Lipscombite Mineral Data
General Lipscombite Information
Chemical Formula:
(Fe++,Mn)Fe+++2(PO4)2(OH)2
Composition:
Molecular Weight = 391.27 gm
Manganese 3.51 % Mn 4.53 % MnO
Iron 39.25 % Fe 13.77 % FeO / 40.81 % Fe2 O3
Phosphorus 15.83 % P 36.28 % P2 O5
Hydrogen 0.52 % H 4.60 % H2 O
Oxygen 40.89 % O
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:
Fe2+ 0.75 Mn2+ 0.25 Fe3+ 2 (PO4 )2 (OH)2
Environment:
Hydrothermally altered phosphate zone of a complex granite pegmatite.
IMA Status:
Valid Species (Pre-IMA) 1953
Locality:
Sapucaia pegmatite mine, about 50 km east-southeast of Governador Valadares, Minas Gerais, Brazil Link to MinDat.org Location Data.
Name Origin:
Named for William Nunn Lipscomb (1909- ), mineralogist, University of Minnesota, Minneapolis, Minnesota, USA, who determined the crystal structure of the synthetic compound.
Name Pronunciation:
Lipscombite + Pronunciation
Synonym:
ICSD 202937
PDF 45-1454
Lipscombite Image
Images:
Lipscombite Crystallography
Axial Ratios:
a:c = 1:1.80738
Cell Dimensions:
a = 7.31, c = 13.212, Z = 4; V = 706.00 Den(Calc)= 3.68
Crystal System:
Tetragonal - Trapezohedral H-M Symbol (4 2 2) Space Group: P 41 21 2
X Ray Diffraction:
By Intensity(I/Io ): 3.314(1), 3.206(0.6), 1.656(0.4),
Physical Properties of Lipscombite
Color:
Green gray, Olive green, Black.
Density:
3.66
Diaphaneity:
Opaque
Optical Properties of Lipscombite
Optical Data:
NCalc= 1.9 - from Gladstone-Dale relationship (KC = 0.2454) where Ncalc =Dcalc *KC +1 NCalc= 1.9 - from Gladstone-Dale relationship (KC = 0.2454) where Ncalc =Dmeas *KC +1
Calculated Properties of Lipscombite
Electron Density:
Bulk Density (Electron Density)=3.57 gm/cc note: Specific Gravity of Lipscombite =3.68 gm/cc.
Fermion Index:
Fermion Index = 0.0085183369 Boson Index = 0.9914816631
Photoelectric:
PELipscombite = 13.45 barns/electronU=PELipscombite x r Electron Density= 48.00 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Lipscombite is Not Radioactive
Lipscombite Classification
Dana Class:
41.10.02.01 (41) Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
(41.10) where (A++ B++)3 (XO4)2 Zq
(41.10.02) Lipscombite Group
41.10.02.01 Lipscombite (Fe,Mn)Fe2(PO4)2(OH)2 P 41 21 2 4 2 2
41.10.02.02 Zinclipscombite ! ZnFe2(PO4)2(OH) P 43 21 2 or P 41 21 2 4 2 2
Strunz Class:
08.BB.90 08 - PHOSPHATES, ARSENATES, VANADATES
08.B - Phosphates, etc. with Additional Anions, without H2O
08.BB -With only medium-sized cations, (OH, etc.):RO4 � 1:1
08.BB.90 Lipscombite (Fe,Mn)Fe2(PO4)2(OH)2 P 41 21 2 4 2 2
08.BB.90 Richellite Ca3Fe10(PO4)8(OH)12•n(H2O) P 4 4
08.BB.90 Zinclipscombite ! ZnFe2(PO4)2(OH) P 43 21 2 or P 41 21 2 4 2 2
Other Lipscombite Information
References:
NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990)
See Also:
Links to other databases for Lipscombite :
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
Search for Lipscombite using:
[AOL ]
[Bing ]
[Dog Pile ]
[GeoScienceWorld ]
[HotBot ]
[Ixquick ]
[Lycos ]
[MAMMA ]
[Scirus ]
[Teoma ]
[WebCrawler ]
[Wikipedia ]
[YAHOO ]
Visit our Advertisers for Lipscombite :
Ask about Lipscombite 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 Lipscombite Specimen Label here :
Lipscombite
(Fe++,Mn)Fe+++2(PO4)2(OH)2
Dana No: 41.10.02.01 Strunz No: 08.BB.90
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.