Mineralogy Database

Lansfordite Mineral Data

Search Webmineral :
  
Advertisment

General Lansfordite Information

Help on Chemical  Formula: Chemical Formula: MgCO3•5(H2O)
Help on Composition: Composition: Molecular Weight = 174.39 gm
   Magnesium  13.94 %  Mg   23.11 % MgO
   Hydrogen    5.78 %  H    51.65 % H2O
   Carbon      6.89 %  C    25.24 % CO2
   Oxygen     73.40 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mg(CO3)•5(H2O)
Help on Environment: Environment: Stalactites pendant from the shale roof of an anthracite coal mine.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1888
Help on Locality: Locality: Nesquehoning, near Lansford, Carbon Co., Pennsylvania, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Lansfordite + Pronunciation Say LANSFORDITE
Help on Synonym: Synonym: ICSD 69476
  PDF 35-680
 

Lansfordite Image

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

  Lansfordite   Barringtonite

Comments: Optical images of clusters of glassy lansfordite crystals and one white dehydrated barringtonite ? crystal. (AmMin, 88:1883).
Location: Crystals associated with the remains of a saguaro, Carnegiea gigantea from south and west central Arizona. Scale: Scale bar 800 µ-m.
© American Mineralogist

Lansfordite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.6529:1:0.9721
Help on Cell Dimensions: Cell Dimensions: a = 12.48, b = 7.55, c = 7.34, Z = 4; beta = 101.767° V = 677.07 Den(Calc)= 1.71
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/a
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.85(1), 4.16(1), 5.8(0.8),
Help on Forms: Forms:

Mouse
Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize

Keyboard
S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu

Help on Above

Forms: ( 1 1 0) ( 1 1 1) ( 1 1 1) ( 0 1 1) ( 2 1 0) ( 1 0 0) ( 0 0 1)

Warning: this java applet does not work in some browsers because of security restrictions.

 

Physical Properties of Lansfordite

Help on Cleavage: Cleavage: {001} Perfect, {100} Distinct
Help on Color: Color: Colorless, White.
Help on Density: Density: 1.7
Help on Diaphaneity: Diaphaneity: Transparent to Opaque
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous - Dull
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: white
 

Optical Properties of Lansfordite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.026 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.02 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2807,KPDmeas= 0.2824,KC= 0.2751
Ncalc = 1.47
Help on Optical Data: Optical Data: Biaxial (+), a=1.465, b=1.468, g=1.507, bire=0.0420
 

Calculated Properties of Lansfordite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=1.80 gm/cc
note: Specific Gravity of Lansfordite =1.71 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PELansfordite = 0.57 barns/electron
U=PELansfordite x rElectron Density= 1.03 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Lansfordite is Not Radioactive
 

Lansfordite Classification

Help on  Dana Class: Dana Class: 15.01.06.01 (15)Hydrated Carbonates
  (15.01)where A+ (XO3) � x(H2O)
  (15.01.06)Dana Group
 
15.01.06.01 Lansfordite MgCO3•5(H2O) P 21/a 2/m
Help on  Strunz Class: Strunz Class: 05.CA.10 05 - CARBONATES (NITRATES)
  05.C - Carbonates without Additional Anions, with H2O
  05.CA -With medium-sized cations
 
05.CA.10 Lansfordite MgCO3•5(H2O) P 21/a 2/m
 

Other Lansfordite Information

Help on References: References: NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Lansfordite :
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

Search for Lansfordite using:

Google
 
Web webmineral.com
[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Lansfordite :

Ask about Lansfordite 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 Lansfordite Specimen Label here :

Lansfordite

MgCO3•5(H2O)
Dana No: 15.01.06.01 Strunz No: 05.CA.10
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.