Orlymanite
A valid IMA mineral species
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About Orlymanite
Orlando H. Lyman
Formula:
Ca4Mn3Si8O20(OH)6 · 2H2O
Colour:
Dark brown
Lustre:
Vitreous
Hardness:
4 - 5
Specific Gravity:
2.7 - 2.8
Crystal System:
Hexagonal
Member of:
Name:
Named in honor of Orlando Hammond Lyman (19 November 1903, Hawaii, USA – 11 December 1986, Hilo, Hawaii, USA), the Lyman House Memorial Museum's founder. He built its mineral and gem collection of over 20 000 specimens. The new mineral was found as a specimen taken from his collection.
Unique Identifiers
Mindat ID:
3019
Long-form identifier:
mindat:1:1:3019:5
IMA Classification of Orlymanite
Approved
IMA Formula:
Ca4Mn2+3Si8O20(OH)6·2H2O
Approval year:
1988
First published:
1990
Classification of Orlymanite
9.EE.30
9 : SILICATES (Germanates)
E : Phyllosilicates
E : Single tetrahedral nets of 6-membered rings connected by octahedral nets or octahedral bands
9 : SILICATES (Germanates)
E : Phyllosilicates
E : Single tetrahedral nets of 6-membered rings connected by octahedral nets or octahedral bands
73.2.2b.2
73 : PHYLLOSILICATES Condensed Tetrahedral Sheets
2 : Condensed Tetrahedral Sheets with double and single layers
73 : PHYLLOSILICATES Condensed Tetrahedral Sheets
2 : Condensed Tetrahedral Sheets with double and single layers
14.18.20
14 : Silicates not Containing Aluminum
18 : Silicates of Mn and Na, K, Mg, Ca or Fe
14 : Silicates not Containing Aluminum
18 : Silicates of Mn and Na, K, Mg, Ca or Fe
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Orl | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
| Orl | Warr (2020) | Warr, L.N. (2020) Recommended abbreviations for the names of clay minerals and associated phases. Clay Minerals, 55, 261–264 doi:10.1180/clm.2020.30 |
Physical Properties of Orlymanite
Vitreous
Transparency:
Translucent
Colour:
Dark brown
Streak:
Light brown
Hardness:
4 - 5 on Mohs scale
Cleavage:
Perfect
on {0001}
on {0001}
Density:
2.7 - 2.8 g/cm3 (Measured) 2.93 g/cm3 (Calculated)
Optical Data of Orlymanite
Type:
Uniaxial (-)
Pleochroism:
Visible
Comments:
O = pale brown
E' = dark brown
E' = dark brown
Chemistry of Orlymanite
Mindat Formula:
Ca4Mn3Si8O20(OH)6 · 2H2O
Element Weights:
Common Impurities:
Al,Fe,Mg,Na
Crystallography of Orlymanite
Crystal System:
Hexagonal
Cell Parameters:
a = 9.60(2) Å, c = 35.92(10) Å
Ratio:
a:c = 1 : 3.742
Unit Cell V:
2,866.88 ų (Calculated from Unit Cell)
Z:
5
Morphology:
Fibrous crystals, botryoidal
Comment:
Point Group: 3 or 3:; Space Group: _P3 or P3
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.60 Å | (100) |
| 1.840 Å | (90) |
| 3.13 Å | (80b) |
| 7.15 Å | (70) |
| 4.18 Å | (70) |
| 2.545 Å | (40b) |
| 2.469 Å | (40b) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| High-? alteration and/or metamorphism | |
| 32 : Ba/Mn/Pb/Zn deposits, including metamorphic deposits |
Type Occurrence of Orlymanite
General Appearance of Type Material:
Dark brown, radiating, tightly packed rosettes that form spheres 2-3 mm in diameter, or more irregular aggregates resembling a botryoidal texture in cross section.
Place of Conservation of Type Material:
National Museum of Natural History (Smithsonian), Washington D.C., USA, catalogue NMNH 16636.
Geological Setting of Type Material:
Vein mineral in manganese ore.
