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Segnitite

Big Photo

Centennial Eureka Mine (Blue Rock), Tintic District, East Tintic Mts, Juab Co., Utah, USA
© Brent Thorne

Show Segnitite Photos (50)
Formula:
PbFe
3+
3
[(OH,H
 
2
O)
 
6
|(AsO
 
4
)
 
2
]
System:TrigonalColour:Greenish to ...
Hardness:4
Name:Named after E. Ralph Segnit (1923-1999) for his contributions to Australian mineralogy.


Alunite Supergroup, Crandallite Subgroup.
The arsenate analogue of Kintoreite.

Difficult to distinguish from Beudantite.

Classification of Segnitite

IMA status:Approved 1991
Strunz 8th edition ID:7/B.36-165
Nickel-Strunz 10th (pending) edition ID:8.BL.10

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
L : With medium-sized and large cations, (OH, etc.):RO4 = 3:1
Dana 8th edition ID:42.7.4.4

42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
7 : (AB)2(XO4)Zq·xH2O
Hey's CIM Ref.:20.5.13

20 : Arsenates (also arsenates with phosphate, but without other anions)
5 : Arsenates of Ti and Pb
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Type Occurrence of Segnitite

Type Locality:Kintore Opencut, Broken Hill, Yancowinna Co., New South Wales, Australia
Year of Discovery:1992

Occurrences of Segnitite

Geological Setting:Rare mineral found in the oxidation zone of hydrothermal ore deposits

Physical Properties of Segnitite

Lustre:Adamantine, Vitreous
Diaphaneity (Transparency):Transparent, Translucent
Colour:Greenish to yellowish-brown
Streak:Pale yellow
Hardness (Mohs):4
Tenacity:Brittle
Cleavage:Distinct/Good
Good on {0001}
Fracture:Irregular/Uneven
Density (measured):4.2 g/cm3
Density (calculated):4.77 g/cm3

Crystallography of Segnitite

Crystal System:Trigonal
Class (H-M):3m (3 2/m) - Hexagonal Scalenohedral
Space Group:R3m {R3 2/m}
Cell Parameters:a = 7.359(3) Å, c = 17.113(8) Å
Ratio:a:c = 1 : 2.325
Unit Cell Volume:V 802.59 ų (Calculated from Unit Cell)
Z:3
Morphology:Rhombohedral or pseudo-octahedral crystals

Optical Data of Segnitite

Type:Uniaxial (-)
RI values: nω = 1.975 nε = 1.955
Maximum Birefringence:δ = 0.020

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Very High
Pleochroism:Weak
Comments:Pale to medium yellow

Chemical Properties of Segnitite

Formula:
PbFe
3+
3
[(OH,H
 
2
O)
 
6
|(AsO
 
4
)
 
2
]
Essential elements:As, Fe, H, O, Pb
All elements listed in formula:As, Fe, H, O, Pb

Relationship of Segnitite to other Species

Series:Forms a series with Beudantite (see here)
Member of Group:
Crandallite Subgroup:
Related Minerals - Nickel-Strunz Grouping):

- +
8.BL.05Beudantite
PbFe
 
3
[(OH)
 
6
|SO
 
4
|AsO
 
4
]
8.BL.05Corkite
PbFe
 
3
[(OH)
 
6
|SO
 
4
|PO
 
4
]
8.BL.05Hidalgoite
PbAl
 
3
[(OH)
 
6
|SO
 
4
|AsO
 
4
]
8.BL.05Hinsdalite
PbAl
 
3
[(OH)
 
6
|SO
 
4
|PO
 
4
]
8.BL.05Kemmlitzite
(Sr,Ce)Al
 
3
[(OH)
 
6
|SO
 
4
|AsO
 
4
]
8.BL.05Orpheite
PbAl
 
3
[(OH)
 
6
|(PO
 
4
,SO
 
4
)
 
2
] (?)
8.BL.05Svanbergite
SrAl
 
3
[(OH)
 
6
|SO
 
4
|PO
 
4
]
8.BL.05Weilerite
8.BL.05Woodhouseite
CaAl
 
3
[(OH)
 
6
|SO
 
4
|PO
 
4
]
8.BL.05Gallobeudantite
PbGa
 
3
[(OH)
 
