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Biotite from
Sur les Roches quarry, Bastogne, Luxembourg, Wallonia, Belgium


Locality type:Quarry
Classification
Species:'Biotite' (not an IMA approved species)
Formula:K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Comments:"The biotite from Bastogne, particularly poor in potassium and rich in ferric iron and water, shows an enrichment in NH4+ (Darimont et al., 1988). An alteration of the mineral is evident by whitening and a variation in the optical axes angle. The X-ray powder diagram reveals a peak at 14Å, which could indicate a vermiculitisation phenomenon." (Hatert et al, 2002)
Habit:lamellae up to a few centimetres
Confirmation
Validity:Confirmed
Confirmation Methods:XRD
Associated Minerals Based on Photo Data:
Quartz1
Data
Mineral Data:Click here to view Biotite data
Locality Data:Click here to view Sur les Roches quarry, Bastogne, Luxembourg, Wallonia, Belgium
Data Identifiers
Mindat Occurrence Record ID:85115
Long-form Identifier:1:3:85115:8
GUID (UUID V4):0
Nearest other occurrences of Biotite
18.3km (11.3 miles) ⓘLorette chapel, Moircy, Libramont-Chevigny, Luxembourg, Wallonia, Belgium
22.1km (13.8 miles) ⓘRenaumont, Sainte-Marie-Chevigny, Libramont-Chevigny, Luxembourg, Wallonia, Belgium
23.6km (14.6 miles) ⓘSéviscourt, Libramont-Chevigny, Luxembourg, Wallonia, Belgium
23.8km (14.8 miles) ⓘSainte-Marie, Neufchâteau, Luxembourg, Wallonia, Belgium
26.3km (16.3 miles) ⓘRoche Falîche, Bihain, Vielsalm, Luxembourg, Wallonia, Belgium
27.8km (17.2 miles) ⓘLamouline, Saint-Pierre, Libramont-Chevigny, Luxembourg, Wallonia, Belgium
27.8km (17.3 miles) ⓘRegné, Bihain, Vielsalm, Luxembourg, Wallonia, Belgium
31.7km (19.7 miles) ⓘArdennite-quartz veins, Salmchâteau, Vielsalm, Luxembourg, Wallonia, Belgium
39.0km (24.2 miles) ⓘLa Flèche quarry, Bertrix, Luxembourg, Wallonia, Belgium
63.4km (39.4 miles) ⓘGoldberg, Ormont, Gerolstein, Vulkaneifel, Rhineland-Palatinate, Germany
References
Corin, F. (1931) Sur la présence de xénotime et d'autres minéraux contenant des terres rares dans les veines à bastonite de Bastogne. Bulletin de la Société belge de Géologie, XLI, 109-111.
Buttgenbach, H. (1947) Les Minéraux de Belgique et du Congo belge. Dunod. 573pp.
Darimont, A., Burke, E., Touret, J. (1988) Nitrogen-rich metamorphic fluids in Devonian metasediments from Bastogne, Belgium. Bulletin de Minéralogie, 111, 321.
Hatert, F., Deliens, M., Houssa, M., Coune, F. (2000) Native gold, native silver and secondary minerals in the quartz veins from Bastogne, Belgium. Bulletin de l'Institut royal des Sciences naturelles de Belgique, Sciences de la Terre, 70, 223-229.
Hatert, F., Deliens, M., Fransolet, A.-M., Van Der Meersche, E. (2002) Les minéraux de Belgique (2nd ed.) Muséum des Sciences Naturelles, Bruxelles.
 
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