Mannardite Mineral Data

General Mannardite Information

Chemical Formula:

BaTi6V+++2O16•(H2O)

Composition:

Molecular Weight = 800.50 gm

Barium 17.16 % Ba 19.15 % BaO

Titanium 35.89 % Ti 59.87 % TiO₂

Vanadium 12.73 % V 18.72 % V₂O₃

Hydrogen 0.25 % H 2.25 % H₂O

Oxygen 33.98 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

BaTi₆V³⁺₂O₁₆•(H₂O)

Environment:

In late-stage quartz-carbonate veins cutting shale and siltstone.

IMA Status:

Approved IMA 1986

Locality:

Rough Claims, Sifton Pass, Kechica River, British Columbia, Canada. Link to MinDat.org Location Data.

Name Origin:

Named for George William Mannard (1932-1982), formerly President of Kidd Creek Mines, Ltd., Toronto, Canada.

Name Pronunciation:

Mannardite + Pronunciation

Synonym:

ICSD 201926

IMA1983-013

PDF 42-615

Mannardite Image

Images:

Mannardite

Comments: Prismatic crystals of black, metallic lustered mannardite crystals in matrix.
Location: Kechica River, British Columbia, Canada. Scale: 3.4 X 4.5 cm.
© John Veevaert

Mannardite Crystallography

Axial Ratios:

a:c = 1:0.41174

Cell Dimensions:

a = 14.356, c = 5.911, Z = 4; V = 1,218.23 Den(Calc)= 4.36

Crystal System:

Tetragonal - DipyramidalH-M Symbol (4/m) Space Group: I 4₁/a

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.201(1), 1.586(0.8), 2.473(0.7),

Crystal Structure:

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Szymanski J T , The Canadian Mineralogist , 24 (1986) p.67-78, The crystal structure of mannardite, a new hydrated cryptomelane-group, (hollandite) mineral with a doubled short axis

Physical Properties of Mannardite

Cleavage:

{100} Good

Color:

Black.

Density:

4.12 - 4.43, Average = 4.27

Diaphaneity:

Opaque

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Hardness:

7 - Quartz

Luster:

Adamantine

Streak:

gray white

Optical Properties of Mannardite

Optical Data:

Uniaxial (+).

NCalc= 2.39 - from Gladstone-Dale relationship (KC = 0.3197) where Ncalc=Dcalc*KC+1
NCalc= 2.37 - from Gladstone-Dale relationship (KC = 0.3197) where Ncalc=Dmeas*KC+1

RL Anisotrophism:

Strong, light pinkish gray to dark brownish gray.

RL Bireflectance:

Distinct, light to dark brown.

RL Color:

Pale reddish brown.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Mannardite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	16.50	18.00
420 nm	16.30	17.60
440 nm	16.00	17.20
460 nm	15.70	17.00
480 nm	15.50	16.90
500 nm	15.40	17.00
520 nm	15.20	17.20
540 nm	15.10	17.40
560 nm	15.00	17.70
580 nm	15.00	17.90
600 nm	15.00	18.10
620 nm	15.00	18.30
640 nm	15.00	18.40
660 nm	15.00	18.50
680 nm	15.10	18.60
700 nm	15.10	18.60

**Calculated Relative Intensity Colors of Mannardite in Air**
Relative Intensity	0%	60%	100%	120%	180%	240%	300%	360%	420%	480%	540%	580%
R₁
R₂

Calculated Properties of Mannardite

Electron Density:

Bulk Density (Electron Density)=4.05 gm/cc
note: Specific Gravity of Mannardite =4.36 gm/cc.

Fermion Index:

Fermion Index = 0.07
Boson Index = 0.93

Photoelectric:

PE_Mannardite= 82.64 barns/electron
U=PE_Mannardite x rElectron Density= 334.87 barns/cc.

Radioactivity:

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

Mannardite Classification

Dana Class:

07.09.05.01 (07)Multiple Oxides

(07.09)Dana Type

(07.09.05)Dana Group

07.09.05.01 Mannardite BaTi6V2O16•(H2O) I 4₁/a 4/m

07.09.05.02 Redledgeite BaTi6Cr2O16•(H2O) I 4₁/a 4/m

Strunz Class:

04.DK.05 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.D - Metal:Oxygen = 1:2 and similar

04.DK -With large (± medium-sized) cations; tunnel structures

04.DK.05 Akaganeite Fe(O,OH,Cl) I2/m 2/m

04.DK.05 Ankangite Ba(Ti,V,Cr)8O16 I 4/m 4/m

04.DK.05 Coronadite Pb(Mn,Mn)8O16 I2/m 2/m

04.DK.05 Hollandite Ba(Mn,Mn)8O16 I2/m 2/m

04.DK.05 Manjiroite (Na,K)(Mn,Mn)8O16•n(H2O) I 4/m 4/m

04.DK.05 Mannardite BaTi6V2O16•(H2O) I 4₁/a 4/m

04.DK.05 Redledgeite BaTi6Cr2O16•(H2O) I 4₁/a 4/m

04.DK.05 Priderite (K,Ba)(Ti,Fe)8O16 I 4/m 4/m

04.DK.05 Henrymeyerite! BaFeTi7O16 I 4/m 4/m

Other Mannardite Information

References:

NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic3)

See Also:

Links to other databases for Mannardite :
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
15 - WWW-MINCRYST

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

Mannardite

BaTi6V+++2O16•(H2O)
Dana No: 07.09.05.01 Strunz No: 04.DK.05
Locality:

Notes: