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About RibbeiteHide

Paul Ribbe
Mn may be replaced by minor Mg.
Vitreous, Sub-Vitreous
Specific Gravity:
Crystal System:
Named in 1987 by Donald R. Peacor, Pete J. Dunn, S. C. Su, and J. Innes in honor of Paul Hubert Ribbe [2 April 1935 Bristol, Connecticut, USA - 24 June 2017 Virginia, USA], professor of mineralogy at Virginia Polytechnic Institute and State University, Blacksburg, Virginia, USA and investigator of crystal structures, particularly those of the feldspar group. The publication of the new species commented: "We have named this new species ribbeite in honor of Dr. Paul H. Ribbe in recognition of his many contributions to mineralogy, both to the science through his research, and to the society of mineralogists, in part through his editorship of the Reviews in Mineralogy series of the Mineralogical Society of America. It is particularly appropriate that ribbeite is closely related to the humite group, to which he has made major contributions."
Dimorph of:
This page provides mineralogical data about Ribbeite.

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

Vitreous, Sub-Vitreous
None Observed
3.90 g/cm3 (Measured)    3.84 g/cm3 (Calculated)

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
X, Y colorless; Z light pink
Z > X - Y; X = b, Y = a, Z = c

Chemical Properties of RibbeiteHide


Mn may be replaced by minor Mg.
Common Impurities:

Crystallography of RibbeiteHide

Crystal System:
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Cell Parameters:
a = 4.799 Å, b = 10.742 Å, c = 15.70 Å
a:b:c = 0.447 : 1 : 1.462
Unit Cell V:
809.35 ų (Calculated from Unit Cell)
Space group either Pbnm or Pbn21

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0001545RibbeiteFreed R L, Rouse R C, Peacor D R (1993) Ribbeite, a second example of edge-sharing silicate tetrahedra in the leucophoenicite group American Mineralogist 78 190-19419930293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
5.08 Å(5)
4.41 Å(30)
4.23 Å(2)
3.93 Å(1)
3.83 Å(30)
3.53 Å(5)
3.49 Å(5)
3.362 Å(10)
3.256 Å(5)
2.925 Å(70)
2.873 Å(80)
2.821 Å(70)
2.695 Å(60)
2.552 Å(80)
2.515 Å(40)
2.398 Å(2)
2.356 Å(40)
2.315 Å(5)
2.246 Å(10)
2.216 Å(2)
2.117 Å(5)
1.996 Å(1)
1.834 Å(1)
1.796 Å(100)
Peacor, Donald R., Dunn, Pete J., Su, Shu-Chun, and Innes, John (1987) Ribbeite, a Polymorph of Alleghanyite and Member of the Leucophoenicite Group from the Kombat Mine, Namibia, The American Mineralogist, v. 72, p. 213-216.

Type Occurrence of RibbeiteHide

Geological Setting of Type Material:
Ribbeite occurs as pinkish lenses up to 5 cm thick and20 cm long within a 20-m-wide zone of tectonically in-tercalated manganese and iron ores. Locally within the stope environs, the complexly deformed manganese andiron ores assume the attitude of a vertically plunging cy-lindroidal fold in which ribbeite has a preferential asso-ciation with carbonate-silicate facies within the man-ganese ores. The lenses are derived by tectonictransposition and boudinaging of the original sedimen-tary protore layering. The area containing ribbeite mea-sured only ca. 40 cm across as exposed on the stope back.Ribbeite can be regarded as a scarce mineral. The trans-posed layering is transgressed by an abundance ofveinletsof a proposed new manganese hydroxy-carbonate thatclearly postdate the major tectonism but are themselvesslightly deformed. Of interest also is the occurrence ofmanganosite as a constituent (to 5olo by volume) of somehausmannite-pyrochroite-barite-calcite layers within theMn ores but not immediately associated with the rib-beite-alleghanyite layers. The manganosite is altering topyrochroite and hausmannite and occurs as ragged em-erald-green relicts up to 2 cm in diameter. The texturalevidence strongly suggests that manganosite was a syngenetic precursor of the hausmannite ores.
Associated Minerals at Type Locality:

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.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.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. 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

14.17.1RhodoniteCaMn3Mn[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
14.17.6LeucophoeniciteMn2+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

Fluorescence of RibbeiteHide

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 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.
  • Ehime Prefecture
    • Ouzu City
      • Nagahama
Minakawa et al (1991) Ganseki-Koubutsu-Koshogaku Zasshi, 86, 182.
  • Gifu Prefecture
    • Mino City
Masutomi Museum specimen (Kyoto)
  • Nagano Prefecture
    • Kamiina District
      • Hamayokokawa mine (Hamayokogawa mine)
Akira Kato (2011) Explanations of distributed specimens at the Ordinary Meeting of Mumeikai Group, No. 34 (January, 20011).
  • 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.)
  • 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)
Namibia (TL)
  • Otjozondjupa Region
    • Grootfontein
      • Kombat
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.; Dunn, P.J., Francis, C.A., Innes, J. (1988) A mcgovernite-like mineral and leucophoenicite from the Kombat mine, Namibia. American Mineralogist: 73(9-10): 1182-1185.; Dunn, P.J. (1991) Rare minerals of the Kombat Mine. Mineralogical Record: 22(6): 421-425.
Hirtopanu, P. (2006). One hundred minerals for one hundred years (dedicated to the Centennial of the Geological Institute of Romania). In 3rd Conference on Mineral Sciences in the Carpathians, Miskolc Hungary. Acta Mineralogica–Petrographica, Abstract series (Vol. 5, p. 86).
  • Maramureș
    • Târgu Lăpuș
  • Suceava
    • Suceava district
      • Iacobeni
        • Tolovanu
Udubașa, G., Ďud'a, R., Szakáll, S., Kvasnytsya, V., Koszowska, E., Novák, M. (2002): Minerals of the Carpathians (Szakáll, S., ed.). Granit, Prague, Czech Rep., 482 pp. Hîrtopanu, P. (1997): Tolovanu manganese mine. In: Nedelcu, L., Moga, C., Podasca, I., Hirtopanu, P. (Eds.), Crystalline zone of the East Carpathians (Northern Bistrița Mts.): Structure, lithostratigraphy, metamorphism and metallogeny. Valea Putnei-Valea Bistriței. Romanian Journal of Mineralogy: 78 (Suppl. 2): 25-34
  • Bashkortostan
    • 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.
  • Komi Republic
Brusnitsyn, A. I.; Kalugin, P. S. (2012): Kellyite in manganese-bearing rocks of the Parnokskoye deposit (Polar Urals). Zapiski Rossiiskogo Mineralogicheskogo Obshchestva 141, 83-90 (in Russian).
  • Valais
    • Leuk
      • Turtmann-Unterems
        • Turtmann Valley
          • Pipjitälli
The Canadian Mineralogist Vol. 44, pp. 000 (2006) page 205
  • New Jersey
    • Sussex County
      • Franklin Mining District
        • Franklin
Heixhong Yang
矿物 and/or 产地  
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