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Ribbeite

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Formula:
(Mn2+,Mg)5(SiO4)2(OH)2
System:
Orthorhombic
Colour:
Pink
Hardness:
5
Name:
For US mineralogist Paul Hubert Ribbe (b. 1935)
This page provides mineralogical data about Ribbeite.

Classification of Ribbeite

Approved 1985
9.AF.65

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

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
14.17.5

14 : Silicates not Containing Aluminum
17 : Silicates of Mn
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Type Occurrence of Ribbeite

Year of Discovery:
1985

Physical Properties of Ribbeite

Vitreous
Diaphaneity (Transparency):
Transparent
Colour:
Pink
Hardness (Mohs):
5

Crystallography of Ribbeite

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

Optical Data of Ribbeite

Type:
Biaxial (+)
RI values:
nα = 1.780 nβ = 1.792 nγ = 1.808
2V:
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
Dispersion:
r > v distinct

Chemical Properties of Ribbeite

Formula:
(Mn2+,Mg)5(SiO4)2(OH)2
Essential elements:
All elements listed in formula:
Common Impurities:
Fe,Ca,H2O

Relationship of Ribbeite to other Species

Other Members of Group:
JerrygibbsiteMn92+(SiO4)4(OH)2
LeucophoeniciteMn72+(SiO4)3(OH)2
9.AF.05SillimaniteAl2(SiO4)O
9.AF.10AndalusiteAl2(SiO4)O
9.AF.10KanonaiteMn3+Al(SiO4)O
9.AF.15KyaniteAl2(SiO4)O
9.AF.20MulliteAl4+2xSi2-2xO10-x
9.AF.20Krieselite(Al,Ga)2(GeO4)(OH)2
9.AF.23BoromulliteAl9BSi2O19
9.AF.25YoderiteMg(Al,Fe3+)3(SiO4)2O(OH)
9.AF.30MagnesiostauroliteMg(Mg,Li)3(Al,Mg)18Si8O44(OH)4
9.AF.30StauroliteFe22+Al9Si4O23(OH)
9.AF.30ZincostauroliteZn2Al9Si4O23(OH)
9.AF.35TopazAl2(SiO4)(F,OH)2
9.AF.40NorbergiteMg3(SiO4)(F,OH)2
9.AF.45AlleghanyiteMn52+(SiO4)2(OH)2
9.AF.45Chondrodite(Mg,Fe2+)5(SiO4)2(F,OH)2
9.AF.45ReinhardbraunsiteCa5(SiO4)2(OH,F)2
9.AF.45KumtyubeiteCa5(SiO4)2F2
9.AF.45HydroxylchondroditeMg5(SiO4)2(OH)2
9.AF.50Humite(Mg,Fe2+)7(SiO4)3(F,OH)2
9.AF.50Manganhumite(Mn2+,Mg)7(SiO4)3(OH)2
9.AF.50Unnamed (Ca-analogue of Humite)Ca7(SiO4)4F2
9.AF.55ClinohumiteMg9(SiO4)4F2
9.AF.55SonoliteMn92+(SiO4)4(OH,F)2
9.AF.55HydroxylclinohumiteMg9(SiO4)4(OH)2
9.AF.60LeucophoeniciteMn72+(SiO4)3(OH)2
9.AF.70JerrygibbsiteMn92+(SiO4)4(OH)2
9.AF.75FranciscaniteMn62+(V5+,☐)2(SiO4)2(O,OH)6
9.AF.75ÖrebroiteMn32+(Sb5+,Fe3+)(SiO4)(O,OH)3
9.AF.75WeliniteMn62+(W6+,Mg)2(SiO4)2(O,OH)6
9.AF.80EllenbergeriteMg6(Mg,Ti,Zr,◻)2(Al,Mg)6Si8O28(OH)10
9.AF.85Chloritoid(Fe2+,Mg,Mn2+)Al2(SiO4)O(OH)2
9.AF.85MagnesiochloritoidMgAl2(SiO4)O(OH)2
9.AF.85Ottrélite(Mn2+,Fe2+,Mg)Al2(SiO4)O(OH)2
9.AF.90PoldervaartiteCaCa[SiO3(OH)](OH)
9.AF.90OlmiiteCaMn2+[SiO3(OH)](OH)
14.17.1RhodoniteMnSiO3
14.17.2TephroiteMn22+SiO4
14.17.3BrauniteMn2+Mn63+(SiO4)O8
14.17.4AlleghanyiteMn52+(SiO4)2(OH)2
14.17.6LeucophoeniciteMn72+(SiO4)3(OH)2
14.17.7JerrygibbsiteMn92+(SiO4)4(OH)2
14.17.8BementiteMn7Si6O15(OH)8
14.17.9Parsettensite(K,Na,Ca)7.5(Mn,Mg)49Si72O168(OH)50 · nH2O
14.17.10YofortieriteMn5Si8O20(OH)2 · 8-9H2O

Other Names for Ribbeite

Name in Other Languages:
German:Ribbeit
Spanish:Ribbeita

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.

References for Ribbeite

Reference List:
American Mineralogist (1987): 72: 213-216.

American Mineralogist (1993): 78: 190-194.

Internet Links for Ribbeite

Localities for Ribbeite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Japan
 
  • 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.
Romania
 
  • Maramureș Co.
http://minerals-of-the-carpathians.eu
Russia
 
  • Urals Region
    • Southern Urals
      • Bashkortostan Republic (Bashkiria Republic)
        • Sibay
Brusnitsyn, A.I. (2006): Geology of Ore Deposits 48(3), 193-214.
Switzerland
 
  • Wallis (Valais)
    • Turtmann Valley
      • Pipjitälli
The Canadian Mineralogist Vol. 44, pp. 000 (2006) page 205
Mineral and/or Locality  
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