Lipscombite Mineral Data

Lipscombite Mineral Data +

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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 % Fe₂O₃

Phosphorus 15.83 % P 36.28 % P₂O₅

Hydrogen 0.52 % H 4.60 % H₂O

Oxygen 40.89 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Fe²⁺_0.75Mn²⁺_0.25Fe³⁺₂(PO₄)₂(OH)₂

IMA Status:

Valid Species (Pre-IMA) 1953

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 202937

PDF 45-1454

Lipscombite Image

Images:

Lipscombite

Comments: Light to dark green botryoidal lipscombite crust on rock.
Location: Valmy, Humboldt County, Nevada, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

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 - TrapezohedralH-M Symbol (4 2 2) Space Group: P 4₁2₁2

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

By Intensity(I/I_o): 3.314(1), 3.206(0.6), 1.656(0.4),

Crystal Structure:

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Vencato I , Mattievich E , Mascarenhas Y P , American Mineralogist , 74 (1989) p.456-460, Crystal structure of synthetic lipscombite: A redetermination

Physical Properties of Lipscombite

Color:

Green gray, Olive green, Black.

Density:

3.66

Diaphaniety:

Opaque

Calculated Properties of Lipscombite

Electron Density:

r_electron=3.57 gm/cc
note: r_Lipscombite=3.68 gm/cc.

Fermion Index

Fermion Index = 0.00851
Boson Index = 0.99149

Photoelectric:

PE_Lipscombite= 13.45 barns/electron
U=PE_Lipscombite x r_electron= 48.00 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Lipscombite is Not Radioactive

Lipscombite Classification

Dana Class:

41.10.2.1 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen

(41.10)where (A++ B++)3 (XO4)2 Zq

(41.10.2)Dana Group

41.10.2.1 Lipscombite (Fe,Mn)Fe2(PO4)2(OH)2 P 4₁2₁2 4 2 2

Strunz Class:

VII/B.08-60 VII - Phosphates, Arsenates and Vanadates

VII/B - Waterfree phosphates with unfamiliar anions F, Cl, O,OH, cations of medium size: Mg, Mn, Fe, Cu, Zn, Pseudomalachite group and related compounds

VII/B.08 - Lazulite group, Trolleite - Richellite

VII/B.08-10 Trolleite Al4(PO4)3(OH)3 I2/c 2/m

VII/B.08-20 Lazulite MgAl2(PO4)2(OH)2 P 2₁/c 2/m

VII/B.08-30 Scorzalite (Fe,Mg)Al2(PO4)2(OH)2 P 2/c 2/m

VII/B.08-40 Barbosalite FeFe2(PO4)2(OH)2 P 2₁/c 2/m

VII/B.08-50 Hentschelite CuFe2(PO4)2(OH)2 P 2₁/n 2/m

VII/B.08-55 Wilhelmkleinite! ZnFe3(AsO4)2(OH)2 P 2₁/n 2/m

VII/B.08-60 Lipscombite (Fe,Mn)Fe2(PO4)2(OH)2 P 4₁2₁2 4 2 2

VII/B.08-70 Richellite Ca3Fe10(PO4)8(OH)12·n(H2O) P 4 4

Other Lipscombite Information

References:

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

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

Lipscombite

(Fe++,Mn)Fe+++2(PO4)2(OH)2
Dana No: 41.10.2.1 Strunz No: VII/B.08-60
Locality:

Notes: