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Brendelite

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About BrendeliteHide

Christian Friedrich Brendel
Formula:
(Bi3+,Pb)2(Fe3+,Fe2+)(PO4)O2(OH)
Colour:
dark brown, black
Lustre:
Adamantine, Vitreous
Hardness:
Specific Gravity:
6.83 (Calculated)
Crystal System:
Monoclinic
Name:
Named for Christian Friedrich Brendel (26 December 1776 in Neustädtel - 20 November 1861 in Freiberg), mining Director at Schneeberg-Neustädtel, in recognition of his development and application of mechanized mining technology.
Structurally related to namibite. One of three Bi-Fe phosphate minerals beside paulkellerite and zaïrite.

Phosphate and hydroxyl groups are disordered. An ordered structure model was built basing on a doubled parameter b. The structure details/elements:
- FeO6 octahedra
- PO4 tetrahedra
- Fe2(Oo)4(Oh)2(PO4)2 chains || [010], formed by corner-sharing of the above polyhedra (first type of chains)
- hydrogen bonds, that link the chains in (100)
- edge-connected (Bi,Pb)[1+4]O5 polyhedra, that form (Bi,Pb)2(Oo)2(Op)2 chains || [010] (second type of chains).
Chains of the first and second type have common corners and edges.


Classification of BrendeliteHide

Approved
Approval Year:
1997
8.BM.15

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
M : With medium-sized and large cations, (OH, etc.):RO4 = 4:1

Physical Properties of BrendeliteHide

Adamantine, Vitreous
Colour:
dark brown, black
Streak:
light brown
Hardness:
4½ on Mohs scale
Cleavage:
None Observed
Density:
6.83 g/cm3 (Calculated)
Comment:
couldn't be measured

Optical Data of BrendeliteHide

Type:
Biaxial (-)
RI values:
nα = 2.060 nβ = 2.150 nγ = 2.190
Max Birefringence:
δ = 0.130
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
r < v strong
Pleochroism:
Strong
Comments:
dark brown to opaque (Y=Z), light brown to brown (X)

Chemical Properties of BrendeliteHide

Formula:
(Bi3+,Pb)2(Fe3+,Fe2+)(PO4)O2(OH)
IMA Formula:
(Bi,Pb)2(Fe3+,Fe2+)O2(OH)(PO4)
Common Impurities:
Pb,Fe(II)

Crystallography of BrendeliteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Setting:
C2/m
Cell Parameters:
a = 12.278(2) Å, b = 3.815(1) Å, c = 6.899(1) Å
β = 111.14(1)°
Ratio:
a:b:c = 3.218 : 1 : 1.808
Unit Cell V:
301.4 ų
Z:
2

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
5.726 (54)
3.372 (77)
3.322 (37)
3.217 (46)
3.011 (100)
2.863 (34)
2.750 (62)

Type Occurrence of BrendeliteHide

General Appearance of Type Material:
tabular to blocky crystals to 0.3 mm, hemispheres with a radiating structure to 3 mm across.
Place of Conservation of Type Material:
Staatliches Museum für Mineralogie und Geologie, Dresden, Germany.
Geological Setting of Type Material:
secondary, very rare, in dump material of a Bi-Co-Ni-Ag deposit
Associated Minerals at Type Locality:

Synonyms of BrendeliteHide

Other Language Names for BrendeliteHide

Related Minerals - Nickel-Strunz GroupingHide

8.BM.Betpakdalite-NaNa[Na2(H2O)16Na(H2O)6][Mo8As2Fe3+3O33(OH)4] Mon. 2/m : B2/m
8.BM.05Retzian-(Ce)Mn2+2Ce(AsO4)(OH)4Orth. mmm (2/m 2/m 2/m) : Pban
8.BM.05Retzian-(La)(Mn2+,Mg)2(La,Ce,Nd)(AsO4)(OH)4Orth. mmm (2/m 2/m 2/m) : Pban
8.BM.05Retzian-(Nd)Mn2+2(Nd,Ce,La)(AsO4)(OH)4Orth. mmm (2/m 2/m 2/m) : Pban
8.BM.10Paulkellerite(BiO)2Fe3+(PO4)(OH)2Mon. 2/m : B2/b
8.BM.10KolitschitePbZn0.5Fe3(AsO4)2(OH)6Mon. 2/m : B2/b

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 BrendeliteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Krause, W., Bernhardt, H.-J., McCammon, C., and Effenberger, H. (1998) Brendelite, (Bi,Pb)2Fe3+,2+O2(OH)(PO4), a new mineral from Schneeberg, Germany: description and crystal structure. Mineralogy and Petrology: 63: 263-277.
Jambor, J.L., Pertsev, N.N., and Roberts, A.C. (1999) New mineral names. American Mineralogist: 84: 1195-1198.
Lapis (2005) 30(7/8): 67.
Anthony, J.W., Bideaux, R.A., Bladh, K.W. and Nichols, M.C., Eds. Handbook of Mineralogy, Mineralogical Society of America, Chantilly, VA 20151-1110, USA. http://www.handbookofmineralogy.org/ (2016)

Internet Links for BrendeliteHide

Localities for BrendeliteHide

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.
Germany
 
  • Saxony
    • Erzgebirge District
      • Johanngeorgenstadt District
        • Johanngeorgenstadt
Gröbner, J., Grimm, O. & Zienau, H. (2005): Neufunde interessanter Wismut- und Uranmineralien am Schaarschacht, Johanngeorgenstadt, Sachsen. Lapis 30 (6), 44-51; 62.
      • Schneeberg
        • Neustädtel
Krause, W., Bernhardt, H.-J., McCammon, C., and Effenberger, H. (1998) Brendelite, (Bi,Pb)2Fe3+,2+O2(OH)(PO4), a new mineral from Schneeberg, Germany: description and crystal structure. Mineralogy and Petrology: 63: 263-277.; Jambor, J.L., Pertsev, N.N., and Roberts, A.C. (1999) New mineral names. American Mineralogist: 84: 1195-1198.
Mineral and/or Locality  
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