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Strengite

Pictures (235 Images total)

Strengit
Views (Image: 1563550771): 2565, Rating: 10
Strengit

Strengit xx als "Schleiferl" auf Beraunit? von Hagendorf, Grube Cornelia BB: 1 mm

Collection: Dieter Strangfeld
Copyright: Dieter Strangfeld
Contribution: Dieter Strangfeld 2019-07-19
Locality: Hagendorf-Süd (Grube Cornelia) / Hagendorf / Waidhaus / Neustadt an der Waldnaab, Landkreis / Oberpfalz, Bezirk / Bayern / Deutschland
Strengit
Views (Image: 1525205606): 2381, Rating: 9.67
Strengit

Grube Rotläufchen/Waldgirmes. Bildbreite 2,6 mm

Copyright: Lithos
Contribution: Lithos 2018-05-01
Locality: Grube Rotläufchen / Waldgirmes / Lahnau / Lahn-Dill-Kreis / Gießen, Bezirk / Hessen / Deutschland
Saléeit mit Strengit
Views (Image: 1418640671): 3909, Rating: 9.71
Saléeit mit Strengit

Größe des Saléeits: 1,8 mm; Fundort: Sapucaia Mine, Sapucaia do Norte, Galiléia, Docetal, Minas Gerais, Brasilien

Copyright: Matteo Chinellato
Contribution: Hg 2014-12-15
Locality: Sapucaia Mine / Sapucaia do Norte / Galiléia / Doce-Tal / Minas Gerais / Südosten (Região Sudeste) / Brasilien
Strengit
Views (Image: 1402839190): 927
Strengit

Bildbreite: 4 mm; Fundort: Hagendorf-Süd, Oberpfalz, Bayern, Deutschland

Copyright: Stephan Wolfsried
Contribution: Hg 2014-06-15
Locality: Hagendorf-Süd (Grube Cornelia) / Hagendorf / Waidhaus / Neustadt an der Waldnaab, Landkreis / Oberpfalz, Bezirk / Bayern / Deutschland
Strengit
Views (Image: 1402839432): 1016
Strengit

Bildbreite: 3 mm; Fundort: Indian Mountain, Cherokee Co., Kansas, USA

Copyright: Stephan Wolfsried
Contribution: Hg 2014-06-15
Locality: Indian Mountain / Cherokee Co. / Kansas / USA
Strengit
Views (Image: 1615748641): 168
Strengit

Hagendorf Süd BB.1mm Strengit (isometrisch)

Collection: Andreas W.
Copyright: Ferdl
Contribution: Ferdl 2021-03-14
Locality: Hagendorf-Süd (Grube Cornelia) / Hagendorf / Waidhaus / Neustadt an der Waldnaab, Landkreis / Oberpfalz, Bezirk / Bayern / Deutschland

Collectors Summary

Color farblos, weiß, gelb, rosa, violett, durchscheinend
Streak color weiß
Lustre Glasglanz
Hardness (Mohs) 3 - 4
Solubility +++ Säuren
Crystal System orthorhombisch, Pbca
Morphology tafelige Kristalle, radialstrahlige Aggregate, Krusten

Chemism

Chem­ical formula

Fe3+PO4·2H2O

Chem­ical com­po­si­tion

Eisen, Phosphor, Sauerstoff, Wasserstoff

Unit weight: 186.8473292 u; Number of atoms in the formula: 12

Info

Empirical formula:

FePO4·2H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

2.16

4

33.33

1.0079470

4.0317880

Oxygen

O

51.38

6

50.00

15.9994300

95.9965800

Phosphorus

P

16.58

1

8.33

30.9737612

30.9737612

Iron

Fe

29.89

1

8.33

55.8452000

55.8452000

Anal­y­sis wt%

Fe2O3 : 38.40, Mn2O3 : 4.12, P2O5 : 37.60, H2O : 19.90 (Ref: Schweizerische Mineralogische und Petrographische

Mitteilungen 82)

Strunz 9th edi­tion incl. updates

8.CD.10

8: Phosphate, Arsenate, Vanadate
C: Phosphate ohne weitere Anionen, mit H2O
D: Mit ausschließlich mittelgroßen Kationen, RO4:H2O = 1:2
10:Variscit-Gruppe

Lapis Clas­sifica­tion

VII/C.09-060

VII: PHOSPHATE, ARSENATE UND VANADATE ("Phosphate" des Registers immer einschließlich isotyper Arsenate und Vanadate!)
C: Wasserhaltige Phosphate, ohne fremde Anionen
9: Kleine und mittelgroße Kationen: Be und Al-Mn-Fe-Cu-Zn-Mg

Clas­sifica­tion by Hölzel

8.CC.150

8: PHOSPHATES ARSENATES VANADATES
C: Phosphates (-Anions +Water)
C: Valency: 3,4 C medium
1: XO4/H2O=1/1,2, mostly orthorhombic Variscite-Group

Dana 8th edi­tion

40.04.01.02

40: Hydrated Phosphates, etc
04: Hydrated Phosphates, etc where A+++ XO4 · x(H2O)
01: Variscite Group

IMA sta­tus

Erstbeschreibung vor CNMNC-Gründung (1959), als Mineral meist anerkannt

Min­eral sta­tus

anerkanntes Mineral

IMA Classification

IMA Clas­sifica­tion

Variscite group

Optical Properties

Color

farblos, weiß, gelb, rosa, violett, durchscheinend

Streak color

weiß

Diaphane­ity (Trans­parency)

teilweise transparent bis teilweise durchscheinend

Lus­tre

Glasglanz

max. Birefrin­gence

0.034

Birefringence chart\! Strengite title=Birefringence chart Strengite

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

1.707

RI value β

1.719

RI value γ / ε

1.741

Ri mean

1.722

2V angle

Biaxial (+) 75°

Optical Data Luminescence

Lumi­nes­cence

keine Fluoreszenz bekannt

Crystallography

Crystal Sys­tem

orthorhombisch

Class (H-M)

mmm

Space Group number

61

Space Group

Pbca

Cell param­e­ters a (Å)

10.08

Cell param­e­ters b (Å)

9.87

Cell param­e­ters c (Å)

8.67

Cell param­e­ters a/b or c/a

1.021

Cell param­e­ters c/b

0.878

Cell param­e­ters α

90°

Cell param­e­ters β

90°

Cell param­e­ters γ

90°

Z

8

Volumne (ų)

862.575

X-Ray Pow­der Diffrac­tion

5.54(90),
4.98(70),
4.40(100),
4.01(50),
3.33(40),
3.13(60),
2.79(60),
2.55(70)

XRD chart Strengite

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

Morphol­ogy

tafelige Kristalle, radialstrahlige Aggregate, Krusten

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

3 - 4

VHN (Hard­ness Vick­ers)

190 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.87

2.877 ( ρ calc. Mineralienatlas )

Insta­bil­ity

+++ Säuren

Preface

Occurrences

in phosphorhaltigen Brauneisenlagerstätten, in Phosphatpegmatiten

Author (Name, Year)

Nies, 1877

References

Crystal Research and Technology 39 (2004), 1080

Wilke, Harry (1959): "Phosphosiderit und Strengit von Pleystein in Ostbayern." Acta Albertina Ratisbonensia 23(2): 107-170