Associated Minerals at Type Locality:
Synonyms of Orlymanite
Other Language Names for Orlymanite
Relationship of Orlymanite to other Species
Member of:
Other Members of Gyrolite Group:
| Cairncrossite | Sr2Ca7-xNa2x(Si4O10)4(OH)2(H2O)15-x | Tric. 1 : P1 |
| Gyrolite | NaCa16Si23AlO60(OH)8 · 14H2O | Tric. 1 : P1 |
| Tungusite | Ca4Fe2Si6O15(OH)6 | Tric. 1 : P1 |
Common Associates
Associations Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
| 9.EE. | Cairncrossite | Sr2Ca7-xNa2x(Si4O10)4(OH)2(H2O)15-x |
| 9.EE.05 | Bementite | Mn7Si6O15(OH)8 |
| 9.EE.07 | Innsbruckite | Mn33(Si2O5)14(OH)38 |
| 9.EE.10 | 'Brokenhillite' | Mn8Si6O15(OH)10 |
| 9.EE.10 | Mcgillite | (Mn,Fe)8Si6O15(OH)8Cl2 |
| 9.EE.10 | Friedelite | Mn2+8Si6O15(OH,Cl)10 |
| 9.EE.10 | Pyrosmalite-(Mn) | Mn2+8Si6O15(OH,Cl)10 |
| 9.EE.10 | Pyrosmalite-(Fe) | Fe2+8Si6O15(OH,Cl)10 |
| 9.EE.15 | Nelenite | Mn2+16As3+3Si12O36(OH)17 |
| 9.EE.15 | Schallerite | Mn2+16As3Si12O36(OH)17 |
| 9.EE.20 | Palygorskite | ◻Al2Mg2◻2Si8O20(OH)2(H2O)4 · 4H2O |
| 9.EE.20 | Yofortierite | Mn2+Mn2+2Mn2+2◻2Si8O20(OH)2(H2O)4 · 4H2O |
| 9.EE.20 | Windhoekite | Fe3+(Fe3+1.67◻0.33)Ca2◻2Si8O20(OH)2(H2O)4(OH)2 · 6H2O |
| 9.EE.20 | Windmountainite | ◻Fe3+2Mg2◻2Si8O20(OH)2(H2O)4 · 4H2O |
| 9.EE.20 | Ikorskyite | KMn3+(Si4O10) · 3H2O |
| 9.EE.20 | Tuperssuatsiaite | Fe3+Fe3+2(Na◻)◻2Si8O20(OH)2(H2O)4 · 2H2O |
| 9.EE.20 | 'Unnamed (Na-Ca-Fe-Silicate-Hydrate)' | NaCa(Fe2+,Al,Mn)5[Si8O19(OH)](OH)7 · 5H2O |
| 9.EE.25 | Sepiolite | Mg4(Si6O15)(OH)2 · 6H2O |
| 9.EE.25 | Loughlinite | Na2Mg3Si6O16 · 8H2O |
| 9.EE.25 | Falcondoite | (Ni,Mg)4Si6O15(OH)2 · 6H2O |
| 9.EE.25 | Kalifersite | (K,Na)5Fe3+7Si20O50(OH)6 · 12H2O |
| 9.EE.30 | Tungusite | Ca4Fe2Si6O15(OH)6 |
| 9.EE.30 | Gyrolite | NaCa16Si23AlO60(OH)8 · 14H2O |
| 9.EE.35 | Reyerite | (Na,K)2Ca14(Si,Al)24O58(OH)8 · 6H2O |
| 9.EE.35 | Kodamaite | Na3(Ca5Na)Si16O36(OH)4F2 · (14-x)H2O |
| 9.EE.35 | Truscottite | (Ca,Mn)14Si24O58(OH)8 · 2H2O |
| 9.EE.40 | Natrosilite | Na2Si2O5 |
| 9.EE.45 | Makatite | Na2Si4O8(OH)2 · 4H2O |
| 9.EE.50 | Varennesite | Na8Mn2Si10O25(OH,Cl)2 · 12H2O |
| 9.EE.55 | Raite | Mn2+Mn2+2Na2(◻1.75Ti0.25)Si8O20(OH)2(H2O)4 · Na(H2O)6 |
| 9.EE.60 | Intersilite | Na6Mn2+Ti[Si10O24(OH)](OH)3 · 4H2O |
| 9.EE.65 | Zakharovite | Na4Mn5Si10O24(OH)6 · 6H2O |
| 9.EE.65 | Shafranovskite | Na3K2(Mn,Fe,Na)4[Si9(O,OH)27](OH)2 · nH2O |
| 9.EE.70 | Zeophyllite | Ca13Si10O28(OH)2F8 · 6H2O |
| 9.EE.75 | Minehillite | (K,Na)2-3Ca28Zn4Al4Si40O112(OH)16 |
| 9.EE.80 | Fedorite | (Na,K)2-3(Ca4Na3)Si16O38(OH,F)2 · 3.5H2O |
| 9.EE.80 | Martinite | (Na,◻,Ca)12Ca4(Si,S,B)14B2O38(OH,Cl)2F2 · 4H2O |
| 9.EE.80 | Ellingsenite | Na5Ca6Si18O38(OH)13 · 6H2O |
| 9.EE.85 | Lalondeite | (Na,Ca)6(Ca,Na)3Si16O38(F,OH)2 · 3H2O |
Fluorescence of Orlymanite
None observed
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Orlymanite
mindat.org URL:
https://www.mindat.org/min-3019.html
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References for Orlymanite
Localities for Orlymanite
Showing 4 localities.
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The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
South Africa | |
| |
| Cairncross et al. (2013) | |
| Peacor et al. (1990) +1 other reference |
Ukraine | |
| Kasatkin (2019) |
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Wessels Mine, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa