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Jerrygibbsite

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About JerrygibbsiteHide

08252540015332164826519.jpg
Gerald V. Gibbs
Formula:
Mn2+9(SiO4)4(OH)2
Colour:
Violet pink to pinkish violet
Lustre:
Sub-Vitreous, Resinous
Hardness:
Specific Gravity:
4.00
Crystal System:
Orthorhombic
Name:
Named by Pete J. Dunn, Donald R. Peacor, William B. Simmons, and Eric J. Essene in 1984 in honor of Gerald "Jerry" V. Gibbs (28 June 1928. Hannover, New Hampshire, USA - ) mineralogist and professor at Virginia Polytechnic Institute, Blacksburg, Virginia, USA. He was awarded the Roebling Medal for 1987.
Light to medium pinkish violet massive mineral with franklinite, willemite, and zincite. Not found with any calcite at the type location. Physically resembles leucophoenicite, sonolite, and other members of its group. It is not possible to sight identify this species. Each specimen requires verification. Numerous fakes are known. At the type locality, the mineral was found in very few specimens. X-ray diffraction may be used to identify the species in conjunction with a chemical analysis. Caution: jerrygibbsite shares many of the same d lines as other humites, but the calculated cell dimensions are based on a super-cell relationship.


Classification of JerrygibbsiteHide

Approved
Approval Year:
1981
8/B.04-100
9.AF.70

9 : SILICATES (Germanates)
A : Nesosilicates
F : Nesosilicates with additional anions; cations in [4], [5] and/or only [6] coordination
52.3.2d.2

52 : NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
3 : Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] coordination only
14.17.7

14 : Silicates not Containing Aluminum
17 : Silicates of Mn

Physical Properties of JerrygibbsiteHide

Sub-Vitreous, Resinous
Transparency:
Translucent
Comment:
Said to be vitreous on cleavage surfaces, but usually dull resinous.
Colour:
Violet pink to pinkish violet
Comment:
Not rosey pink as in leucophoenicite
Streak:
Pale pink
Hardness:
5½ on Mohs scale
Tenacity:
Brittle
Cleavage:
Imperfect/Fair
Parallel to {001}
Fracture:
Irregular/Uneven
Comment:
Cleavage is not obvious
Density:
4.00 g/cm3 (Measured)    4.07 g/cm3 (Calculated)

Optical Data of JerrygibbsiteHide

Type:
Biaxial (-)
RI values:
nα = 1.772 nβ = 1.783 nγ = 1.789
2V:
Measured: 72° , Calculated: 72°
Birefringence:
0.027
Max Birefringence:
δ = 0.017
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
r > v moderate
Optical Extinction:
Parallel. abc = XYZ
Pleochroism:
Non-pleochroic

Chemical Properties of JerrygibbsiteHide

Formula:
Mn2+9(SiO4)4(OH)2
Common Impurities:
Fe,Zn,Mg,Ca,H2O

Crystallography of JerrygibbsiteHide

Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Pbcn
Cell Parameters:
a = 28.17 Å, b = 4.85 Å, c = 10.70 Å
Ratio:
a:b:c = 5.808 : 1 : 2.206
Unit Cell V:
1,461.88 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Massive.
Comment:
Setting is P21cn

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0014840JerrygibbsiteKato T, Ito Y, Hashimoto N (1989) The crystal structures of sonolite and jerrygibbsite Neues Jahrbuch fur Mineralogie, Monatshefte 1989 410-4301989Franklin, New Jersey0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
5.25 Å(9)
4.40 Å(11)
4.25 Å(9)
3.74 Å(24)
3.56 Å(5)
3.48 Å(29)
3.21 Å(14)
2.869 Å(78)
2.813 Å(9)
2.752 Å(49)
2.702 Å(46)
2.661 Å(34)
2.631 Å(3)
2.557 Å(100)
2.416 Å(16)
2.377 Å(11)
2.362 Å(39)
2.342 Å(28)
2.225 Å(4)
2.118 Å(5)
1.806 Å(100)
1.730 Å(18)
1.692 Å(11)
1.661 Å(9)
1.567 Å(26)
1.550 Å(34)
1.458 Å(18)
Comments:
American Mineralogist (1984): 69: 546-552.

