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Ottrélite

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Formula:
(Mn2+,Fe2+,Mg)Al2(SiO4)O(OH)2
Hardness:
6 - 7
Mn analogue of Chloritoid.

Classification of Ottrélite

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
9.AF.85

9 : SILICATES (Germanates)
A : Nesosilicates
F : Nesosilicates with additional anions; cations in [4], [5] and/or only [6] coordination
52.3.3.3

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
16.16.21

16 : Silicates Containing Aluminum and other Metals
16 : Aluminosilicates of Mn
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Type Occurrence of Ottrélite

Year of Discovery:
1809

Physical Properties of Ottrélite

Hardness (Mohs):
6 - 7

Optical Data of Ottrélite

Type:
Biaxial (+)
RI values:
nα = 1.709 - 1.725 nβ = 1.712 - 1.726 nγ = 1.716 - 1.732
2V:
Measured: 46° to 70°, Calculated: 46° to 82°
Max Birefringence:
δ = 0.007
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
r > v strong

Chemical Properties of Ottrélite

Formula:
(Mn2+,Fe2+,Mg)Al2(SiO4)O(OH)2
Essential elements:
All elements listed in formula:
Common Impurities:
Ca,H2O

Relationship of Ottrélite to other Species

Other Members of Group:
CarboiriteFeAl2(GeO4)O(OH)2
Chloritoid(Fe2+,Mg,Mn2+)Al2(SiO4)O(OH)2
MagnesiochloritoidMgAl2(SiO4)O(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.30Magnesiostaurolite(Mg,Li,Fe2+)1.5-2Al9(SiO4)4O6(OH)2
9.AF.30Staurolite(Fe2+,Mg,Zn)1.5-2Al9(SiO4)4O6(OH,O)2
9.AF.30Zincostaurolite(Zn,Li,Fe2+,Mg)1.5-2Al9(SiO4)4O6(OH)2
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.65Ribbeite(Mn2+,Mg)5(SiO4)2(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.90PoldervaartiteCaCa[SiO3(OH)](OH)
9.AF.90OlmiiteCaMn2+[SiO3(OH)](OH)
16.16.1KanonaiteMn3+Al(SiO4)O
16.16.2SpessartineMn32+Al2(SiO4)3
16.16.3DavreuxiteMnAl6Si4O17(OH)2
16.16.4SursassiteMn22+Al3(Si2O7)(SiO4)(OH)3
16.16.5CarpholiteMn2+Al2(Si2O6)(OH)4
16.16.6KellyiteMn22+Al(AlSiO5)(OH)4
16.16.7PennantiteMn52+Al(AlSi3O10)(OH)8
16.16.8Akatoreite(Mn2+,Fe2+)9Al2(HSi4O13)2(OH)6
16.16.9Ganophyllite(K,Na,Ca)2Mn8(Si,Al)12(O,OH)32 · 8H2O
16.16.10Mangano-ferri-eckermannite[Na][Na2][Mn42+(Fe3+)]Si8O22(OH)2
16.16.11Masutomilite(K,Rb)(Li,Mn3+,Al)3(AlSi3O10)(F,OH)2
16.16.13HowieiteNa(Fe,Mn)10(Fe,Al)2Si12O31(OH)13
16.16.14Eggletonite(Na,K,Ca)2(Mn,Fe)8(Si,Al)12O29(OH)7 · 11H2O
16.16.15BannisteriteCa0.5(K,Na)0.5(Mn,Fe,Zn)10(Si,Al)16O38(OH)8 · 5.5H2O
16.16.16Taneyamalite(Na,Ca)(Mn,Mg,Fe)12Si12(O,OH)44
16.16.17ZussmaniteK(Fe,Mg,Mn)13(Si,Al)18O42(OH)14
16.16.18CoombsiteK(Mn,Fe,Mg)13(Si,Al)18O42(OH)14
16.16.19HenritermieriteCa3(Mn3+,Al)2(SiO4)2(OH)4
16.16.20MacfalliteCa2(Mn3+,Al)3(Si2O7)(SiO4)(OH)3
16.16.22Piemontite{Ca2}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
16.16.23OkhotskiteCa2(Mn2+,Mg)(Mn3+,Al,Fe3+)2(Si2O7)(SiO4)(OH)2 · H2O
16.16.24Pumpellyite-(Mn2+)Ca2(Mn2+,Mg)(Al,Mn3+,Fe3+)2(Si2O7)(SiO4)(OH)2 · H2O
16.16.25Piemontite-(Sr){CaSr}{Al2Mn3+}(Si2O7)(SiO4)O(OH)

Other Names for Ottrélite

Name in Other Languages:
Simplified Chinese:粒硬绿泥石

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 Ottrélite

Reference List:
Descloizeux & Damour (1842): De l'ottrelite. Nouvelle espèce minérale. Annales des Mines. 4eme Series, II, 357-361

Mineralogical Abstracts: 30: 285.

