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Neustädtelite

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Big Photo

Pucher Shaft, Wolfgang Maaßen Mine field, Schneeberg District, Erzgebirge, Saxony, Germany
© Stephan Wolfsried

Show Neustädtelite Photos (6)



Formula:
Bi
3+
2
Fe
3+
 
(Fe
3+
 
,Co)
 
2
(AsO
 
4
)
 
2
(OH,O)
 
4
System:TriclinicColour:Brown, brown-red, black
Lustre:AdamantineHardness:4½
Name:For the type locality


Ferric iron (Fe3+) analogue of Medenbachite.

Classification of Neustädtelite

IMA status:Approved 1998
Strunz 8th edition ID:7/B.37-15
Strunz 9th edition ID:8.BK.10
Nickel-Strunz 10th (pending) edition ID:8.BK.10

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
K : With medium-sized and large cations, (OH, etc.):RO4 = 2:1, 2.5:1
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Type Occurrence of Neustädtelite

Type Locality:Güldener Falk Mine, Neustädtel, Schneeberg District, Erzgebirge, Saxony, Germany

Physical Properties of Neustädtelite

Lustre:Adamantine
Diaphaneity (Transparency):Transparent, Translucent
Colour:Brown, brown-red, black
Streak:Light brown
Hardness (Mohs):4½
Cleavage:Distinct/Good
on {001}
Density (calculated):5.81 g/cm3

Crystallography of Neustädtelite

Crystal System:Triclinic
Class (H-M):1 - Pinacoidal
Space Group:P1
Cell Parameters:a = 4.556Å, b = 6.153Å, c = 8.894Å
α = 95.43°, β = 99.22°, γ = 92.95°
Ratio:a:b:c = 0.74 : 1 : 1.445
Unit Cell Volume:V 244.437 ų
Z:1
X-Ray Powder Diffraction:
d-spacingIntensity
8.864 (30)
3.772 (90)
3.539 (100)
3.495 (70)
2.913 (70)
2.797 (50)
2(
674 (40)

Optical Data of Neustädtelite

Type:Biaxial (-)
RI values: nα = 2.020 nβ = 2.080 nγ = 2.120
Maximum Birefringence:δ = 0.100

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Very High
Dispersion:relatively weak

Chemical Properties of Neustädtelite

Formula:
Bi
3+
2
Fe
3+
 
(Fe
3+
 
,Co)
 
2
(AsO
 
4
)
 
2
(OH,O)
 
4
Essential elements:As, Bi, Fe, H, O
All elements listed in formula:As, Bi, Co, Fe, H, O

Relationship of Neustädtelite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
8.BK.05Brazilianite
NaAl
 
3
(PO
 
4
)
 
2
(OH)
 
4
8.BK.10Medenbachite
Bi
3+
2
Fe
3+
 
(Cu,Fe
3+
 
)(AsO
 
4
)
 
2
(OH,O)
 
4
8.BK.10Cobaltneustädtelite
Bi
3+
2
Fe
3+
 
(Co,Fe
3+
 
)
 
2
(AsO
 
4
)
 
2
(OH,O)
 
4
8.BK.15Curetonite
Ba
 
4
Al
 
3
Ti(PO
 
4
)
 
4
(O,OH)
 
6
8.BK.20Heyite
Pb
 
5
Fe
2+
2
(VO
 
4
)
 
2
O
 
4
8.BK.25Jamesite
Pb
 
2
Zn(Fe
2+
 
,Zn)
 
2
Fe
3+
4
(AsO
 
4
)
 
4
(OH)
 
10
8.BK.25Lulzacite
Sr
 
2
Fe
2+
 
(Fe
2+
 
,Mg)
 
2
Al
 
4
(PO
 
4
)
 
4
(OH)
 
10

Other Names for Neustädtelite

Synonyms:
IMA1998-016
Other Languages:
German:Neustädtelit
Russian:Нойштадтелит
Spanish:Neustädtelita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Neustädtelite

Reference List:

- +
Mitt. Osterreich Mineral. Gesellshaft (2001): 146: 157-159.

Krause, W., H.-J. Bernhardt, C. McCammon & H. Effenberger (2002): Neustädtelite and cobaltneustädtelite, the Fe3+- and Co2+- analogues of medenbachite.- American Mineralogist: 87: 726-738.

Internet Links for Neustädtelite

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  • Raman and XRD data at RRUFF project
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  • Neustädtelite details from Handbook of Mineralogy (PDF)
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    • Localities for Neustädtelite

    Hide Locality List
    (TL) indicates type locality. ? 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.
    Germany
     
    • Bavaria
      • Franconia
        • Franconian Forest
          • Bad Steben
            • Lichtenberg
              • Lichtenberg Copper mines
    		Meier, S. and Dünkel, B. (2010): Mineralien von der Dorschenmühle bei Lichtenberg, Franken. Lapis, 35 (10), 60-64; 90.
    Meier, S. and Dünkel, B. (2010): Mineralien von der Dorschenmühle bei Lichtenberg, Franken. Lapis, 35 (10), 60-64; 90.
    Lapis 27(7/8):76 (2002)
    • Saxony
      • Erzgebirge
        • Marienberg District
          • Lauta
    		Hajek, W. (2010): Kristallwelten Marienberg. Weise Verlag, München.
        • Schneeberg District
          • Neustädtel
    		Lapis 30(7/8):68-69 (2005)
    Lapis 30(7/8):41-70 (2005)
    W. Krause, H.-J. Bernhardt, C. McCammon & H. Effenberger (2002): Neustädtelite and cobaltneustädtelite, the Fe3+- and Co2+- analogues of medenbachite.- American Mineralogist 87, 726 - 738
    Am. Min. 87:726-738
    Lapis 30(7/8):68-69 (2005)
    Lapis 30(7/8):68-69 (2005)
    Lapis 30(7/8):68-69 (2005)
    Lapis 30(7/8):68-69 (2005)
    Lapis 30(7/8):68-69 (2005)
          • Wolfgang Maaßen Mine field
    		Am. Min. 87:726-738
    Lapis 30(7/8):68-69 (2005)
      • Vogtland
        • Oelsnitz
    		Gröbner, J. and Kolitsch, U. (2007): The minerals of the uranium prospect at Tirpersdorf, Vogtland. Lapis 32, 37-42; 58. (in German)
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    Copyright © Jolyon Ralph and Ida Chau 1993-2013. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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