https://www.edelsteine-neuburg.de
https://www.mineral-bosse.de
https://www.mineraliengrosshandel.com
http://www.spessartit.de/walldorf.html
https://www.mineralbox.biz
'._('einklappen').'
 

Segelerite (Segelerit)

Collectors Summary

Color gelblichgrün
Streak color weiß
Hardness (Mohs) 4
Solubility +++ HCl
Crystal System orthorhombisch, Pbca

Chemism

Chemical formula

CaMgFe3+(PO4)2(OH)·4H2O

Chemical composition

Calcium, Eisen, Magnesium, Phosphor, Sauerstoff, Wasserstoff

Unit weight: 399.2402954 u; Number of atoms in the formula: 27

Info

Empirical formula:

CaMgFe(PO4)2(OH)·4H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

2.27

9

33.33

1.0079470

9.0715230
Oxygen

O

52.10

13

48.15

15.9994300

207.9925900
Magnesium

Mg

6.09

1

3.70

24.3050600

24.3050600
Phosphorus

P

15.52

2

7.41

30.9737612

61.9475224
Calcium

Ca

10.04

1

3.70

40.0784000

40.0784000
Iron

Fe

13.99

1

3.70

55.8452000

55.8452000

Strunz 9th edition incl. updates

8.DH.20

8: Phosphate, Arsenate, Vanadate
D: Phosphate, mit weiteren Anionen, mit H2O
H: Mit großen und mittelgroßen [Kationen], (OH, etc.):RO4 < 1:1
20:Overit-Gruppe

Lapis Classification

VII/D.28-020

VII: PHOSPHATE, ARSENATE UND VANADATE ("Phosphate" des Registers immer einschließlich isotyper Arsenate und Vanadate!)
D: Wasserhaltige Phosphate, mit fremden Anionen
28: Mittelgroße und sehr große Kationen: Al-Mg und Ca-Na-K; Overit-Gruppe

Classification by Hölzel

8.DL.120

8: PHOSPHATES ARSENATES VANADATES
D: Phosphates (+Anions +Water)
L: very large=2, very small-medium=2+3
1: Segelerite-Group

Dana 8th edition

42.11.01.02

42: Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
11: Hydrated Phosphates, etc., Containing Hydroxyl or Halogen where (AB)4 (XO4)3 Zq · x(H2O)
01: Overite Group

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

gelblichgrün

Streak color

weiß

max. Birefringence

0.032
Birefringence chart\! Segelerite title=Birefringence chart Segelerite

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

1.618

RI value β

1.635

RI value γ / ε

1.650

Ri mean

1.634

2V angle

Biaxial (-) 83°

Crystallography

Crystal System

orthorhombisch

Class (H-M)

mmm

Space Group number

61

Space Group

Pbca

Cell parameters a (Å)

14.826

Cell parameters b (Å)

18.751

Cell parameters c (Å)

7.307

Cell parameters a/b or c/a

0.791

Cell parameters c/b

0.390

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

8

Volumne (ų)

2031.363

X-Ray Powder Diffraction

9.31(90),
5.34(60),
4.97(40),
4.65(40),
3.729(50),
3.421(50),
2.868(100),
2.583(40)
XRD chart Segelerite

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

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

4

VHN (Hardness Vickers)

160 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.67 (gemessen)

2.611 ( ρ calc. Mineralienatlas )

Instability

+++ HCl

(Co-)Type locality

(Co-)Type locality

USA/South Dakota/Custer Co./Custer District/Fourmile/Tip Top Mine

Preface

Author (Name, Year)

Moore, 1974

References

American Mineralogist 59 (1974), 48

Other languages

German

Segelerit

Spanish

Segelerita

English

Segelerite

French

Segelerite

Russian

Сегелерит

Alternative Name

German

Seglerit

Spanish

Seglerita

Seglerite

CNMNC (IMA)-Number

IMA 1973-023

CNMNC symbol

Symbol

Sgl

Locations with GPS information