Geological EnvironmentHide

Geological Setting:
Manganese silicate deposit where it was originally found as an indistinguishable mixture of several humite group species.

Type Occurrence of JerrygibbsiteHide

General Appearance of Type Material:
Massive to granular-appearing light to medium pink violet mineral.
Place of Conservation of Type Material:
Smithsonian Institution
Geological Setting of Type Material:
Metamorphosed manganese-bearing zinc silicate and zinc oxide ore deposit.
Associated Minerals at Type Locality:

Synonyms of JerrygibbsiteHide

Other Language Names for JerrygibbsiteHide

Relationship of Jerrygibbsite to other SpeciesHide

Other Members of this group:
LeucophoeniciteMn2+7(SiO4)3(OH)2Mon. 2/m : P21/b
RibbeiteMn2+5(SiO4)2(OH)2Orth.

Common AssociatesHide

LeucophoeniciteMn2+7(SiO4)3(OH)2
SonoliteMn2+9(SiO4)4(OH)2
Associated Minerals Based on Photo Data:
2 photos of Jerrygibbsite associated with FrankliniteZn2+Fe3+2O4
2 photos of Jerrygibbsite associated with ZinciteZnO
1 photo of Jerrygibbsite associated with WillemiteZn2SiO4

Related Minerals - Nickel-Strunz GroupingHide

9.AF.ChegemiteCa7(SiO4)3(OH)2Orth. mmm (2/m 2/m 2/m)
9.AF.BarwooditeMn2+6Nb5+(SiO4)2O3(OH)3Trig. 3 : P3
9.AF.05SillimaniteAl2(SiO4)OOrth. mmm (2/m 2/m 2/m)
9.AF.10AndalusiteAl2(SiO4)OOrth. mmm (2/m 2/m 2/m) : Pnnm
9.AF.10KanonaiteMn3+Al(SiO4)OOrth. mmm (2/m 2/m 2/m) : Pnnm
9.AF.15KyaniteAl2(SiO4)OTric. 1 : P1
9.AF.20MulliteAl4+2xSi2-2xO10-xOrth. mmm (2/m 2/m 2/m) : Pbam
9.AF.20Krieselite(Al,Ga)2(GeO4)(OH)2Orth. mmm (2/m 2/m 2/m) : Pnma
9.AF.23BoromulliteAl9BSi2O19Orth. mm2 : Cmc21
9.AF.25YoderiteMg(Al,Fe3+)3(SiO4)2O(OH)Mon. 2/m : P21/m
9.AF.30MagnesiostauroliteMg(Mg,Li)3(Al,Mg)18Si8O44(OH)4Mon. 2/m : B2/m
9.AF.30StauroliteFe2+2Al9Si4O23(OH)Mon. 2/m : B2/m
9.AF.30ZincostauroliteZn2Al9Si4O23(OH)Mon. 2/m : B2/m
9.AF.35TopazAl2(SiO4)(F,OH)2Orth. mmm (2/m 2/m 2/m)
9.AF.40NorbergiteMg3(SiO4)(F,OH)2Orth. mmm (2/m 2/m 2/m)
9.AF.45AlleghanyiteMn2+5(SiO4)2(OH)2Mon. 2/m : P21/b
9.AF.45Chondrodite(Mg,Fe2+)5(SiO4)2(F,OH)2Mon. 2/m : P21/b
9.AF.45ReinhardbraunsiteCa5(SiO4)2(OH,F)2Mon. 2/m : P21/b
9.AF.45KumtyubeiteCa5(SiO4)2F2Mon. 2/m : P21/b
9.AF.45HydroxylchondroditeMg5(SiO4)2(OH)2Mon. 2/m : P21/b
9.AF.50Humite(Mg,Fe2+)7(SiO4)3(F,OH)2Orth. mmm (2/m 2/m 2/m) : Pnma
9.AF.50Manganhumite(Mn2+,Mg)7(SiO4)3(OH)2Orth.
9.AF.50Unnamed (Ca-analogue of Humite)Ca7(SiO4)4F2Orth. mmm (2/m 2/m 2/m)
9.AF.55ClinohumiteMg9(SiO4)4F2Mon. 2/m : P21/b
9.AF.55SonoliteMn2+9(SiO4)4(OH)2Mon.
9.AF.55HydroxylclinohumiteMg9(SiO4)4(OH)2Mon. 2/m
9.AF.60LeucophoeniciteMn2+7(SiO4)3(OH)2Mon. 2/m : P21/b
9.AF.65RibbeiteMn2+5(SiO4)2(OH)2Orth.
9.AF.75FranciscaniteMn2+6(V5+,☐)2(SiO4)2(O,OH)6Hex.
9.AF.75ÖrebroiteMn2+3(Sb5+,Fe3+)(SiO4)(O,OH)3Hex.
9.AF.75WeliniteMn2+6(W6+,Mg)2(SiO4)2(O,OH)6Trig. 3 : P3
9.AF.80EllenbergeriteMg6(Mg,Ti,Zr,◻)2(Al,Mg)6Si8O28(OH)10Hex.
9.AF.85Chloritoid(Fe2+,Mg,Mn2+)Al2(SiO4)O(OH)2Mon. 2/m : B2/b
9.AF.85MagnesiochloritoidMgAl2(SiO4)O(OH)2Mon. 2/m : B2/b
9.AF.85Ottrélite(Mn2+,Fe2+,Mg)Al2(SiO4)O(OH)2Mon.
9.AF.90PoldervaartiteCaCa[SiO3(OH)](OH)Orth. mmm (2/m 2/m 2/m) : Pbca
9.AF.90OlmiiteCaMn2+[SiO3(OH)](OH)Orth. mmm (2/m 2/m 2/m) : Pbca

