Segnitite
A valid IMA mineral species
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About Segnitite
Formula:
PbFe3+3AsO4(AsO3OH)(OH)6
May contain, as other Fe(III) members, minor Sb, Cu and Zn substituting for Fe.
Colour:
Greenish to yellowish-brown
Lustre:
Adamantine, Vitreous
Hardness:
4
Specific Gravity:
4.2
Crystal System:
Trigonal
Member of:
Name:
Named in honor of Edgar Ralph Segnit (5 September 1923, Adelaide, South Australia, Australia - 13 July 1999, Melbourne, Australia), geologist and gemmologist at CSIRO Division of Mineral Chemistry in Melbourne, for his contributions to Australian mineralogy.
The arsenate analogue of kintoreite.
Difficult to distinguish from beudantite, with which it forms a series.
Related to kolitschite.
Difficult to distinguish from beudantite, with which it forms a series.
Related to kolitschite.
Unique Identifiers
Mindat ID:
3606
Long-form identifier:
mindat:1:1:3606:7
GUID
(UUID V4):
(UUID V4):
9c4f64d9-b80a-458c-a5e8-0e63fc067dd4
IMA Classification of Segnitite
Classification of Segnitite
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
8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
L : With medium-sized and large cations, (OH, etc.):RO4 = 3:1
42.7.4.4
42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
7 : (AB)2(XO4)Zq·xH2O
42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
7 : (AB)2(XO4)Zq·xH2O
20.5.13
20 : Arsenates (also arsenates with phosphate, but without other anions)
5 : Arsenates of Ti and Pb
20 : Arsenates (also arsenates with phosphate, but without other anions)
5 : Arsenates of Ti and Pb
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Sgt | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Segnitite
Adamantine, Vitreous
Transparency:
Transparent, Translucent
Colour:
Greenish to yellowish-brown
Streak:
Pale yellow
Hardness:
4 on Mohs scale
Tenacity:
Brittle
Cleavage:
Distinct/Good
Good on {0001}
Good on {0001}
Fracture:
Irregular/Uneven
Density:
4.2 g/cm3 (Measured) 4.77 g/cm3 (Calculated)
Optical Data of Segnitite
Type:
Uniaxial (-)
RI values:
nω = 1.975 nε = 1.955
Max Birefringence:
δ = 0.020
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Very High
Pleochroism:
Weak
Comments:
Pale to medium yellow.
Chemistry of Segnitite
Mindat Formula:
PbFe3+3AsO4(AsO3OH)(OH)6
May contain, as other Fe(III) members, minor Sb, Cu and Zn substituting for Fe.
May contain, as other Fe(III) members, minor Sb, Cu and Zn substituting for Fe.
Chemical Analysis
Oxide wt%:
| 1 | |
|---|---|
| PbO | 28.13 % |
| ZnO | 0.21 % |
| Fe2O3 | 32.04 % |
| As2O5 | 28.83 % |
| SO3 | 0.86 % |
| H2O calc | 7.94 % |
| Total: | 98.01 % |
Sample references:
Crystallography of Segnitite
Crystal System:
Trigonal
Class (H-M):
3m (3 2/m) - Hexagonal Scalenohedral
Space Group:
R3m
Cell Parameters:
a = 7.359(3) Å, c = 17.113(8) Å
Ratio:
a:c = 1 : 2.325
Unit Cell V:
802.59 ų (Calculated from Unit Cell)
Z:
3
Morphology:
Rhombohedral (mainly acute rhombohedra), pseudo-octahedral, pseudo-cubic or tabular crystals; very rarely also acicular.
The principal forms present in the type material are {112} and {001}.
The principal forms present in the type material are {112} and {001}.
Twinning:
None observed
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.092 Å | (100) |
| 5.966 Å | (50) |
| 3.678 Å | (40) |
| 2.283 Å | (30) |
| 1.992 Å | (30) |
| 1.840 Å | (25) |
| 2.849 Å | (20) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47c : [Carbonates, phosphates, borates, nitrates] | |
| 47d : [Arsenates, antimonates, selenates, bismuthinates] |
Geological Setting:
Rare mineral found in the oxidation zone of hydrothermal ore deposits.
Type Occurrence of Segnitite
General Appearance of Type Material:
Greenish brown to yellowish brown, pseudo-octahedral crystals up to 1 mm across, and as aggregates, crusts and clusters of yellowish brown rhombohedral crystals up to 5 mm high.
Place of Conservation of Type Material:
Museum Victoria, Melbourne, Australia, M30044.
Geological Setting of Type Material:
Oxidation of primary ore rich in galena and arsenopyrite-loellingite.
Associated Minerals at Type Locality:
Synonyms of Segnitite
Other Language Names for Segnitite
Spanish:Segnitita
Relationship of Segnitite to other Species
Member of:
Other Members of this group:
| Arsenocrandallite | CaAl3(AsO4)(AsO3OH)(OH)6 | Trig. 3m (3 2/m) |
| Arsenoflorencite-(Ce) | CeAl3(AsO4)2(OH)6 | Trig. 3m (3 2/m) : R3m |
| Arsenoflorencite-(La) | LaAl3(AsO4)2(OH)6 | Trig. 3m (3 2/m) : R3m |
| Arsenoflorencite-(Nd) | NdAl3(AsO4)2(OH)6 | Trig. |
| Arsenogorceixite | BaAl3(AsO4)(AsO3OH)(OH)6 | Trig. 3m (3 2/m) : R3m |
| Arsenogoyazite | SrAl3(AsO4)(AsO3OH)(OH)6 | Trig. 3m (3 2/m) : R3m |
| Arsenowaylandite | BiAl3(AsO4)2(OH)6 | Trig. |
| Dussertite | BaFe3+3(AsO4)(AsO3OH)(OH)6 | Trig. 3m (3 2/m) : R3m |
| Graulichite-(Ce) | CeFe3+3(AsO4)2(OH)6 | Trig. 3m (3 2/m) : R3m |
| Graulichite-(La) | LaFe3+3(AsO4)2(OH)6 | Trig. 3m (3 2/m) : R3m |
| Philipsbornite | PbAl3(AsO4)(AsO3OH)(OH)6 | Trig. 3m (3 2/m) : R3m |
Forms a series with:
Common Associates
Associated Minerals Based on Photo Data:
| 151 photos of Segnitite associated with Carminite | PbFe3+2(AsO4)2(OH)2 |
| 46 photos of Segnitite associated with Mimetite | Pb5(AsO4)3Cl |
| 36 photos of Segnitite associated with Quartz | SiO2 |
| 34 photos of Segnitite associated with Scorodite | Fe3+AsO4 · 2H2O |
| 31 photos of Segnitite associated with Beudantite | PbFe3(AsO4)(SO4)(OH)6 |
| 13 photos of Segnitite associated with Goethite | α-Fe3+O(OH) |
| 9 photos of Segnitite associated with Duftite | PbCu(AsO4)(OH) |
| 8 photos of Segnitite associated with Lepidocrocite | γ-Fe3+O(OH) |
| 8 photos of Segnitite associated with Arsenbrackebuschite | Pb2Fe3+(AsO4)2(OH) |
| 7 photos of Segnitite associated with Bariopharmacosiderite | Ba0.5Fe3+4(AsO4)3(OH)4 · 5H2O |
Related Minerals - Strunz-mindat Grouping
| 8.BL. | Graulichite-(La) | LaFe3+3(AsO4)2(OH)6 |
| 8.BL. | Oberwolfachite | SrFe3+3(AsO4)(SO4)(OH)6 |
| 8.BL. | Kiryuite | NaMnAl(PO4)F3 |
| 8.BL. | Cloudite | BaFe3+3(PO4)(SO4)(OH)6 |
| 8.BL.05 | Beudantite | PbFe3(AsO4)(SO4)(OH)6 |
| 8.BL.05 | Corkite | PbFe3(PO4)(SO4)(OH)6 |
| 8.BL.05 | Hidalgoite | PbAl3(AsO4)(SO4)(OH)6 |
| 8.BL.05 | Hinsdalite | PbAl3(PO4)(SO4)(OH)6 |
| 8.BL.05 | Kemmlitzite | SrAl3(AsO4)(SO4)(OH)6 |
| 8.BL.05 | Svanbergite | SrAl3(PO4)(SO4)(OH)6 |
| 8.BL.05 | Weilerite | BaAl3(AsO4)(SO4)(OH)6 |
| 8.BL.05 | Woodhouseite | CaAl3(PO4)(SO4)(OH)6 |
| 8.BL.05 | Gallobeudantite | PbGa3(AsO4)(SO4)(OH)6 |
| 8.BL.05 | UM2011-07-POSO:AlBaH | BaAl3(PO4)(SO4)(OH)6 |
| 8.BL.10 | Arsenogoyazite | SrAl3(AsO4)(AsO3OH)(OH)6 |
| 8.BL.10 | Arsenogorceixite | BaAl3(AsO4)(AsO3OH)(OH)6 |
| 8.BL.10 | Arsenocrandallite | CaAl3(AsO4)(AsO3OH)(OH)6 |
| 8.BL.10 | Benauite | SrFe3+3(PO4)(PO3OH)(OH)6 |
| 8.BL.10 | Crandallite | CaAl3(PO4)(PO3OH)(OH)6 |
| 8.BL.10 | Dussertite | BaFe3+3(AsO4)(AsO3OH)(OH)6 |
| 8.BL.10 | Eylettersite | Th0.75Al3(PO4)2(OH)6 |
| 8.BL.10 | Gorceixite | BaAl3(PO4)(PO3OH)(OH)6 |
| 8.BL.10 | Goyazite | SrAl3(PO4)(PO3OH)(OH)6 |
| 8.BL.10 | Kintoreite | PbFe3(PO4)(PO3OH)(OH)6 |
| 8.BL.10 | Philipsbornite | PbAl3(AsO4)(AsO3OH)(OH)6 |
| 8.BL.10 | Plumbogummite | PbAl3(PO4)(PO3OH)(OH)6 |
| 8.BL.10 va | Viséite | |
| 8.BL.10 | Springcreekite | BaV3+3(PO4)2(OH,H2O)6 |
| 8.BL.10 | Galloplumbogummite | Pb(Ga,Al,Ge)3(PO4)2(OH)6 |
| 8.BL.13 | Arsenoflorencite-(La) | LaAl3(AsO4)2(OH)6 |
| 8.BL.13 | Arsenoflorencite-(Nd) | NdAl3(AsO4)2(OH)6 |
| 8.BL.13 | Arsenoflorencite-(Ce) | CeAl3(AsO4)2(OH)6 |
| 8.BL.13 | Florencite-(Ce) | CeAl3(PO4)2(OH)6 |
| 8.BL.13 | Florencite-(La) | LaAl3(PO4)2(OH)6 |
| 8.BL.13 | Florencite-(Nd) | NdAl3(PO4)2(OH)6 |
| 8.BL.13 | Waylandite | BiAl3(PO4)2(OH)6 |
| 8.BL.13 | Zaïrite | BiFe3+3(PO4)2(OH)6 |
| 8.BL.13 | Arsenowaylandite | BiAl3(AsO4)2(OH)6 |
| 8.BL.13 | Graulichite-(Ce) | CeFe3+3(AsO4)2(OH)6 |
| 8.BL.13 | Florencite-(Sm) | SmAl3(PO4)2(OH)6 |
| 8.BL.13 | Unnamed (As-analogue of Zaïrite) | (Bi,Pb)Fe3+3(AsO4)2(OH)6 |
| 8.BL.15 | Viitaniemiite | Na(Ca,Mn2+)Al(PO4)(F,OH)3 |
| 8.BL.25 | Pattersonite | PbFe3+3(PO4)2(OH)5 · H2O |
Fluorescence of Segnitite
Not fluorescent.
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Segnitite
mindat.org URL:
https://www.mindat.org/min-3606.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
Mineral Dealers:
References for Segnitite
Localities for Segnitite
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and 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).
All localities listed without proper references should be considered as questionable.
Australia | |
| Ashley et al. (1999) |
| Rankin et al. (2002) |
| John Haupt collection | |
| Leverett et al. (2003) |
| Birch et al. (1992) +1 other reference |
| |
| Parbhakar-Fox (2016) |
| Parbhakar-Fox (2016) | |
| Kolitsch et al. (1999) |
| Bottrill (2018) |
| R Bottrill collection |
| Museum Victoria collection |
| Mineralogical Society of America - ... |
Austria | |
| Auer (2023) |
| C.Auer (2024) |
| Carinthia II (2017) |
| Kolitsch (2015) |
| Kolitsch et al. (2010) |
| Kolitsch et al. (2019) |
| Kutil (2004) |
| Bernhard (2012) |
| Tomazic (1999) |
| Bojar (2004) |
| C.Auer (2016) |
| Auer (2016) | |
Brazil | |
| Márcia Abrahão Moura (2007) +1 other reference |
Bulgaria | |
| Petrov et al. (xxxx) |
Canada | |
| Norman Wilson collection |
Chile | |
| Dr. Robert A. Jenkins collection |
| Samples analysed by Dr. Jochen Schlüter (Hamburg University) |
| Samples analysed by Dr. Jochen Schluter et al. (Salzburg Department of Mineralogy) |
Czech Republic | |
| C.Auer (2016) |
| Sejkora et al. (2011) |
| Sejkora et al. (2011) |
| Rojík (2006) |
| Dolníček (2018) |
| C.Auer (2016) |
| VÍŠKOVÁ et al. (2022) |
Europe | |
| Jansa et al. (Č) +4 other references |
France | |
| SEM-EDS analysed by Chollet Pascal at ... |
| Uwe Kolitsch (SXRD + SEM-EDS) |
| Cuchet et al. (2000) | |
| Jean-Luc Portes Collection |
| Chollet Pascal Collection +1 other reference |
| Y. Vessely collection |
| SEM-EDS analysed at Laboratoire "Magmas ... |
| Boisson J.-M. et al. (2023) +1 other reference |
| Wittern et al. (Cologne) |
| Mines |
| Georges FAVREAU collection + EDX ... +1 other reference |
| Favreau et al. (2010) |
| Georges FAVREAU collection & EDX ... |
Germany | |
| Walenta (1992) |
| Walenta (1992) |
| Walenta (1992) |
| Walenta (1992) |
| Walenta (1992) |
| Gruber (2000) | |
| Walenta (1992) |
| Walenta (1992) |
| Walenta (1992) | |
| Walenta (1992) |
| Lapis 21 (12) |
| www.mineralienatlas.de (2021) |
| Wittern (1995) |
| Walenta (1992) |
| [Wittern (1995) |
| Walenta (1992) |
| WALENTA (1994) |
| Wittern (2001) |
| Walenta (1992) |
| Lapis 21 (12) |
| Wittern (2001) |
| Walenta (1992) |
| Walenta (1992) |
| Walenta (1992) | |
| Walenta (1992) |
| Belendorff (2021) |
| Bischoff (1999) |
| J. Gröbner: Neufunde aus den Bergbaurevieren St. Andreasberg et al. (2007) |
| Gröbner et al. (2011) |
| Henrich et al. (2019) |
| Rolf Golze +3 other references |
| Johannes Markus Henrich +2 other references |
| Lapis 38 (5) +1 other reference |
| Lapis (4) |
| Wittern (2001) | |
Greece | |
| Blaß et al. (1998) |
| Chollet Pascal | |
| Branko Rieck collection | |
| |
| Rieck (1999) | |
| Branko Rieck collection | |
| |
| Branko Rieck and Uwe Kolitsch ... |
| |
| Blaß et al. (1998) |
| Lapis et al. (1999) | |
Hungary | |
| Acta Min. Petro. (Szeged) |
| collection: Herman Ottó Museum |
| Szakáll-Gatter-Szendrei: Mineral ... |
| |
| Szakáll-Gatter-Szendrei: Mineral ... |
| Szakáll: Minerals of Szár Hill |
| AMP |
| Szakáll et al. (1996) |
| HOM Collection | |
Italy | |
| Bortolozzi et al. (2018) |
| Bortolozzi et al. (2015) |
| C. Balestra - SIUK-AMI - characterized ... |
| Vergani et al. (2020) |
| Carmagnola et al. (2019) |
| Vergani et al. (2020) |
| Vergani et al. (2020) | |
| Gentile et al. (2012) |
| Gentile et al. (2023) |
| Gentile et al. (2023) |
| Giuseppe Finello collection |
| Giuseppe Finello find & collection (SEM- EDS) | |
| Piccoli et al. (2007) |
| SEM/EDS 18/09/2001 MNHN-Paris |
| ALBERTINI C. (2014) |
| Cuchet et al. (2019) |
| Identificata da Italo Campostrini ... |
| Ferretti et al. (2017) |
| "Dario Cericola (SEM/EDX) |
| Bortolozzi et al. (2021) |
| Rocchetti I. (2012) |
| Bortolozzi et al. (2013) |
| Paolo Gasparetto et al. (2014) |
| Fabio Tosato +3 other references |
Japan | |
| Matsubara & Matsuyama (1997) |
| Yamada (2005) |
| Shibata et al (1998) |
Mexico | |
| Moore et al. (2003) |
Namibia | |
| Schnaitmann et al. (2007) |
| Collection of NHM +1 other reference |
| Gebhard (1999) +1 other reference |
Norway | |
| Husdal (2019) |
| Husdal et al. (2019) |
Poland | |
| Gołębiowska B. (Al,Fe3+) |
| Siuda et al. (2003) |
Portugal | |
| Marques de Sá et al. (2010) |
| Pedro Alves collection and analytical ... |
| Pedro Alves collection and analytical ... |
| Pedro Alves collection and analytical ... |
| Pedro Alves analytical data |
| Pedro Alves analytical data and technical report (confidential) |
| |
| Alves (n.d.) |
| Leal Gomes | |
| Nuno Afonso collection (XRD-analysed) |
| Pedro Alves collection. Characterized ... |
| Alves (n.d.) +1 other reference |
| Ko Jansen collection |
Russia | |
| Pekov et al. (2016) |
Slovakia | |
| Vlasáč et al. (2021) |
| Martin Števko-unpublished |
| Radková P. et al. (2019) |
Spain | |
| Georges FAVREAU collection + EDX ... |
| José Miguel Sola. DRX Uni. Of Granada (Spain) |
| Calvo (2015) |
| Calvo (2015) | |
| Miguel Calvo Rebollar (2015) |
| MineralUp (Revista de Minerales) +1 other reference |
| Rewitzer et al. (2018) |
| J. Gröbner und B. Sainz de Barranda (1999) |
| Calvo Sevillano et al. (2012) |
| Abella i Creus (2018) |
| Joan Abella i Creus specimen |
| Sainz de Baranda Graf et al. (2023) |
| Calvo Sevillano et al. (2012) +1 other reference |
| Calvo Sevillano et al. (2012) |
Switzerland | |
| |
| Ansermet (2012) |
| EDXS analyses et al. (no sulfate, Fe>>Al) | |
Thailand | |
| Hercule Shen |
| Marco P. Sacchi (2017) +1 other reference |
UK | |
| Paul De Bondt collection |
| Golley et al. (1995) |
| - (2006) |
| Green et al. (2008) |
| Cotterell et al. (2011) |
USA | |
| Ron Layton Collection |
| Ream (2005) |
| Mills et al. (2010) +1 other reference |
| Marco Ciriotti collection (analysed by SEM-EDS, 2005) |
| Tony Nikischer |
| Rocks & Minerals (2010) |
| Anthony Kampf |
| King et al. (1995) |
Quick NavTopAbout SegnititeUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Chemical AnalysisCrystallography X-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesRelationshipsCommon AssociatesStrunz-MindatFluorescence Other InformationInternet Links References Localities Locality List
Kintore opencut, Broken Hill South Mine, Broken Hill, Broken Hill district, Yancowinna Co., New South Wales, Australia