IMA group assignments

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

Scorodite

Fe3+AsO4·2H2O

orthorhombisch : mmm : Pcab

8.CD.10

Strengite

Fe3+PO4·2H2O

orthorhombisch : mmm : Pbca

8.CD.10

Variscite

AlPO4·2H2O

orthorhombisch : mmm : Pbca

8.CD.10

Yanomamite

In[AsO4]·2H2O

orthorhombisch : mmm : Pbca

8.CD.10

Bonacinaite

Sc(AsO4)·2H2O

monoklin : 2/m : P21/n

8.CD.10

Mansfieldite

AlAsO4·2H2O

orthorhombisch : mmm : Pcab

8.CD.10

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

Metavariscite

AlPO4·2H2O

monoklin : 2/m : P21/n

VII/C.09-010

Phosphosiderite

Fe3+PO4·2H2O

monoklin : 2/m : P21/n

VII/C.09-020

Kolbeckite

(Sc,Al)[PO4]·2H2O

monoklin : 2/m : P21/n

VII/C.09-030

Variscite

AlPO4·2H2O

orthorhombisch : mmm : Pbca

VII/C.09-050

Strengite

Fe3+PO4·2H2O

orthorhombisch : mmm : Pbca

VII/C.09-060

Mansfieldite

AlAsO4·2H2O

orthorhombisch : mmm : Pcab

VII/C.09-070

Scorodite

Fe3+AsO4·2H2O

orthorhombisch : mmm : Pcab

VII/C.09-080

Yanomamite

In[AsO4]·2H2O

orthorhombisch : mmm : Pbca

VII/C.09-085

Parascorodite

Fe3+AsO4·2H2O

VII/C.09-088

Koninckite

Fe3+PO4·3H2O

VII/C.09-090

Zigrasite

MgZr(PO4)2·4H2O

triklin : 1 : P1

VII/C.09-100

Malhmoodite

Fe2+Zr(PO4)2·4H2O

VII/C.09-110

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

Schubnelite

Fe2-x3+(V5+,V4+)2O4(OH)4

triklin : 1 : P1

8.CC.130

Variscite

AlPO4·2H2O

orthorhombisch : mmm : Pbca

8.CC.140

Strengite

Fe3+PO4·2H2O

orthorhombisch : mmm : Pbca

8.CC.150

Mansfieldite

AlAsO4·2H2O

orthorhombisch : mmm : Pcab

8.CC.170

Scorodite

Fe3+AsO4·2H2O

orthorhombisch : mmm : Pcab

8.CC.180

Parascorodite

Fe3+AsO4·2H2O

8.CC.185

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

Strengite

Fe3+PO4·2H2O

orthorhombisch : mmm : Pbca

40.04.01.02

Scorodite

Fe3+AsO4·2H2O

orthorhombisch : mmm : Pcab

40.04.01.03

Mansfieldite

AlAsO4·2H2O

orthorhombisch : mmm : Pcab

40.04.01.04

Yanomamite

In[AsO4]·2H2O

orthorhombisch : mmm : Pbca

40.04.01.05

Koninckite

Fe3+PO4·3H2O

40.04.02.01

Metavariscite

AlPO4·2H2O

monoklin : 2/m : P21/n

40.04.03.01

Phosphosiderite

Fe3+PO4·2H2O

monoklin : 2/m : P21/n

40.04.03.02

Kolbeckite

(Sc,Al)[PO4]·2H2O

monoklin : 2/m : P21/n

40.04.03.03

Kaňkite

Fe3+AsO4·3.5H2O

40.04.04.01

Steigerite

AlVO4·3H2O

monoklin : 2, 2/m : P21, P21/m

40.04.05.01

Churchite-(Y)

(Y,Er,La)[PO4]·2H2O

monoklin : 2/m : I2/a

40.04.06.01

'Churchite-(Nd)'

Nd(PO4)·2H2O

monoklin : 2/m : C2/c

40.04.06.02

Rhabdophane-(Ce)

Ce(PO4)·H2O

hexagonal : 622 : P6222

40.04.07.01

Rhabdophane-(La)

La(PO4)·H2O

hexagonal : 622 : P6222

40.04.07.02

Rhabdophane-(Nd)

Nd(PO4)·H2O

hexagonal : 622 : P6222

40.04.07.03

Grayite

(Th,Pb,Ca)PO4·H2O

hexagonal : 622 : P6222

40.04.07.04

Brockite

(Ca,Th,Ce)(PO4)·H2O

hexagonal : 622 : P6222

40.04.07.05

Tristramite

(Ca,U4+,Fe3+)(PO4,SO4)·2H2O

hexagonal : 622 : P6222

40.04.07.06

Ningyoite

(U,Ca,Ce)2(PO4)2·1-2H2O

orthorhombisch : 222 : P222

40.04.08.01

Lermontovite

U4+(PO4)(OH)·H2O

orthorhombisch : mmm : Ccca

40.04.08.02

Vyacheslavite

U4+(PO4)(OH)·2.5H2O

40.04.08.03

Parascorodite

Fe3+AsO4·2H2O

40.04.09.01

Alternative Name

German

Barrandit

Spanish

Barrandita

English

Barrandite

CNMNC symbol

Symbol

Stg

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

German pages

DeWikiPedia - search for: Strengit
Google-Bilder-Suche - search for: Strengit
Mineralogisch-Petrographisches-Institut Hamburg - search for: Strengit

English pages

Mindat - search for: Strengite
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Handbook-of-Mineralogy - search for: Strengite
RRUFF - Raman, XRD and other mineral data - search for: Strengite
RRUFF - References and PDF downloads - search for: Strengite
American-Mineralogist-Crystal-Structure-Database - search for: Strengite
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Russian pages

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German pages

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Locations with GPS information