Uhligite Mineral Data

General Uhligite Information

Chemical Formula:

Ca3(Ti,Al,Zr)9O20

Composition:

Molecular Weight = 883.91 gm

Calcium 13.60 % Ca 19.03 % CaO

Zirconium 15.48 % Zr 20.91 % ZrO₂

Titanium 27.08 % Ti 45.18 % TiO₂

Aluminum 7.63 % Al 14.42 % Al₂O₃

Oxygen 36.20 % O

______ ______

100.00 % 99.55 % = TOTAL OXIDE

Empirical Formula:

Ca₃Ti₅Al_2.5Zr_1.5O₂₀

Environment:

Nepheline-syenite rocks. Uhligite (1909) is now considered to be perovskite or zirkelite (?)

IMA Status:

Discredited IMA 2006

Locality:

Lake Magad, Rift Valley, Tanganyika Territory, Kenya, East Africa. Link to MinDat.org Location Data.

Name Origin:

Named for Alfred Louis Johannes Uhlig (1883-1919), German geologist, leader of the African expedition in which the material was first collected.

Name Pronunciation:

Uhligite

Uhligite Image

Images:

Uhligite

Comments: Black granular uhligite in syenite rock.
Location: near Lake Magadi, Rift Valley Province, Kenya. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Uhligite Crystallography

Cell Dimensions:

a = 7.639, Z = 1; V = 445.77 Den(Calc)= 3.29

Crystal System:

IsometricSpace Group: Unk

Physical Properties of Uhligite

Cleavage:

{001} Imperfect

Color:

Black.

Density:

4.15

Diaphaneity:

Subtranslucent to opaque

Fracture:

Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).

Habit:

Octahedral Crystals - Occurs as octahedral shaped crystals.

Habit:

Striated - Parallel lines on crystal surface or cleavage face.

Habit:

Twinning Common - Crystals are usually twinned.

Hardness:

5.5 - Knife Blade

Luster:

Metallic

Streak:

brownish gray

Optical Properties of Uhligite

Optical Data:

NCalc= 1.96 - from Gladstone-Dale relationship (KC = 0.2915) where Ncalc=Dcalc*KC+1
NCalc= 2.21 - from Gladstone-Dale relationship (KC = 0.2915) where Ncalc=Dmeas*KC+1

Calculated Properties of Uhligite

Electron Density:

Bulk Density (Electron Density)=3.15 gm/cc
note: Specific Gravity of Uhligite =3.29 gm/cc.

Fermion Index:

Fermion Index = 0.05
Boson Index = 0.95

Photoelectric:

PE_Uhligite= 27.29 barns/electron
U=PE_Uhligite x rElectron Density= 85.83 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Uhligite is Not Radioactive

Uhligite Classification

Dana Class:

08.07.02.01 (08)Multiple Oxides with Nb, Ta, and Ti

(08.07)Dana Type

(08.07.02)Dana Group

08.07.02.01 Uhligite? Ca3(Ti,Al,Zr)9O20 Unk Cubic

Strunz Class:

04.XX.00 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.X - Unclassified Strunz OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, telluri

04.XX -Oxide

04.XX.00 Ashanite? (Nb,Ta,U,Fe,Mn)4O8 Pcan 2/m 2/m 2/m

04.XX.00 Methane hydrate-I! 46(H2O)•2(S)•6(L) P m3n 4/m 3 2/m

04.XX.00 Clinobirnessite* Na4Mn14O27•9(H2O) Mono

04.XX.00 Chubutite* Pb7O6Cl2 Unk Ortho

04.XX.00 Kleberite* FeTi6O13•4(H2O)(?) P 6₃mcm ? 6mm

04.XX.00 Hongquiite* TiO F m3m 4/m 3 2/m

04.XX.00 Psilomelane? (Ba,H2O)2Mn5O10 A2/m 2/m

04.XX.00 Struverite? (Ti,Ta,Fe)O2 P 4/mnm 4/m 2/m 2/m

04.XX.00 Ungursaite* NaCa5(Ta,Nb)24O65(OH) P 6₃/m,P 6₃ Hex

04.XX.00 Uhligite? Ca3(Ti,Al,Zr)9O20 Unk Cubic

04.XX.00 Scheteligite? (Ca,Y,Sb,Mn)2(Ti,Ta,Nb,W)2O6(O,OH) Unk Ortho

04.XX.00 Allendeite! Sc4Zr3O12 R 3 3

04.XX.00 IMA2000-016! (Ti,Fe,Mg,Mn)1-xTi2O5 Pban 2/m 2/m 2/m

04.XX.00 Methane hydrate-II! 136(H2O)•16(S)•8(L) F d3m 4/m 3 2/m

04.XX.00 IMA2000-026! (Mn,Li)4(Ta,Sn)4(Ta,Nb)8O32 C 2/c 2/m

04.XX.00 Methane hydrate-H! 34(H2O)•3(S)•2(M)•1(L) P 6/mmm 6/m 2/m 2/m

Other Uhligite Information

References:

NAME( Ford32) PHYS. PROP.(Dana8)

See Also:

Links to other databases for Uhligite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Print or Cut-and-Paste your Uhligite Specimen Label here :

Uhligite

Ca3(Ti,Al,Zr)9O20
Dana No: 08.07.02.01 Strunz No: 04.XX.00
Locality:

Notes: