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Paul Ribbe
Crystal System:
Named in 1987 by Donald R. Peacor, Pete J. Dunn, S. C. Su, and J. Innes in honor of Paul Hubert Ribbe (1935 - June 2017), professor of mineralogy at Virginia Polytechnic Institute and State University, Blacksburg, Virginia, USA and investigator of crystal structures.
This page provides mineralogical data about Ribbeite.

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Classification of RibbeiteHide

Approval Year:

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

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 : Silicates not Containing Aluminum
17 : Silicates of Mn

Physical Properties of RibbeiteHide


Optical Data of RibbeiteHide

Biaxial (+)
RI values:
nα = 1.780 nβ = 1.792 nγ = 1.808
Measured: 83° , Calculated: 84°
Max Birefringence:
δ = 0.028
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
r > v distinct

Chemical Properties of RibbeiteHide

IMA Formula:
Common Impurities:

Crystallography of RibbeiteHide

Crystal System:
Cell Parameters:
a = 4.79 Å, b = 10.74 Å, c = 15.7 Å
a:b:c = 0.446 : 1 : 1.462
Unit Cell V:
807.68 ų (Calculated from Unit Cell)

Type Occurrence of RibbeiteHide

Synonyms of RibbeiteHide

Other Language Names for RibbeiteHide


Relationship of Ribbeite to other SpeciesHide

Other Members of this group:
JerrygibbsiteMn2+9(SiO4)4(OH)2Orth. mmm (2/m 2/m 2/m) : Pbcn
LeucophoeniciteMn2+7(SiO4)3(OH)2Mon. 2/m : P21/b

Related Minerals - Nickel-Strunz GroupingHide

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)
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.55HydroxylclinohumiteMg9(SiO4)4(OH)2Mon. 2/m
9.AF.60LeucophoeniciteMn2+7(SiO4)3(OH)2Mon. 2/m : P21/b
9.AF.70JerrygibbsiteMn2+9(SiO4)4(OH)2Orth. mmm (2/m 2/m 2/m) : Pbcn
9.AF.75WeliniteMn2+6(W6+,Mg)2(SiO4)2(O,OH)6Trig. 3 : P3
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.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

52.3.2b.1AlleghanyiteMn2+5(SiO4)2(OH)2Mon. 2/m : P21/b
52.3.2b.2Chondrodite(Mg,Fe2+)5(SiO4)2(F,OH)2Mon. 2/m : P21/b
52.3.2b.3ReinhardbraunsiteCa5(SiO4)2(OH,F)2Mon. 2/m : P21/b

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

14.17.1RhodoniteMn2+SiO3Tric. 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
14.17.6LeucophoeniciteMn2+7(SiO4)3(OH)2Mon. 2/m : P21/b
14.17.7JerrygibbsiteMn2+9(SiO4)4(OH)2Orth. mmm (2/m 2/m 2/m) : Pbcn
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

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 RibbeiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Peacor, D.R., Dunn, P.J., Su, S.-C., Innes, J. (1987): Ribbeite, a polymorph of alleghanyite and member of the leucophoenicite group from the Kombat mine, Namibia. American Mineralogist 72, 213-216.
Freed, R.L., Rouse, R.C., Peacor, D.R. (1993) Ribbeite, a second example of edge-sharing silicate tetrahedra in the leucophoenicite group. American Mineralogist 78, 190-194.
Brusnitsyn, A. I., Chukanov, N. V. (2002): Ribbeite and alleghanyite from the Yuzhno-Faisulinskoe manganese ore deposit (southern Urals). Zapiski Vserossiiskogo Mineralogicheskogo Obshchestva 131, 98-111 (in Russian).

Internet Links for RibbeiteHide

Localities for RibbeiteHide

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.
  • Honshu Island
    • Chubu Region
      • Gifu Prefecture
        • Mino City
Masutomi Museum specimen (Kyoto)
      • Nagano Prefecture
        • Kami-Ina-gun
          • Hamayokokawa mine (Hamayokogawa mine)
Akira Kato (2011) Explanations of distributed specimens at the Ordinary Meeting of Mumeikai Group, No. 34 (January, 20011).
    • Kanto Region
      • Tochigi Prefecture
        • Kanuma City
Kato & Matsubara (1994) Mineralogical Journal, 17, 77-82.; Akira Kato (undated manuscript): Country rock and Minerals of the Kaso mine, Kanuma City, Tochigi Prefecture. (in japanese)
    • Kinki Region
      • Shiga Prefecture
        • Takashima City
Masutomi Museum specimen (Kyoto)
Yamada, S. (2004) Nihonsan-koubutsu Gojuon-hairetsu Sanchi-ichiranhyou (111 pp.)
Yamada, S. (2004) Nihonsan-koubutsu Gojuon-hairetsu Sanchi-ichiranhyou (111 pp.)
  • Shikoku Island
    • Ehime Prefecture
      • Ouzu City
        • Nagahama
Minakawa et al (1991) Ganseki-Koubutsu-Koshogaku Zasshi, 86, 182.
Namibia (TL)
  • Otjozondjupa Region
    • Grootfontein District
      • Kombat
Dunn, P.J. (1991), Rare minerals of the Kombat Mine, Mineralogical Record: 22(6): 421-425.
  • Maramureș Co.
  • Urals Region
    • Southern Urals
      • Bashkortostan Republic (Bashkiria Republic)
        • Sibay
Brusnitsyn, A. I., Chukanov, N. V. (2002): Ribbeite and alleghanyite from the Yuzhno-Faisulinskoe manganese ore deposit (southern Urals). Zapiski Vserossiiskogo Mineralogicheskogo Obshchestva 131, 98-111 (in Russian).; Brusnitsyn, A.I. (2006): Geology of Ore Deposits 48(3), 193-214.
  • Wallis (Valais)
    • Turtmann Valley
      • Pipjitälli
The Canadian Mineralogist Vol. 44, pp. 000 (2006) page 205
  • New Jersey
    • Sussex Co.
      • Franklin Mining District
        • Franklin
Heixhong Yang
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