Hollandite Mineral Data (original) (raw)

General Hollandite Information

Help on Chemical Formula: Chemical Formula:

Ba(Mn++++,Mn++)8O16

Help on Composition: Composition:

Molecular Weight = 852.99 gm

Barium 12.88 % Ba 14.38 % BaO

Sodium 0.27 % Na 0.36 % Na2O

Manganese 42.51 % Mn 4.16 % MnO / 62.17 % MnO2

Aluminum 0.63 % Al 1.20 % Al2O3

Iron 8.51 % Fe 12.17 % Fe2O3

Silicon 0.33 % Si 0.70 % SiO2

Lead 4.86 % Pb 5.23 % PbO

Oxygen 30.01 % O

______ ______

100.00 % 100.38 % = TOTAL OXIDE

Help on Empirical Formula: Empirical Formula:

Ba0.8Pb0.2Na0.1Mn4+6.1Fe3+1.3Mn2+0.5Al0.2Si0.1O16

Help on Environment: Environment:

Primary mineral in contact metamorphism of manganese ores.

Help on IMA Status: IMA Status:

Valid Species (Pre-IMA) 1906

Help on Locality: Locality:

Manganese deposits of the Central Provinces of India. Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

Named for Thomas Henry Holland (1868-1947), Director of the Indian Geologic Survey.

Help on Name Pronunciation: Name Pronunciation:

Hollandite + Pronunciation Say HOLLANDITE

Help on Synonym: Synonym:

ICSD 27240

PDF 38-476

Hollandite Image

Click Here for Larger Hollandite Image in a New Browser Window Images:

Click Here for Larger Hollandite Image Hollandite Comments: Gray, feathery aggregates of hollandite. Location: Sieben Brüder Mine, Langenberg, Schwarzenberg District, Erzgebirge, Saxony, Germany.Scale: Picture size 5 mm. © Thomas Witzke / Abraxas-Verlag

Hollandite Crystallography

Help on Axial Ratios: Axial Ratios:

a:b:c =3.4836:1:3.3804

Help on Cell Dimensions: Cell Dimensions:

a = 10.026, b = 2.878, c = 9.729, Z = 1; beta = 91.03° V = 280.68 Den(Calc)= 5.05

Help on Crystal System: Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: I2/m

Help on X Ray Diffraction: X Ray Diffraction:

By Intensity(I/Io): 3.143(1), 3.101(0.98), 2.412(0.73),

Click Here for Large Hollandite Structure Window Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

| | Zhang J , Ko J , Hazen R M , Prewitt C T , American Mineralogist , 78 (1993) p.493-499, High-pressure crystal chemistry of KAlSi3O8 hollandite, Pressure = 0.00 GPa View Additional jPOWD Structure files for Hollandite [1] [2] [3] [4] [5] [6] [7] | | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |

Physical Properties of Hollandite

Help on Cleavage: Cleavage:

{???} Good

Help on Color: Color:

Grayish black, Black, Silver gray.

Help on Density: Density:

4.7 - 5, Average = 4.84

Help on Diaphaneity: Diaphaneity:

Opaque

Help on Fracture: Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Help on Habit: Habit:

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

Help on Habit: Habit:

Striated - Parallel lines on crystal surface or cleavage face.

Help on Hardness: Hardness:

4-6

Help on Luminescence: Luminescence:

Non-fluorescent.

Help on Luster: Luster:

Earthy (Dull)

Help on Streak: Streak:

black

Optical Properties of Hollandite

Help on Optical Data: Optical Data:

Biaxial (?)

NCalc= 2.62 - from Gladstone-Dale relationship (KC = 0.3215) where Ncalc=Dcalc*KC+1
NCalc= 2.56 - from Gladstone-Dale relationship (KC = 0.3215) where Ncalc=Dmeas*KC+1

Help on RL Anisotrophism: RL Anisotrophism:

Strong.

Help on RL Color: RL Color:

White.

Help on RL Pleochroism: RL Pleochroism:

Weak.

Help on Reflectivity Reflectivity

Standardized Intensity (100%) Reflection Spectra of Hollandite in Air

λ R1 R 2 ∑ R1(λ) ∑ R2(λ)
400 nm 31.30 37.70
420 nm 31.20 37.40
440 nm 31.10 37.10
460 nm 30.50 36.50
480 nm 29.70 35.90
500 nm 29.10 35.00
520 nm 28.50 34.20
540 nm 27.80 33.10
560 nm 27.10 32.20
580 nm 26.60 31.50
600 nm 26.30 30.90
620 nm 26.10 30.40
640 nm 25.80 30.00
660 nm 25.60 29.50
680 nm 25.30 29.00
700 nm 25.00 28.30

Calculated Relative Intensity Colors of Hollandite in Air

RelativeIntensity 0% 40% 80% 100% 120% 160% 200% 240% 280% 320% 330%
R1
R2

Calculated Properties of Hollandite

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=4.65 gm/cc
note: Specific Gravity of Hollandite =5.05 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.03
Boson Index = 0.97

Help on Photoelectric: Photoelectric:

PEHollandite = 151.07 barns/electron
U=PEHollandite x rElectron Density= 703.17 barns/cc.

Help on Radioactivity: Radioactivity:

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

Hollandite Classification

Help on Dana Class: Dana Class:

07.09.01.01 (07)Multiple Oxides

(07.09)Dana Type

(07.09.01)Cryptomelane Group (Hard black, fine-grained)

07.09.01.01 Hollandite Ba(Mn,Mn)8O16 I2/m 2/m

07.09.01.02 Cryptomelane K(Mn,Mn)8O16 I2/m 2/m

07.09.01.03 Manjiroite (Na,K)(Mn,Mn)8O16•n(H2O) I 4/m 4/m

07.09.01.04 Coronadite Pb(Mn,Mn)8O16 I2/m 2/m

07.09.01.05 Strontiomelane! SrMn6Mn2O16 P 21/m 2/m

07.09.01.06 Henrymeyerite! BaFeTi7O16 I 4/m 4/m

Help on Strunz Class: 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 Hollandite Information

Help on References: References:

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

Help on See Also: See Also:

Links to other databases for Hollandite :
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 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info
14 - Scandinavian mineral gallery
15 - WWW-MINCRYST

Search for Hollandite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Hollandite :

A Bijoux Google Search for Hollandite
Adam's Minerals Google Search for Hollandite
Cape Minerals Google Search for Hollandite
Dakota Matrix Minerals Google Search for Hollandite
Excalibur Mineral Corp. Google Search for Hollandite
Exceptional Minerals Google Search for Hollandite
John Betts Fine Minerals Search for Hollandite
McDougall Minerals Google Search for Hollandite
Mineral News Website Link
Rock and Mineral Shows Google Search for Hollandite
Weinrich Minerals, Inc. Google Search for Hollandite

Ask about Hollandite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Espa�ol

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

Hollandite

Ba(Mn++++,Mn++)8O16
Dana No: 07.09.01.01 Strunz No: 04.DK.05
Locality:

Notes: