Lindbergite Mineral Data

General Lindbergite Information

Chemical Formula:

Mn(C2O4)•2(H2O)

Composition:

Molecular Weight = 185.59 gm

Sodium 0.12 % Na 0.17 % Na₂O

Manganese 32.86 % Mn 42.43 % MnO

Aluminum 0.15 % Al 0.27 % Al₂O₃

Hydrogen 2.34 % H 20.87 % H₂O

Carbon 12.56 % C 37.64 % C₂O₃

Oxygen 51.98 % O

______ ______

100.00 % 101.38 % = TOTAL OXIDE

Empirical Formula:

Mn²⁺_1.11Na_0.01Al_0.01(C₂O₄)_0.97•2.15(H₂O)

Environment:

Secondary mineral in a granitic pegmatite. Thought to be pseudomorphous after the tri-hydrate. Mn analogue of humboldtine (oxalate)

IMA Status:

Approved IMA 2004 (Dana # Added)

Locality:

Boca Rica mine, Galileit, Minas Gerais, Brazil Link to MinDat.org Location Data.

Name Origin:

Named for Marie Louise Lindburg-Smith (1918-), USGS scientist who described several new species from the mine.

Synonym:

IMA2003-029

Lindbergite Image

Images:

Lindbergite Rockbridgeite

Comments: Rare organic mineral - lindbergite (Mn dihydrate oxalate) in white patches on rockbridgeite matrix.
Location: Boca Rica mine, Sapucaia do Norte, Gilileia, Minas Gerais, Brazil. Scale: Spot size 1 mm.
© Tom Loomis / Dakota Matrix

Images:

Lindbergite

Comments: Secondary electron image of interlocked irregularly contoured platelets of lindbergite. (AmMin v 89, p 1088).
Location: Boca Rica mine, Sapucaia do Norte, Gilileia, Minas Gerais, Brazil. Scale: See Image.
© American Mineralogist

Lindbergite Crystallography

Axial Ratios:

a:b:c =2.1226:1:1.7697

Cell Dimensions:

a = 11.955, b = 5.632, c = 9.967, Z = 4; beta = 128.34° V = 526.36 Den(Calc)= 2.34

Crystal System:

Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/c

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

By Intensity(I/I_o): 4.813(1)(202), 4.704(0.84)(200), 2.998(0.58)(402),4.861(0.26)(111), 3.909(0.23)(002), 3.626(0.22)(111),

Physical Properties of Lindbergite

Cleavage:

{010} Perfect

Color:

White, Grayish white.

Density:

2.1

Diaphaneity:

Transparent

Fracture:

Friable - The crumbly disintegration of earthy materials or highly fractured minerals.

Habit:

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

Habit:

Pseudomorphous - Occurs in the form of another mineral.

Hardness:

2.5 - Finger Nail

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Lindbergite

Gladstone-Dale:

CI meas= -0.659 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.488 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2313,KPDmeas= 0.2578,KC= 0.1554
Ncalc = 1.33 - 1.36

Optical Data:

Biaxial (-), a=1.424, b=1.55, g=1.65, bire=0.2260, 2V(Calc)=76, 2V(Meas)=80. Dispersion r > v very weak.

Calculated Properties of Lindbergite

Electron Density:

Bulk Density (Electron Density)=2.32 gm/cc
note: Specific Gravity of Lindbergite =2.34 gm/cc.

Fermion Index:

Fermion Index = 0.0016340801
Boson Index = 0.9983659199

Photoelectric:

PE_Lindbergite= 8.37 barns/electron
U=PE_Lindbergite x rElectron Density= 19.46 barns/cc.

Radioactivity:

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

Lindbergite Classification

Dana Class:

50.01.03.03 (50)Salts of Organic Acids

(50.01)(Oxalates)

(50.01.03)Humboldtine Group

50.01.03.01 Humboldtine Fe(C2O4)•2(H2O) I2/a 2/m

50.01.03.02 Glushinskite Mg(C2O4)•2(H2O) C 2/c 2/m

50.01.03.03 Lindbergite! Mn(C2O4)•2(H2O) C 2/c 2/m

Strunz Class:

10.AB.05 10 - ORGANIC COMPOUNDS

10.A - Salts of Organic Acids

10.AB -Oxalates

10.AB.05 Humboldtine Fe(C2O4)•2(H2O) I2/a 2/m

10.AB.05 Lindbergite! Mn(C2O4)•2(H2O) C 2/c 2/m

Other Lindbergite Information

References:

NAME( AmMin, v 89, p 1087) PHYS. PROP.(AmMin, v 89, p 1087) OPTIC PROP.(AmMin, v 89, p 1087)

See Also:

Links to other databases for Lindbergite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

Search for Lindbergite using:

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

Visit our Advertisers for Lindbergite :

Ask about Lindbergite 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 Español

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

Lindbergite

Mn(C2O4)•2(H2O)
Dana No: 50.01.03.03 Strunz No: 10.AB.05
Locality:

Notes:

Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.