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Kaluginite (Kaluginit)

Collectors Summary

Color gelblichgrün, grüngelb
Streak color gelblichweiß
Hardness (Mohs) 3.5
Cleavages unvollkommen (010)
Fracture uneben
Crystal System orthorhombisch, Ccca

Chemism

Chemical formula

(Mn2+,Ca)MgFe3+[OH|(PO4)2]·4H2O

Chemical composition

Calcium, Eisen, Magnesium, Mangan, Phosphor, Sauerstoff, Wasserstoff

Unit weight: 410.385032825 u; Number of atoms in the formula: 27

Info

Empirical formula:

(Mn0.75Ca0.25)MgFe[OH(PO4)2]·4H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

2.21

9

33.33

1.0079470

9.0715230
Oxygen

O

50.68

13

48.15

15.9994300

207.9925900
Magnesium

Mg

5.92

1

3.70

24.3050600

24.3050600
Phosphorus

P

15.09

2

7.41

30.9737612

61.9475224
Calcium

Ca

2.44

0.25

0.93

40.0784000

10.0196000
Manganese

Mn

10.04

0.75

2.78

54.9380499

41.2035374
Iron

Fe

13.61

1

3.70

55.8452000

55.8452000

Strunz 9th edition incl. updates

8.DH.15

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

Lapis Classification

VII/D.03-015

VII: PHOSPHATE, ARSENATE UND VANADATE ("Phosphate" des Registers immer einschließlich isotyper Arsenate und Vanadate!)
D: Wasserhaltige Phosphate, mit fremden Anionen
3: Mittelgroße Kationen: Cu-Zn-Mn-Al-Fe

Classification by Hölzel

8.DL.145

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

IMA status

Ohne Prüfung durch die CNMNC veröffentlicht

Optical Properties

Color

gelblichgrün, grüngelb

Streak color

gelblichweiß

max. Birefringence

0.031
Birefringence chart\! Kaluginite title=Birefringence chart Kaluginite

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

1.627

RI value β

1.642

RI value γ / ε

1.658

Ri mean

1.642

2V angle

Biaxial (+)- 90°

Crystallography

Crystal System

orthorhombisch

Class (H-M)

mmm

Space Group number

68

Space Group

Ccca

Cell parameters a (Å)

15.05

Cell parameters b (Å)

37.37

Cell parameters c (Å)

7.18

Cell parameters a/b or c/a

0.403

Cell parameters c/b

0.192

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

16

Volumne (ų)

4038.165

X-Ray Powder Diffraction

9.38(100),
5.00(70),
3.52(70),
2.84(90),
2.60(80)
XRD chart Kaluginite

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

Physical Properties

Hardness (Mohs)

3.5

VHN (Hardness Vickers)

130 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.69 (gemessen)

2.7 ( ρ calc. Mineralienatlas )

Cleavages

unvollkommen (010)

Fracture

uneben

Tenacity

spröde

Preface

Author (Name, Year)

Chesnokov & Vilisov & Polakov & Bushmakin, 1989

References

Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva 120 (4) (1991), 100

Other languages

German

Kaluginit

Spanish

Kaluginita

French

Kaluginite

English

Kaluginite