6
|SO
 
4
|AsO
 
4
]
8.BL.10Arsenogoyazite
SrAl
 
3
[(OH)
 
5
|(AsO
 
4
)
 
2
] · H
 
2
O
8.BL.10Arsenogorceixite
BaAl
 
3
[(OH)
 
5
|(AsO
 
4
)
 
2
] · H
 
2
O
8.BL.10Arsenocrandallite
(Ca,Sr)Al
 
3
[(OH)
 
5
|(AsO
 
4
,PO
 
4
)
 
2
] · H
 
2
O
8.BL.10Benauite
SrFe
3+
3
[(OH)
 
6
|(HPO
 
4
,PO
 
4
)|(PO
 
4
,SO
 
4
)]
8.BL.10Crandallite
CaAl
 
3
[(OH)
 
5
|(PO
 
4
)
 
2
] · H
 
2
O
8.BL.10Dussertite
BaFe
3+
3
[(OH)
 
5
|(AsO
 
4
)
 
2
]
8.BL.10Eylettersite
(Th,Pb)Al
 
3
[(OH)
 
6
|(PO
 
4
,SiO
 
4
)
 
2
] ?
8.BL.10Gorceixite
BaAl
 
3
[(OH)
 
5
|(PO
 
4
)
 
2
] · H
 
2
O
8.BL.10Goyazite
SrAl
 
3
[(OH)
 
5
|(PO
 
4
)
 
2
] · H
 
2
O
8.BL.10Kintoreite
PbFe
3+
3
[(OH,H
 
2
O)
 
6
|(PO
 
4
)
 
2
]
8.BL.10Philipsbornite
PbAl
 
3
[(OH)
 
5
|(AsO
 
4
)
 
2
] · H
 
2
O
8.BL.10Plumbogummite
PbAl
 
3
[(OH)
 
5
|(PO
 
4
)
 
2
] · H
 
2
O
8.BL.10Springcreekite
BaV
3+
3
[(OH,H
 
2
O)
 
6
|(PO
 
4
)
 
2
]
8.BL.13Arsenoflorencite-(La)
LaAl
 
3
[(OH)
 
6
|(AsO
 
4
)
 
2
]
8.BL.13Arsenoflorencite-(Nd)
NdAl
 
3
[(OH)
 
6
|(AsO
 
4
)
 
2
]
8.BL.13Arsenoflorencite-(Ce)
CeAl
 
3
[(OH)
 
6
|(AsO
 
4
)
 
2
]
8.BL.13Florencite-(Ce)
CeAl
 
3
[(OH)
 
6
|(PO
 
4
)
 
2
]
8.BL.13Florencite-(La)
LaAl
 
3
[(OH)
 
6
|(PO
 
4
)
 
2
]
8.BL.13Florencite-(Nd)
NdAl
 
3
[(OH)
 
6
|(PO
 
4
)
 
2
]
8.BL.13Waylandite
(Bi,Ca)Al
 
3
[(OH)
 
6
|(PO
 
4
,SiO
 
4
)
 
2
]
8.BL.13Zaïrite
Bi(Fe
3+
 
,Al)
 
3
[(OH)
 
6
|(PO
 
4
)
 
2
]
8.BL.13Arsenowaylandite
BiAl
 
3
(AsO
 
4
)
 
2
(OH)
 
6
8.BL.13Graulichite-(Ce)
CeFe
3+
3
[(OH)
 
6
|(AsO
 
4
)
 
2
]
8.BL.15Viitaniemiite
Na(Ca,Mn
2+
 
)Al[(F,OH)
 
3
|PO
 
4
]
8.BL.25Pattersonite
PbFe
3+
3
(PO
 
4
)
 
2
(OH)
 
4
{(H
 
2
O)
 
0.5
(OH)
 
0.5
}
 
2
Related Minerals - Hey's Index Grouping:

- +
20.5.1Cafarsite
Ca
 
8
(Ti,Fe,Fe,Mn)
 
6-7
(AsO
 
3
)
 
