! NaAl3Al6(BO3)3(Si6O18)(O,OH)4 R 3m 3m
09.CK.05 Povondraite ! (Na,K)(Fe,Fe)3(Fe,Mg,Al)6(BO3)3Si6O18(OH)4 R 3m 3m
09.CK.05 Schorl NaFe3Al6(BO3)3Si6O18(OH)4 R 3m 3m
09.CK.05 Uvite (Ca,Na)(Mg,Fe)3Al5Mg(BO3)3Si6O18(OH,F)4 R 3m 3m
09.CK.05 Vanadiumdravite ! NaMg3V6(Si6O18)(BO3)3(OH)4 R 3m 3m
09.CK.05 Magnesiofoitite ! [](Mg2Al)Al6(Si6O18)(BO3)3(OH)4 R 3m 3m
09.CK.05 Hydroxyuvite ! CaMg3(Al5Mg)(Si6O18)(BO3)3(OH)3(OH) R 3m 3m
09.CK.05 Schorl-(F) ! NaFe3Al6Si6O18)(BO3)3(OH)3(F,OH) R 3m 3m
Other Uvite Information
References: NAME( Duda&Rejl90) PHYS. PROP.(Collectors Book of Fluorescent Minerals;Dana8) OPTIC PROP.(Ford32)
See Also: Links to other databases for Uvite : Am. Min. Crystal Structure Database Amethyst Galleries' Mineral Gallery Athena CalTech Mineral Spectroscopy EUROmin Project Ecole des Mines de Paris Franklin Minerals(Dunn) GeoScienceWorld Google Images Google Scholar Handbook of Mineralogy (MinSocAm) Handbook of Mineralogy (UofA) HyperPhysics MinDAT Mineral and Gemstone Kingdom Mineralienatlas (Deutsch) Online Mineral Museum QUT Mineral Atlas Ruff.Info WWW-MINCRYST Search for Uvite using:
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Uvite
(Ca,Na)(Mg,Fe++)3Al5Mg(BO3)3Si6O18(OH,F)4 Dana No: 61.03b.01.03 Strunz No: 09.CK.05 Locality:
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Chemical Formula: 
