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Ottrélite

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Chloritoid

Ottré, Vielsalm, Stavelot Massif, Luxembourg Province, Belgium
Ottrélite

Ottré, Vielsalm, Stavelot Massif, Luxembourg Province, Belgium
Ottrélite

Ottré, Vielsalm, Stavelot Massif, Luxembourg Province, Belgium
Chloritoid

Ottré, Vielsalm, Stavelot Massif, Luxembourg Province, Belgium
Ottrélite

Ottré, Vielsalm, Stavelot Massif, Luxembourg Province, Belgium
Ottrélite

Ottré, Vielsalm, Stavelot Massif, Luxembourg Province, Belgium
Chloritoid

Ottré, Vielsalm, Stavelot Massif, Luxembourg Province, Belgium
Ottrélite

Ottré, Vielsalm, Stavelot Massif, Luxembourg Province, Belgium
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About OttréliteHide

The quarry in 2014

Pagani quarry, Ottré, Vielsalm, Stavelot Massif, Luxembourg Province, Belgium
Formula:
(Mn2+,Fe2+,Mg)Al2(SiO4)O(OH)2
Colour:
Pistachio-green, greenish to dark grey
Hardness:
6 - 7
Crystal System:
Monoclinic
Name:
Named by A. Descloizeaux and A.A. Damour in 1842 for the type locality of Ottré, Belgium.
Mn analogue of chloritoid. Ottrélite was originally described as a Mn-rich, but not necessarily Mn-dominant chloritoid, consequently many "ottrélites" are in reality Mn-rich chloritoids, see Chloritoid best minerals article and references therein for further details.
Typically occurs in low- and medium-grade metamorphic rocks.

Monoclinic and triclinic polytypes are known.


Classification of OttréliteHide

IMA status:
Approved, 'Grandfathered' (first described prior to 1959)
Strunz 8th ed.:
8/B.24-30
Nickel-Strunz 10th (pending) ed.:
9.AF.85

9 : SILICATES (Germanates)
A : Nesosilicates
F : Nesosilicates with additional anions; cations in [4], [5] and/or only [6] coordination
Dana 8th ed.:
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
Hey's CIM Ref.:
16.16.21

16 : Silicates Containing Aluminum and other Metals
16 : Aluminosilicates of Mn

Physical Properties of OttréliteHide

Colour:
Pistachio-green, greenish to dark grey
Streak:
Greenish, greyish
Hardness:
6 - 7 on Mohs scale

Optical Data of OttréliteHide

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 OttréliteHide

Formula:
(Mn2+,Fe2+,Mg)Al2(SiO4)O(OH)2
IMA Formula:
Mn2+Al2O(SiO4)(OH)2
Elements listed:
Al, Fe, H, Mg, Mn, O, Si - search for minerals with similar chemistry
Common Impurities:
Ca,H2O

Crystallography of OttréliteHide

Crystal System:
Monoclinic
Cell Parameters:
a = 9.505(6) Å, b = 5.484(4) Å, c = 18.214(15) Å
β = 101.77(3)°
Ratio:
a:b:c = 1.733 : 1 : 3.321
Unit Cell V:
929.45 ų (Calculated from Unit Cell)
Twinning:
Polysynthetic, parallel to [001].
Comment:
Space group Cc or C2/c. Pseudohexagonal.

Type Occurrence of OttréliteHide

Synonyms of OttréliteHide

Other Language Names for OttréliteHide

Afrikaans:Ottrélite
Simplified Chinese:粒硬绿泥石

Relationship of Ottrélite to other SpeciesHide

Member of:
Chloritoid Group
Other Members of this group:
CarboiriteFeAl2(GeO4)O(OH)2Tric.
Chloritoid(Fe2+,Mg,Mn2+)Al2(SiO4)O(OH)2Mon. 2/m : B2/b
MagnesiochloritoidMgAl2(SiO4)O(OH)2Mon. 2/m : B2/b

Common AssociatesHide

Associated Minerals Based on Photo Data:
Quartz1 photo of Ottrélite associated with Quartz on mindat.org.
Malachite1 photo of Ottrélite associated with Malachite on mindat.org.

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) : 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.65Ribbeite(Mn2+,Mg)5(SiO4)2(OH)2Orth.
9.AF.70JerrygibbsiteMn2+9(SiO4)4(OH)2Orth. mmm (2/m 2/m 2/m) : Pbcn
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.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

52.3.3.1Chloritoid(Fe2+,Mg,Mn2+)Al2(SiO4)O(OH)2Mon. 2/m : B2/b
52.3.3.2MagnesiochloritoidMgAl2(SiO4)O(OH)2Mon. 2/m : B2/b
52.3.3.4CarboiriteFeAl2(GeO4)O(OH)2Tric.
52.3.3.4KumtyubeiteCa5(SiO4)2F2Mon. 2/m : P21/b
52.3.3.6HydroxylchondroditeMg5(SiO4)2(OH)2Mon. 2/m : P21/b

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

16.16.1KanonaiteMn3+Al(SiO4)OOrth. mmm (2/m 2/m 2/m) : Pnnm
16.16.2SpessartineMn2+3Al2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
16.16.3DavreuxiteMnAl6Si4O17(OH)2Mon.
16.16.4SursassiteMn2+2Al3(SiO4)(Si2O7)(OH)3Mon. 2/m : P21/m
16.16.5CarpholiteMn2+Al2(Si2O6)(OH)4Orth.
16.16.6KellyiteMn2+2Al(AlSiO5)(OH)4Hex.
16.16.7PennantiteMn2+5Al(AlSi3O10)(OH)8Tric.
16.16.8AkatoreiteMn2+9Al2Si8O24(OH)8Tric.
16.16.9Ganophyllite(K,Na,Ca)2Mn8(Si,Al)12(O,OH)32 · 8H2OMon.
16.16.10Mangano-ferri-eckermannite{Na}{Na2}{Mn2+4Fe3+}Si8O22(OH)2Mon.
16.16.11Masutomilite(K,Rb)(Li,Mn3+,Al)3(AlSi3O10)(F,OH)2Mon.
16.16.13HowieiteNa(Fe,Mn)10(Fe,Al)2Si12O31(OH)13Tric.
16.16.14Eggletonite(Na,K,Ca)2(Mn,Fe)8(Si,Al)12O29(OH)7 · 11H2OMon.
16.16.15Bannisterite(Ca,K,Na)(Mn2+,Fe2+)10(Si,Al)16O38(OH)8 · nH2OMon. 2/m : B2/b
16.16.16Taneyamalite(Na,Ca)(Mn,Mg,Fe)12Si12(O,OH)44Tric.
16.16.17ZussmaniteK(Fe,Mg,Mn)13(Si,Al)18O42(OH)14Trig. 3 : R3
16.16.18CoombsiteK(Mn,Fe,Mg)13(Si,Al)18O42(OH)14Trig.
16.16.19HenritermieriteCa3(Mn3+,Al)2(SiO4)2(OH)4Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
16.16.20MacfalliteCa2Mn3+3(SiO4)(Si2O7)(OH)3Mon.
16.16.22Piemontite{Ca2}{Al2Mn3+}(Si2O7)(SiO4)O(OH)Mon. 2/m : P21/m
16.16.23OkhotskiteCa2(Mn,Mg)(Mn3+,Al,Fe3+)2(Si2O7)(SiO4)(OH)2 · H2OMon.
16.16.24Pumpellyite-(Mn2+)Ca2Mn2+Al2(Si2O7)(SiO4)(OH)2 · H2OMon.
16.16.25Piemontite-(Sr){CaSr}{Al2Mn3+}(Si2O7)(SiO4)O(OH)Mon.

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 OttréliteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Descloizeaux, A., Damour A.A. (1842) De l'ottrélite. Nouvelle espèce minérale. Annales des Mines: 2: 357-361.
Hutchings, W.M. (1889) On the Occurrence of Ottrelite in the Phyllites of North Cornwall. Geological Magazine (Decade III): 6(5): 214-220.
Spencer, L.J. (1898) Supplementary list of British minerals. Mineralogical Abstracts: 30: 285.
Halferdahl, L.B. (1961) Chloritoid: its composition, X-ray and optical properties, stability and occurrences. Journal of Petrology: 2: 49-135.
Fransolet, A.-M. (1978) Données nouvelles sur l'ottrélite d'Ottré, Belgique. Bulletin de la Société française de Minéralogie et de Cristallographie: 101: 548-557.
Theye, T., Fransolet, A.-M. (1994) Virtually pure ottrelite from the region of Ottré, Belgium. European journal of mineralogy: 6(4): 547-555.
Fransolet, A.-M., Theye, T. (1997) On the Ardennes chloritoids and the ottrelite term (Cambrian, Belgium-French): A comment.
Neues Jahrbuch fur Mineralogie Monatshefte: 328-331.

Internet Links for OttréliteHide

Localities for OttréliteHide

ⓘ - 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.
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
        • Salmchâteau
- Fransolet, A.M., Kramm, U., Schreyer, W. (1977): Metamorphose und Magmatismus im Venn-Stavelot-Massiv, Ardennen, Fortschritte der Mineralogie, Vol. 55, Beiheft 2, pp.: 75-103
- Fransolet, A.M., Kramm, U., Schreyer, W. (1977): Metamorphose und Magmatismus im Venn-Stavelot-Massiv, Ardennen, Fortschritte der Mineralogie, Vol. 55, Beiheft 2, pp.: 75-103
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
      • Broughton
Système d'information géominière du Québec:
      • Les Appalaches RCM
Harvard Museum of Natural History
France
 
  • Occitanie
    • 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)
Poland
 
  • Lower Silesia
    • Lwówek District
      • Gierczyn-Przecznica area
        • Przecznica
Lis, J., Sylwestrzak, H., 1986. Minerały Dolnego Śląska. Instytut Geologiczny, Wydawnictwa Geologiczne, Warszawa, 791 pp.
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
UK
 
  • England
    • Cumbria
      • Allerdale
        • Keswick
Rastall, R.H. (1910) The Skiddaw granite and its metamorphism. Quarterly Journal of the Geological Society of London, 66, 116-141.; Cooper, M.P. and Stanley, C.J. (1990) Minerals of the English Lake District: Caldbeck Fells. Natural History Museum Publications, London, 160 pp. (referring to Rastall, 1910).
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.
Roberts, Willard Lincoln, and George Rapp, Jr. (1965), Mineralogy of the Black Hills, South Dakota School of Mines and Technology Bulletin 18.
  • Virginia
    • Bedford Co.
Minerals of Virginia 1990 by R. V. Dietrich
Mineral and/or Locality  
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