12
·4H
 
2
O
20.5.2Schultenite
PbHAsO
 
4
20.5.3Duftite
PbCu[OH|AsO
 
4
]
20.5.4Bayldonite
Cu
 
3
Pb[OH|AsO
 
4
]
 
2
20.5.5Philipsbornite
PbAl
 
3
[(OH)
 
5
|(AsO
 
4
)
 
2
] · H
 
2
O
20.5.6Arsendescloizite
PbZn[OH|AsO
 
4
]
20.5.7Helmutwinklerite
Pb(Zn,Cu)
 
2
[AsO
 
4
]
 
2
 · 2H
 
2
O
20.5.8Thometzekite
Pb(Cu,Zn)
 
2
[AsO
 
4
,SO
 
4
]
 
2
 · 2(H
 
2
O,OH)
20.5.9Caryinite
(Na,Pb)(Ca,Na)(Ca,Mn
2+
 
)(Mn
2+
 
,Mg,Fe
3+
 
)
 
2
[AsO
 
4
]
 
3
20.5.10Ludlockite
PbFe
3+
4
As
3+
10
O
 
22
20.5.11Gabrielsonite
PbFe[OH|AsO
 
4
]
20.5.12Carminite
PbFe
3+
2
[OH|AsO
 
4
]
 
2
20.5.14Tsumcorite
Pb(Zn,Fe
3+
 
)
 
2
[AsO
 
4
]
 
2
 · 2(H
 
2
O,OH)
20.5.15Jamesite
Pb
 
2
Zn(Fe
2+
 
,Zn)
 
2
Fe
3+
4
[(OH)
 
10
|(AsO
 
4
)
 
4
]
20.5.16Mawbyite
Pb(Fe
3+
 
,Zn)
 
2
[AsO
 
4
]
 
2
 · 2(OH,H
 
2
O)
20.5.17Arsenbrackenbuschite

Other Names for Segnitite

Synonyms:
IMA1991-017
Other Languages:
German:Segnitit
Spanish:Segnitita

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 Segnitite

Reference List:Birch, W. D., Pring, A. & Gatehouse, B. M. (1992): Segnitite, PbFe3H(AsO4)2(OH)6, a new mineral in the lusungite group from Broken Hill, New South Wales, Australia. American Mineralogist: 77: 656-659.

New Minerals (1997), New Minerals 1990-1994.

Internet Links for Segnitite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Segnitite in the Natural History Museum (London) online catalogue
  • Segnitite details from Handbook of Mineralogy (PDF)
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    Localities for Segnitite

    Hide Locality List
    The 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. ? 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.
    Australia
     
    • New South Wales
      • Robinson Co.
        • Cobar
          • Cobar
    		http://leme.anu.edu.au/Pubs/Advancesinregolith/Leverett_et_al.pdf
      • Yancowinna Co.
        • Broken Hill
    		AM 1992, 656-9, Australian Min. 3:1 (1997)
    • Northern Territory
      • Grove Hill
    		No reference listed
    • South Australia
      • Mt Lofty Ranges
        • South Mt Lofty Ranges
          • Clarendon
    		Kolitsch, U. and Elliott, P. (1999): Mineralogy of the Mount Malvern Mine near Clarendon, South Australia. Australian J. Mineral. 5, 3-17.
    • Western Australia
    Austria
     
    • Styria
      • Birkfeld
        • Gasen
    		Bojar, H.-P. (2004)
      • Fischbacher Alpen Mts
        • Krieglach
          • Teschengraben
    		Tomazic, P. (1999): Der Blei-Zink Bergbau Freßnitzkogel - Stanglalm, Mürztal, Steiermark, Österreich. Annalen, Journal of science and art, 1, 57-62
    Brazil
     
    • Central-West Region
      • Goiás
        • Monte Alegre de Goiás
    		Márcia Abrahão Moura, Nilson Francisquini Botelho and Fábio Carvalho de Mendonça (2007): The indium-rich sulfides and rare arsenates of the Sn–In-mineralized Mangabeira A-type granite, Central Brazil. Canadian Mineralogist 45, 485-496.
    Chile
     
    • Atacama Region
      • Copiapó Province
    		Dr. Robert A. Jenkins collection
    Czech Republic
     
    • Bohemia (Böhmen; Boehmen)
      • Karlovy Vary Region
        • Krušné Hory Mts (Erzgebirge)
    		Rojík, P. (2006): J. Czech Geol. Soc. 50 (3-4), 157-165.
    France
     
    • Alsace
      • Haut-Rhin
        • Cernay
          • Steinbach
    		Mines, mineurs et minéralogie du Silberthal, tomes 1 et 2
        • Rouffach
          • Osenbach
    		Wittern, Journée: "Mineralien finden in den Vogesen", von Loga (Cologne), 1997
    • Auvergne
      • Allier
        • Ébreuil
          • Échassières
    		Le Règne Minéral, (33), 5-25.
    Germany
     
    • Baden-Württemberg
      • Black Forest
        • Bad Krozingen
          • Ehrenstetten
    		K. Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
        • Elz valley
          • Waldkirch
    		Lapis 21(12), 43 (1996)
        • Emmendingen
    		K. Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
        • Freiburg im Breisgau
          • Schauinsland Mt.
    		K. Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
        • Gengenbach
          • Haigerach valley
    		Wittern,A. (1995) Mineralien finden im Schwarzwald
        • Haslach
          • Fischerbach
    		K. Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
        • Hausach
          • Einbach valley
    		[Wittern,A. (1995) Mineralien finden im Schwarzwald]
        • Lahr
          • Reichenbach
            • Schuttertal
    		Lapis 21(12), 42-43 (1996)
            • Weiler
    		Wittern: "Mineralfundorte in Deutschland", 2001
        • Menzenschwand
    		Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
        • Münstertal
          • Belchen Mt.
    		K. Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
          • Staufen
    		K. Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
            • Grunern
    		K. Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
        • Oberkirch
          • Ödsbach
    		K. Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
        • Schapbach
          • Tiefenbach valley
    		K. Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
        • Schenkenzell
          • Wittichen
    		K. Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
        • St Ulrich
    		K. Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
        • Sulzburg
    		K. Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
    K. Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
        • Todtnau
    		http://www.mineralienatlas.de/lexikon/index.php/Deutschland/Baden-W%FCrttemberg/Schwarzwald/Todtnau/Lisb%FChl
          • St Wilhelm
    		K. Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
        • Wolfach
          • Oberwolfach
            • Gelbach valley
    		Wittern: "Mineralfundorte in Deutschland", 2001
            • Rankach valley
    		WALENTA, K. (1994): Beudantit, sulfatfreier Beudantit und Segnitit. - Lapis 19 (1), 23-26.
        • Zell am Harmersbach
          • Biberach
    		K. Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
    • Lower Saxony
      • Harz Mts
        • St Andreasberg District
          • St Andreasberg
    		J. Gröbner: Neufunde aus den Bergbaurevieren St. Andreasberg, Bad Lauterberg und von Oberschulenberg im Harz, MINERALIEN-WELT 18 (2007), 43-51.
    • Saxony
      • Erzgebirge
        • Oberwiesenthal
          • Niederschlag
    		Lapis, 19 (4), 13-22+50.
    Wittern: "Mineralfundorte in Deutschland", 2001
    Germany & Czech Republic
     
    • Saxony & Ústí Region (Bohemia; Böhmen; Boehmen)
      • Erzgebirge; Krusné Hory Mts
    		Jansa, J., Novák, F., Pauliš, P., Scharmová, M.: Supergenní minerály Sn-W ložiska Cínovec v Krušných horách (Česká republika). Bulletin mineralogicko-petrografického oddělení Národního muzea v Praze, 1998, roč. 6, s. 83-101.
    Greece
     
    • Attikí (Attica; Attika) Prefecture
      • Lavrion (Laurion; Laurium) District
        • Lavrion District Mines
          • Agios Konstantinos [St Constantine] (Kamariza)
            • Kamariza Mines (Kamareza Mines)
    		No reference listed
          • Plaka
            • Plaka Mines
    		No reference listed
          • Sounion Area
            • Agia Varvara Mines (St Barbara Mines)
    		No reference listed
            • Sounion Mines
    		Lapis, 24, 7/8 (1999)
    Hungary
     
