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Segnitite

Pictures (34 Images total)

Segnitit
Views (Image: 1225451937): 3349, Rating: 8.67
Segnitit

Bildbreite: 2 mm; Fundort: Alto das Quelhas do Gestoso Minen, Gestoso, Manhouce, São Pedro do Sul, Distrikt Viseu, Portugal

Copyright: Christian Rewitzer
Contribution: Hg 2008-10-31
Locality: Alto das Quelhas do Gestoso Minen / Gestoso / Manhouce / São Pedro do Sul / Viseu, Distrikt / Portugal
Segnitit mit Lepidokrokit
Views (Image: 1225873724): 3713, Rating: 8.89
Segnitit mit Lepidokrokit

Bildbreite: 1 mm; Fundort: Alto das Quelhas do Gestoso Minen, Gestoso, Manhouce, São Pedro do Sul, Distrikt Viseu, Portugal

Copyright: Christian Rewitzer
Contribution: Hg 2008-11-05
Locality: Alto das Quelhas do Gestoso Minen / Gestoso / Manhouce / São Pedro do Sul / Viseu, Distrikt / Portugal
Segnitit
Views (Image: 1582311495): 548
Segnitit

BB: ca 3,3 mm; Segnitit Rosetten auf und in Quarz, Grube Clara, Oberwolfach, Schwarzwald

Collection: Harald Biecker
Copyright: Harald Biecker
Contribution: Harald Biecker 2020-02-21
Locality: Grube Clara / Oberwolfach / Ortenaukreis / Freiburg, Bezirk / Baden-Württemberg / Deutschland
Segnitit
Views (Image: 1588963734): 388
Segnitit

FO: Grube Clara / Oberwolfach; BB 1 mm

Copyright: Halden-Joerg
Contribution: Halden-Joerg 2020-05-08
Locality: Grube Clara / Oberwolfach / Ortenaukreis / Freiburg, Bezirk / Baden-Württemberg / Deutschland
Segnitit
Views (Image: 1598971022): 250
Segnitit

Bildbreite 0,5 mm; Gefunden 04.07.2020

Collection: Hartmut Stöckle
Copyright: Hartmut Stöckle
Contribution: Hartmut Stöckle 2020-09-01
Locality: Grube Clara / Oberwolfach / Ortenaukreis / Freiburg, Bezirk / Baden-Württemberg / Deutschland
Segnitit
Views (Image: 1598973003): 220
Segnitit

Bildbreite 1,0 mm; Gefunden 04.07.2020

Collection: Hartmut Stöckle
Copyright: Hartmut Stöckle
Contribution: Hartmut Stöckle 2020-09-01
Locality: Grube Clara / Oberwolfach / Ortenaukreis / Freiburg, Bezirk / Baden-Württemberg / Deutschland

Collectors Summary

Color gelbgrün
Hardness (Mohs) 4.00 - 5.00
Cleavages gut {001}
Fracture rauh
Solubility +++ HNO3, heiße Säuren
Crystal System trigonal, R3m

Chemism

Chem­ical formula

PbFe33+H(AsO4)2(OH)6

Chem­ical com­po­si­tion

Arsen, Blei, Eisen, Sauerstoff, Wasserstoff

Unit weight: 755.636453 u; Number of atoms in the formula: 27

Info

Empirical formula:

PbFe3H(AsO4)2(OH)6

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.93

7

25.93

1.0079470

7.0556290

Oxygen

O

29.64

14

51.85

15.9994300

223.9920200

Iron

Fe

22.17

3

11.11

55.8452000

167.5356000

Arsenic

As

19.83

2

7.41

74.9216020

149.8432040

Lead

Pb

27.42

1

3.70

207.2100000

207.2100000

Anal­y­sis wt%

ZnO : 1.87, BaO : 0.49, PbO : 30.58, Al2O3 : 1.13, Fe2O3 : 28.91, As2O5 : 27.89, SO3 : 0.57, H2O : 8.01 (Ref: American Mineralogist 92)

Strunz 9th edi­tion incl. updates

8.BL.10

8: Phosphate, Arsenate, Vanadate
B: Phosphate, etc., mit weitere Anionen, ohne H2O
L: Mit mittelgroßen und großen [Kationen] (OH, etc.):RO4 = 3:1
10:Crandallit-Gruppe

Lapis Clas­sifica­tion

VII/B.36-165

VII: PHOSPHATE, ARSENATE UND VANADATE ("Phosphate" des Registers immer einschließlich isotyper Arsenate und Vanadate!)
B: Wasserfreie Phosphate, mit fremden Anionen F,Cl,O,OH
36: Mittelgroße und große Kationen: Mg-Cu-Zn und Ca-Na-K-Ba-Pb; Crandallit-Gruppe