Bulletin de la Société française de Minéralogie et de Cristallographie (1978): 101: 548-557.

Internet Links for Ottrélite

Localities for Ottrélite

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.
Belgium
 
  • Liège Province
    • Stavelot Massif
      • Lienne valley
        • Stoumont
  • Luxembourg Province
    • Bastogne
    • Stavelot Massif
Michel Bloindieau
Hatert, F., Deliens, M., Fransolet, A.-M. & van der Meersche, E. (2002): Les minéraux de Belgique. 2ème édition, Muséum des Sciences Naturelles, Bruxelles, Ed., 304 p.
        • Cahai (Cahay)
Frank de Wit collection
Descloizeux & Damour (1842): De l'Ottrelite. Nouvelle espèce minérale. Annales des Mines. 4eme Serie, Tome II, 357-361
Canada
 
  • Québec
    • Abitibi-Témiscamingue
      • Abitibi-Ouest RCM
        • Normetal
Sabina, A.P. (2003): Rocks & Minerals for the collector; Kirkland Lake - Rouyn-Noranda - Val d'Or, Ontario & Quebec. GSC Misc. Report 77, 92p.
      • Rouyn-Noranda TE
Sabina (2003) 66.
    • Chaudière-Appalaches
      • Les Appalaches RCM
Harvard Museum of Natural History
France
 
  • Languedoc-Roussillon
    • Gard
      • Trèves
        • Mas Aubert
R.C. Maury and P. Picot : "Conditions d'Apparition du Fer Natif dans une Enclave de Schistes Graphiteux d'une Basanite des Cévennes", Bulletin de Minéralogie, 1979, Vol. 102, N° 4, 326-332
Germany
 
  • Bavaria
    • Upper Palatinate
      • Lam
Geotopkataster database, Bayerisches Landesamt für Umwelt
  • Saxony-Anhalt
    • Harz
Lapis 15(7/8), 59-60 (1990)
Italy
 
  • Piedmont
    • Torino Province
      • Susa Valley
        • Bussoleno
          • Tignai
Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007): MInerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.
  • Tuscany
    • Massa-Carrara Province
      • Apuan Alps
        • Massa
Mexico
 
  • Michoacan
    • Mun. de Coalcomám
Ref.: Revista Mexicana de Ciencias Geológicas, volumen 17, número 2, p.143-153 (2000)
Sweden
 
  • Dalarna
    • Smedjebacken
GFF 20, 50
  • Skåne
    • Bromölla
      • Näsum
Sandstöm, F. (2007): Västanåfeltets geologi och mineralogi. Litiofilen 24 (2): 14-38
    • Kristianstad
      • Vånga
Swedish Nat.Musuem ( O.Gabrielson)
  • Värmland
    • Munkfors
      • Ransäter
No reference listed
USA
 
  • California
    • Inyo Co.
      • Panamint Mts (Panamint Range)
        • South Park District
Murphy, Franklin Mac (1932), Geology of a part of the Panamint Range, California Calif. Min Bureau Report 28: 347; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 137; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 436.
    • Siskiyou Co.
      • Yreka
Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 137.
  • Maryland
    • Frederick Co.
      • Libertytown
Dana 6:1071.
  • Massachusetts
    • Worcester Co.
      • Sterling
Emerson, 1917. Geology of Mass. & Rhode Island, p.61
  • New Mexico
    • Sierra Co.
Minerals of New Mexico 3rd ed.
  • North Carolina
      • Marble
Wilson,W.F and McKenzie, B.J.,1978, Mineral Collecting Sites in North Carolina,Information Circular 24
    • Moore Co.
      • Glendon District
Rocks & Min.: 60: 92.
      • Robbins District
        • Cabin Creek
Rocks & Min.: 60:92.
    • Randolph Co.
Wilson,W.F and McKenZie,B.J,1978,Mineral Collecting Sites in North Carolina, Information Circular 24
      • Staley
Rocks & Min.:60:93.
  • Rhode Island
    • Newport Co.
AmMin 12:427-436 (1927)
Fisher, L.W. and Doll, C.G. (1927) Notes on the mineral localities of Rhode Island. American Mineralogist, 12, 427-436
Miller, 1971. RI Minerals & Their Locations
AmMin 12:427-436
    • Providence Co.
      • Cranston
        • Arlington
      • Providence
Museum of Natural History, Roger Williams Park, Providence, R.I. G4196 6395
  • South Carolina
    • Cherokee Co.
      • Kings Mountain District
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
  • South Dakota
    • Lawrence Co.
SDSMT Bull 18 Roberts and Rapp "Mineralogy of the Black Hills"
  • Virginia
    • Bedford Co.
Minerals of Virginia 1990 by R. V. Dietrich
Mineral and/or Locality  
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