Related Minerals - Dana Grouping (8th Ed.)Hide

52.3.2d.1ClinohumiteMg9(SiO4)4F2Mon. 2/m : P21/b
52.3.2d.3SonoliteMn2+9(SiO4)4(OH)2Mon.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

14.17.1RhodoniteCaMn3Mn[Si5O15]Tric. 1
14.17.2TephroiteMn2+2SiO4Orth. mmm (2/m 2/m 2/m)
14.17.3BrauniteMn2+Mn3+6(SiO4)O8Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
14.17.4AlleghanyiteMn2+5(SiO4)2(OH)2Mon. 2/m : P21/b
14.17.5RibbeiteMn2+5(SiO4)2(OH)2Orth.
14.17.6LeucophoeniciteMn2+7(SiO4)3(OH)2Mon. 2/m : P21/b
14.17.8BementiteMn7Si6O15(OH)8Mon.
14.17.9Parsettensite(K,Na,Ca)7.5(Mn,Mg)49Si72O168(OH)50 · nH2OMon. 2/m : B2/m
14.17.10YofortieriteMn5Si8O20(OH)2 · 8-9H2OMon. 2/m : B2/m

Fluorescence of JerrygibbsiteHide

Not fluorescent in UV.

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for JerrygibbsiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Dunn, P.J., Peacor, D.R., Simmons, W.B., Essene, E.J. (1984) Jerrygibbsite, a new polymorph of Mn9(SiO4)4(OH)2 from Franklin, New Jersey, with new data on leucophoenicite. American Mineralogist: 69: 546-552.
Kato, T., Ito, Y., Hashimoto, N. (1989) The crystal structures of sonolite and jerrygibbsite. Neues Jahrbuch für Mineralogie, Monatshefte: 410-430.

Internet Links for JerrygibbsiteHide

Localities for JerrygibbsiteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Namibia
 
  • Otjozondjupa Region
    • Grootfontein
      • Kombat
Donald R. Peacor, Pete J. Dunn, Shu-Chun Su and John Innes(1987): Ribbeite, a polymorph of alleghanyite and member of the leucophoenicite group from the Kombat mine, Namibia. American Mineralogist, Volume 72, pages 213-216
Romania
 
  • Maramureș
http://minerals-of-the-carpathians.eu; Udubasa, G., Hartopanu, P., Ilinca, G. (1996). The Regionally metamorphosed Fe-Mn Ore Deposit at Razoare, Preluca Mts., Romania. Romanian Journal of Mineralogy, 77, 3-20.
USA (TL)
 
  • New Jersey
    • Sussex County
      • Franklin Mining District
        • Franklin
Dunn, P.J., et al: Am.Min.:69:546-552 (1984); Dunn, P.J.: Am.Min.:70:379-387 (1985); Dunn(1995):Pt3:356.
 
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