Clas­sifica­tion by Hölzel

8.BK.250

8: PHOSPHATES ARSENATES VANADATES
B: Phosphates (+Anions -Water)
K: Phosphatian (+AsO4) Alunites, trigonal, very large: 1,2,3,4, Vmed: 3
2: With Pb Plumbogummite-Group

Dana 8th edi­tion

42.07.04.04

42: Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
07: Hydrated Phosphates, etc., Containing Hydroxyl or Halogen where (AB)5 (XO4)3 Zq · x(H2O)
04: Arsenocrandallite Group

IMA sta­tus

Anerkannt von der CNMNC

Min­eral sta­tus

anerkanntes Mineral

IMA Classification

IMA Clas­sifica­tion

Alunite supergroup  ⇒ Dussertite group with 1c

Optical Properties

Color

gelbgrün

max. Birefrin­gence

0.020

Birefringence chart\! Segnitite title=Birefringence chart Segnitite

Michel-Levy Color Chart viewed according to the maximum birefringence (at 30μm). Mineral color is not taken into account. Click on the image to enlarge or change thickness.

RI value α / ω / n

1.955

RI value γ / ε

1.975

Ri mean

1.962

2V angle

Uniaxial (+)

Crystallography

Crystal Sys­tem

trigonal

Class (H-M)

3m

Space Group number

166

Space Group

R3m

Cell param­e­ters a (Å)

7.359

Cell param­e­ters b (Å)

-

Cell param­e­ters c (Å)

17.113

Cell param­e­ters a/b or c/a

2.325

Cell param­e­ters c/b

-

Z

3

Volumne (ų)

802.591

X-Ray Pow­der Diffrac­tion

5.966(50),
3.678(40),
3.092(100),
2.849(20),
2.283(30),
2.254(10),
1.992(30),
1.840(20)

XRD chart Segnitite

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Crystals 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

4.00 - 5.00

VHN (Hard­ness Vick­ers)

190 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

4.77 (berechnet)

4.69 ( ρ calc. Mineralienatlas )

Cleav­ages

gut {001}

Frac­ture

rauh

Tenac­ity

spröde

Insta­bil­ity

+++ HNO3, heiße Säuren

Preface

Author (Name, Year)

Birch & Pring & Gatehouse, 1992

Addi­tional Informa­tion

Anmerkung zu Raman-Analysen

Die Raman-Spektren von Beudantit und Segnitit sind bis auf die Sulfat-Bande weitgehend ähnlich. Aktuell (04.01.2019) gibt es deutliche Indizien dafür, dass das Spektrum von R060342 (bezeichnet "Segnitite", Kintore Opencut/Australia, identity "not yet confirmed.") des RRUFF Projekts nicht von Segnitit stammt , vgl. Diskussion im Forum. Für ein Raman-Referenzspektrum von Segnitit sollte deshalb auf eine andere Quelle ausgewichen werden.- Lynx

References

American Mineralogist 77 (1992), 656

IMA group assignments

Related minerals "Strunz Classification" (9. Edition) [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

'Viseite'

CaAl3(PO4,SiO4)2(OH)n·36H2O

8.BL.10

Benauite

(Sr,Ba)Fe33+[(OH,H2O)6|(PO4,SO4)2]

trigonal : 3m : R3m

8.BL.10

Goyazite

SrAl3(PO4)(PO3OH)(OH)6

trigonal : 3m : R3m

8.BL.10

Segnitite

PbFe33+H(AsO4)2(OH)6

trigonal : 3m : R3m

8.BL.10

Dussertite

BaFe33+(AsO4)2(OH)5

trigonal : 3m : R3m

8.BL.10

Gorceixite

BaAl3(PO4)(PO3OH)(OH)6

monoklin : m : Cm

8.BL.10

Kintoreite

PbFe33+[(OH,H2O)6|(PO4,AsO4,SO4)2]

trigonal : 3m : R3m

8.BL.10

Crandallite

CaAl3(PO4)(PO3OH)(OH)6

trigonal : 3m : R3m

8.BL.10

Galloplumbogummite

Pb(Ga,Al,Ge)3(PO4)2(OH)6

trigonal : 3m : R3m

8.BL.10

Plumbogummite

PbAl3(PO4)2(OH)5·H2O

trigonal : 3m : R3m

8.BL.10

Arsenogoyazite

(Sr,Ca,Ba)Al3(AsO4)(AsO3OH)(OH)6

trigonal : 3m, 3m : R3m, R3m

8.BL.10

Philipsbornite

PbAl3(AsO4)2(OH)5·H2O

trigonal : 3m : R3m

8.BL.10

Springcreekite

BaV3+3(PO4)(PO3OH)(OH)6

trigonal : 3m : R3m

8.BL.10

Arsenogorceixite

BaAl3[(OH,F)6|AsO3(OH)|(AsO4,PO4)]

trigonal : 3m : R3m

8.BL.10

'Arsenowaylandite'