    • Baranya Co.
      • Mecsek Mts.
        • Pécs
    		Acta Min. Petro.(Szeged): Szakáll- Birch-Kovács-Postl: Arsenate minerals from Hungary, 1994
    • Fejér Co.
      • Szár Hill
        • Szabadbattyán
    		Szakáll: Minerals of Szár Hill, 2004
      • Velencei Mts.
        • Lovasberény
    Szakáll-Gatter-Szendrei: Mineral species of Hungary, 2005
        • Pátka
    		Szakáll-Gatter-Szendrei: Mineral species of Hungary, 2005
    • Heves Co.
      • Mátra Mts.
        • Parádfürdő
    		AMP, Sb-oxide minerals in Hungary,2000
    • Pest Co.
      • Börzsöny Mts.
        • Nagybörzsöny
    		Szakáll & Jánosi: Minerals of Hungary, 1995
    Italy
     
    • Piedmont
      • Torino Province
        • Borgofranco d'Ivrea
          • Biò
    		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.
        • Canavese District
          • Chiusella Valley
            • Traversella
    		SEM/EDS 18/09/2001 MNHN-Paris
    • Sardinia
      • Medio Campidano Province
        • Gonnosfanadiga
          • Fenugu Sibiri Mine
    		Identificata da Italo Campostrini presso il Dipartimento di Chimica dell'Università di Milano.
    Japan
     
    • Honshu Island
      • Chubu Region
        • Gifu Prefecture
          • Nakatsugawa City
            • Hirukawa
    		Matsubara & Matsuyama (1997) Koubutsugaku Zasshi, 26, 181-184.
      • Chugoku Region
        • Yamaguchi Prefecture
    		Shibata et al (1998) Koubutsu-Gakkai Kou\'en-Youshi, 47.
    Mexico
     
    • Durango
      • Mun. de Mapimí
        • Mapimí
    		Mineralogical Record (2003) 34:5 The Ojuela Mine
    Namibia
     
    • Erongo Region
      • Karibib District
    		Schnaitmann, E. A., Nägele, H., Niedermayr, G., Brandstätter, F. & Jahn, S. (2007): Das Metazeunerit-Pocket auf Tubussis 22, Erongo. Mineralien-Welt 18 (2), 33-43. (in German)
      • Usakos and Omaruru Districts
    		Collection of NHM, Vienna
    • Otjikoto (Oshikoto) Region
      • Tsumeb
    		Gebhard, G. (1999): Tsumeb II. A Unique Mineral Locality. GG Publishing, Grossenseifen, Germany
    Portugal
     
    • Viana do Castelo District
      • Caminha
      • Ponte de Lima
        • Estorãos
    • Vila Real District
      • Ribeira de Pena
        • Cerva
    		Nuno Afonso collection (XRD-analysed)
    • Viseu District
      • São Pedro do Sul
        • Manhouce
          • Gestoso
            • Alto das Quelhas do Gestoso Mines
    Spain
     
    • Castile-La Mancha
      • Guadalajara
        • Pardos
    		J. Gröbner und B. Sainz de Barranda (1999): Die Mineralien der Kupfergrube bei Pardos in der Provinz Guadalajara, Spanien. Mineralien-Welt 10 (4), 26-31. (in German)
    Switzerland
     
    • Wallis (Valais)
      • Martigny
        • Mont Chemin
    UK
     
    • England
      • Cornwall
        • Mount's Bay District
          • St Hilary
    		No reference listed
      • Cumbria
        • North and Western Region (Cumberland)
          • Caldbeck Fells
    		Journal of The Russell Society, Volume 9, 2006
            • Roughton Gill
    		Journal of The Russell Society, Volume11, 2008
    USA
     
    • Idaho
      • Lemhi Co.
        • Blue Wing District
          • Patterson
    		Ream, L. (2005): Segnitite and other secondary minerals at the Ima Mine, Lemhi County, Idaho. Mineral News, 21, 4-5.
    • Nevada
      • Mineral Co.
        • Fitting District
          • Luning
            • Rhyolite Pass
    		Marco Ciriotti collection (analysed by SEM-EDS, 2005)
    • Utah
      • Juab Co.
        • East Tintic Mts
          • Tintic District
    		Min Rec 26:5 pp475-499
    Mineral and/or Locality
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