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Orlymanite Mineral Data

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General Orlymanite Information

Help on Chemical  Formula: Chemical Formula: Ca4Mn++3Si8O20(OH)6•2(H2O)
Help on Composition: Composition: Molecular Weight = 1,007.87 gm
   Calcium    15.91 %  Ca   22.26 % CaO
   Manganese  16.35 %  Mn   21.12 % MnO
   Silicon    22.29 %  Si   47.69 % SiO2
   Hydrogen    1.00 %  H     8.94 % H2O
   Oxygen     44.45 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca4Mn2+3Si8O20(OH)6•2(H2O)
Help on Environment: Environment: Part of a vein assemblage. One specimen known.
Help on IMA Status: IMA Status: Approved IMA 1990
Help on Locality: Locality: Wessels mine, Kalahari manganese field, Cape Province, South Africa. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Orlando P. Lyman (1903-1986), founder of Lyman House Memorial Museum, Hilo, Hawaii.
Help on Name Pronunciation: Name Pronunciation: Orlymanite + Pronunciation Say ORLYMANITE
Help on Synonym: Synonym: IMA1988-029

Orlymanite Image

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Comments: Brown crystalline orlymanite with radiating structure, on inesite.
Location: N'Chwaning Mine, Kuruman, Northern Cape Province, South Africa. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Orlymanite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:3.74166
Help on Cell Dimensions: Cell Dimensions: a = 9.6, c = 35.92, Z = 5; V = 2,866.88 Den(Calc)= 2.92
Help on Crystal System: Crystal System: Trigonal Space Group: P 3-,P 3
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.6(1), 1.84(0.9), 3.13(0.8),

Physical Properties of Orlymanite

Help on Cleavage: Cleavage: {0001} Perfect
Help on Color: Color: Dark brown.
Help on Density: Density: 2.7 - 2.8, Average = 2.75
Help on Diaphaneity: Diaphaneity: Translucent
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Habit: Habit: Rosette - Bundled tabular aggregates resembling rose flower petals.
Help on Hardness: Hardness: 4-5 - Fluorite-Apatite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: light brown

Optical Properties of Orlymanite

Help on Dichroism (e): Dichroism (e): dark brown.
Help on Dichroism (w): Dichroism (w): pale brown.
Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.002 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.06 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2048,KPDmeas= 0.2175,KC= 0.2179
Ncalc = 1.59 - 1.64
Help on Optical Data: Optical Data: Uniaxial (-), w=1.598.

Calculated Properties of Orlymanite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.73 gm/cc
note: Specific Gravity of Orlymanite =2.75 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEOrlymanite = 6.91 barns/electron
U=PEOrlymanite x rElectron Density= 18.89 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Orlymanite is Not Radioactive

Orlymanite Classification

Help on  Dana Class: Dana Class: 73.02.02b.02 (73)Phyllosilicate Condensed Tetrahedral Sheets
  (73.02)with double and single layers
  (73.02.02b)Reyerite group (Minehillite Subgroup)
73.02.02b.01 Minehillite (K,Na)2-3Ca28(Zn4Al4Si40)O112(OH)16 P 63/mmm, P 62c, or P 63mc Hex
73.02.02b.02 Orlymanite Ca4Mn3Si8O20(OH)6•2(H2O) P 3-,P 3 Trig
Help on  Strunz Class: Strunz Class: 09.EJ.15 09 - SILICATES (Germanates)
  09.E - Phyllosilicates
  09.EJ -Unclassified phyllosilicates
09.EJ.15 Orlymanite Ca4Mn3Si8O20(OH)6•2(H2O) P 3-,P 3 Trig

Other Orlymanite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Orlymanite :
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

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Dana No: 73.02.02b.02 Strunz No: 09.EJ.15





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