Bi3+Al3[(OH)6|(AsO4,PO4)2]

8.BL.10

Arsenocrandallite

(Ca,Sr)Al3[(As,P)O4]2(OH)5·H2O

trigonal : 3m : R3m

8.BL.10

Related minerals "Lapis Classification" [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Crandallite

CaAl3(PO4)(PO3OH)(OH)6

trigonal : 3m : R3m

VII/B.36-010

Arsenocrandallite

(Ca,Sr)Al3[(As,P)O4]2(OH)5·H2O

trigonal : 3m : R3m

VII/B.36-020

Goyazite

SrAl3(PO4)(PO3OH)(OH)6

trigonal : 3m : R3m

VII/B.36-030

Arsenogoyazite

(Sr,Ca,Ba)Al3(AsO4)(AsO3OH)(OH)6

trigonal : 3m, 3m : R3m, R3m

VII/B.36-040

Gorceixite

BaAl3(PO4)(PO3OH)(OH)6

monoklin : m : Cm

VII/B.36-050

Arsenogorceixite

BaAl3[(OH,F)6|AsO3(OH)|(AsO4,PO4)]

trigonal : 3m : R3m

VII/B.36-060

Plumbogummite

PbAl3(PO4)2(OH)5·H2O

trigonal : 3m : R3m

VII/B.36-070

Galloplumbogummite

Pb(Ga,Al,Ge)3(PO4)2(OH)6

trigonal : 3m : R3m

VII/B.36-075

Philipsbornite

PbAl3(AsO4)2(OH)5·H2O

trigonal : 3m : R3m

VII/B.36-080

Waylandite

BiAl3(PO4)2(OH)6

trigonal : 3m : R3m

VII/B.36-090

'Arsenowaylandite'

Bi3+Al3[(OH)6|(AsO4,PO4)2]

VII/B.36-095

Eylettersite

(Th,Pb)1-xAl3(PO4,SiO4)2(OH)6

trigonal : 3m : R3m

VII/B.36-100

Florencite-(La)

(La,Ce)Al3(PO4)2(OH)6

trigonal : 3m : R3m

VII/B.36-110

Florencite-(Ce)

CeAl3(PO4)2(OH)6

trigonal : 3m : R3m

VII/B.36-115

Florencite-(Nd)

(Nd,Ce)Al3(PO4)2(OH)6

trigonal : 3m : R3m

VII/B.36-120

Florencite-(Sm)

(Sm,Nd)Al3(PO4)2(OH)6

trigonal : 3m : R3m

VII/B.36-122

Arsenoflorencite-(La)

LaAl3(AsO4)2(OH)6

trigonal : 3m : R3m

VII/B.36-125

Arsenoflorencite-(Ce)

(Ce,La)Al3(AsO4)2(OH)6

trigonal : 3m : R3m

VII/B.36-130

'Arsenoflorencite-(Nd)'

(Nd,La,Ce,Ba)(Al3,Fe3+)[(OH)6|(AsO4,PO4)2]

VII/B.36-135

Graulichite-(Ce)

CeFe3+3(AsO4)2(OH)6

trigonal : 3m : R3m

VII/B.36-140

Benauite

(Sr,Ba)Fe33+[(OH,H2O)6|(PO4,SO4)2]

trigonal : 3m : R3m

VII/B.36-150

Springcreekite

BaV3+3(PO4)(PO3OH)(OH)6

trigonal : 3m : R3m

VII/B.36-155

Dussertite

BaFe33+(AsO4)2(OH)5

trigonal : 3m : R3m

VII/B.36-160

Kintoreite

PbFe33+[(OH,H2O)6|(PO4,AsO4,SO4)2]

trigonal : 3m : R3m

VII/B.36-163

Pattersonite

PbFe3(PO4)2(OH)4(H2O,OH)2

triklin : 1 : P1

VII/B.36-164

Segnitite

PbFe33+H(AsO4)2(OH)6

trigonal : 3m : R3m

VII/B.36-165

Kolitschite

Pb[Zn0.25,☐0.75]Fe3H(AsO4)2(OH)6 - Pb[Zn0.5,☐0.5]Fe3(AsO4)2(OH)6

monoklin : 2/m : C2/c

VII/B.36-167

Zaïrite

Bi(Fe3+,Al)3(PO4)2(OH)6

trigonal : 3m : R3m

VII/B.36-170

Related minerals "Hoelzel Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Plumbogummite

PbAl3(PO4)2(OH)5·H2O

trigonal : 3m : R3m

8.BK.200

Galloplumbogummite

Pb(Ga,Al,Ge)3(PO4)2(OH)6

trigonal : 3m : R3m

8.BK.203

Kintoreite

PbFe33+[(OH,H2O)6|(PO4,AsO4,SO4)2]

trigonal : 3m : R3m

8.BK.210

Pattersonite

PbFe3(PO4)2(OH)4(H2O,OH)2

triklin : 1 : P1

8.BK.215

Philipsbornite

PbAl3(AsO4)2(OH)5·H2O

trigonal : 3m : R3m

8.BK.240

Segnitite

PbFe33+H(AsO4)2(OH)6

trigonal : 3m : R3m

8.BK.250

Kolitschite

Pb[Zn0.25,☐0.75]Fe3H(AsO4)2(OH)6 - Pb[Zn0.5,☐0.5]Fe3(AsO4)2(OH)6

monoklin : 2/m : C2/c

8.BK.270

Related minerals "Dana 8. Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Childrenite

Fe2+Al(PO4)(OH)2·H2O

orthorhombisch : mm2 : Bba2

42.07.01.01

Eosphorite

MnAl(PO4)(OH)2·H2O

monoklin, pseudo-orthorhombisch : mmm : Cmca

42.07.01.02

Ernstite

(Mn2+1-xFe3+x)Al(PO4)(OH)2-xOx

monoklin : m, 2/m : Aa, A2/a

42.07.01.03

Sinkankasite

H2MnAl(PO4)2(OH)·6H2O

triklin : 1 : P1

42.07.01.04

Foggite

CaAl(PO4)(OH)2·H2O

orthorhombisch : 222 : A2122

42.07.02.01

Krasnovite

Ba(Al,Mg)(PO4,CO3)(OH)2·H2O

orthorhombisch : mmm, mmm : Pnnn, Pnna

42.07.02.02

Crandallite

CaAl3(PO4)(PO3OH)(OH)6

trigonal : 3m : R3m

42.07.03.01

Gorceixite

BaAl3(PO4)(PO3OH)(OH)6

monoklin : m : Cm

42.07.03.02

Goyazite

SrAl3(PO4)(PO3OH)(OH)6

trigonal : 3m : R3m

42.07.03.03

Plumbogummite

PbAl3(PO4)2(OH)5·H2O

trigonal : 3m : R3m

42.07.03.05

Kintoreite

PbFe33+[(OH,H2O)6|(PO4,AsO4,SO4)2]

trigonal : 3m : R3m

42.07.03.06

Benauite

(Sr,Ba)Fe33+[(OH,H2O)6|(PO4,SO4)2]

trigonal : 3m : R3m

42.07.03.07

Springcreekite

BaV3+3(PO4)(PO3OH)(OH)6

trigonal : 3m : R3m

42.07.03.08

Arsenocrandallite

(Ca,Sr)Al3[(As,P)O4]2(OH)5·H2O

trigonal : 3m : R3m

42.07.04.01

Philipsbornite

PbAl3(AsO4)2(OH)5·H2O

trigonal : 3m : R3m

42.07.04.02

Arsenogoyazite

(Sr,Ca,Ba)Al3(AsO4)(AsO3OH)(OH)6

trigonal : 3m, 3m : R3m, R3m

42.07.04.03

Segnitite

PbFe33+H(AsO4)2(OH)6

trigonal : 3m : R3m

42.07.04.04

Nissonite

Cu2Mg2(PO4)2(OH)2·5H2O

monoklin : 2/m : C2/c

42.07.05.01

Uralolite

Ca2Be4(PO4)3(OH)3·5H2O

monoklin : 2/m : P21/n

42.07.06.01

Weinebeneite

CaBe3(PO4)2(OH)2·4H2O

monoklin : m : Cc

42.07.06.02

Zanazziite

(Ca,Mn)2(Mg,Fe)(Mg,Fe2+,Mn,Fe3+)4Be4(PO4)6(OH)4·6H2O

monoklin : 2/m : C2/c

42.07.07.03

Greifensteinite

Ca2(Fe2+,Mn2+)5Be4[(OH)4|(PO4)6]·6H2O

monoklin : 2/m : C2/c

42.07.07.04

Atencioite

Ca2Fe2+☐Mg2Fe2+2Be4(PO4)6(OH)4·6H2O

triklin : 1 : P1

42.07.07.05

Cyrilovite

NaFe33+(PO4)2(OH)4·2H2O

tetragonal : 422 : P41212

42.07.08.01

Wardite

NaAl3(PO4)2(OH)4·2H2O

tetragonal : 422, 422 : P41212, P43212

42.07.08.02

Millisite

(Na,K)CaAl6(PO4)4(OH)9·3H2O

42.07.09.01

Other languages

German

Segnitit

Spanish

Segnitita

English

Segnitite

French

Segnitite

Russian

Сегнитит

IMA Number

IMA 1991-017

Automatic Links to external internet sources (Responsibility is with the operator)

German pages

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English pages

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Russian pages

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