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Kellyite

A valid IMA mineral species
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Mn2+2Al(AlSiO5)(OH)4
Colour:
Yellow
Hardness:
2½
Specific Gravity:
3.07
Crystal System:
Hexagonal
Member of:
Serpentine Subgroup >Kaolinite-Serpentine Group
Name:
Named in honor of William Crowley Kelly (b. 1929), Professor in the Department of Geology and Mineralogy, University of Michigan, Ann Arbor, Michigan, USA, and administrator, for his contributions to the study of worldwide ore deposits.
Type Locality:
ⓘBald Knob deposit, Bald Knob, Sparta, Alleghany County, North Carolina, USA
This page provides mineralogical data about Kellyite.


Unique Identifiers
IMA Formula:
(Mn2+,Mg,Al)3(Si,Al)2O5(OH)4
First published:
1974

Classification of Kellyite

9 : SILICATES (Germanates)
E : Phyllosilicates
D : Phyllosilicates with kaolinite layers composed of tetrahedral and octahedral nets
Dana 8th ed.:
71.1.2c.5

71 : PHYLLOSILICATES Sheets of Six-Membered Rings
1 : Sheets of 6-membered rings with 1:1 layers
Hey's CIM Ref.:
16.16.6

16 : Silicates Containing Aluminum and other Metals
16 : Aluminosilicates of Mn

Mineral Symbols
Surface Relief:
Moderate
Optical Extinction:
X ⊥ (001).
Comments:
X = colorless to greenish yellow; Y = Z = pale yellow
to reddish brown.

Chemistry of Kellyite
Common Impurities:
Ti,Fe,H2O

Crystallography of Kellyite
General Appearance of Type Material:
Transparent, yellow, 1 mm sized grains dispersed within manganese carbonates. Irregular-to-platy yellow tablets and laths.
Place of Conservation of Type Material:
National Museum of Natural History, Washington, D.C., USA, numbers 127101 and 137140/1 (cotype/type).
University of Michigan, Ann Arbor, USA, (cotype).
Geological Setting of Type Material:
Banded Ca-Mn carbonates.
Associated Minerals at Type Locality:
AlleghanyiteGalaxiteJacobsiteKutnohoriteSonolite

Synonyms of Kellyite

Other Language Names for Kellyite

Relationship of Kellyite to other Species
Other Members of Serpentine Subgroup:
AmesiteMg2Al(AlSiO5)(OH)4Tric. 1 :P1
AntigoriteMg3(Si2O5)(OH)4Mon.m :Bm
Berthierine(Fe2+,Fe3+,Al)3(Si,Al)2O5(OH)4Mon.m :Bm
Brindleyite(Ni,Al)3(Si,Al)2O5(OH)4Mon.
CaryopiliteMn2+3Si2O5(OH)4Mon.
ChrysotileMg3(Si2O5)(OH)4Mon.m :Bb
CronstedtiteFe2+2Fe3+((Si,Fe3+)2O5)(OH)4Trig. 3m :P31m
Fraipontite(Zn,Al)3((Si,Al)2O5)(OH)4Mon.
GuidottiiteMn2Fe3+(Fe3+SiO5)(OH)4Hex. 6 :P63
LizarditeMg3(Si2O5)(OH)4Trig. 3m :P31m
NépouiteNi3Si2O5(OH)4Orth.
PecoraiteNi3(Si2O5)(OH)4Mon.

Common AssociatesMon. 2/m9.ED.05DickiteAl2(Si2O5)(OH)4Mon.m :Bb9.ED.05NacriteAl2(Si2O5)(OH)4Mon.m :Bb9.ED.05KaoliniteAl2(Si2O5)(OH)4Tric. 1 :P19.ED.05Odinite(Fe,Mg,Al,Fe,Ti,Mn)2.4((Si,Al)2O5)(OH)4Mon.m :Bm9.ED.10HalloysiteAl2(Si2O5)(OH)4Mon.m :Bb9.ED.10HisingeriteFe3+2(Si2O5)(OH)4 · 2H2OMon.9.ED.10HydrohalloysiteAl2Si2O5(OH)4 · 2H2OMon.m9.ED.15AntigoriteMg3(Si2O5)(OH)4Mon.m :Bm9.ED.15Brindleyite(Ni,Al)3(Si,Al)2O5(OH)4Mon.9.ED.15Fraipontite(Zn,Al)3((Si,Al)2O5)(OH)4Mon.9.ED.15NépouiteNi3Si2O5(OH)4Orth.9.ED.15PecoraiteNi3(Si2O5)(OH)4Mon.9.ED.15GuidottiiteMn2Fe3+(Fe3+SiO5)(OH)4Hex. 6 :P639.ED.15LizarditeMg3(Si2O5)(OH)4Trig. 3m :P31m9.ED.15Berthierine(Fe2+,Fe3+,Al)3(Si,Al)2O5(OH)4Mon.m :Bm9.ED.15CronstedtiteFe2+2Fe3+((Si,Fe3+)2O5)(OH)4Trig. 3m :P31m9.ED.15CaryopiliteMn2+3Si2O5(OH)4Mon.9.ED.15 vaChromoamesiteMg2(Al,Cr)(AlSiO5)(OH)49.ED.15AmesiteMg2Al(AlSiO5)(OH)4Tric. 1 :P19.ED.15Greenalite(Fe2+,Fe3+)2-3Si2O5(OH)4Mon.9.ED.15ManandoniteLi2Al4(Si2AlB)O10(OH)8Orth. 222 :C22219.ED.20ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1Orth.9.ED.20Neotocite(Mn,Fe)SiO3 · H2O (?)Amor.9.ED.20Allophane(Al2O3)(SiO2)1.3-2 · 2.5-3H2OAmor.9.ED.20ImogoliteAl2SiO3(OH)49.ED.25BismutoferriteFe3+2Bi(SiO4)2(OH)Mon.m :Bm9.ED.25ChapmaniteFe3+2Sb3+(Si2O5)O3(OH)Mon.m :Bm9.ED.30PianliniteAl2Si2O6(OH)2Orth.

Other Information
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    • External Links:
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  • Raman and XRD data at RRUFF project
  • References and PDF downloads at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Handbook of Mineralogy page PDF
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    • References for KellyiteⓘKirchdachspitzeKolitsch et al. (2021)Kolitsch et al. (2019)
    Canada
     
    Richardson (1988)+1 other referenceHORVÁTH et al. (2000)
    China
     
    Yuchun Yang (1990)
    France
     
    Chopin (1978)Chopin (1978)
    Japan
     
    Matsubara & Kato (1986)Yamada (2004)K. Nishikubo et al. (2005)+1 other reference
    Romania
     
    Hîrtopanu et al. (2003)+1 other referencePaulina HIRTOPANU & Gheorghe UDUBASA (2015)+1 other referenceHîrtopanu (1997)+1 other reference
    Russia
     
    webmineral.ru (2020)Brusnitsyn (2000)Brusnitsyn A.I. (2000)
    UK
     
    Cotterell (2013)
    USA (TL)
     
    Rocks & Min.: 60:130-135.+1 other reference
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