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Ushkovite

Pictures (2 Images total)

Ushkovit
Views (Image: 1220285305): 968, Rating: 6
Ushkovit (SNr: A012646)

Fo.: Fazenda Pomaroli, Linopolis, Governador Valadares, Minas Gerais, Brasilien, tafelige braune XX, BB 1,9mm

Collection: Lithothek der Münchener Micromounter
Copyright: Hannes Osterhammer
Contribution: Münchener Micromounter 2008-09-01
Locality: Linópolis (Linopolis) / Laranjeiras / Galiléia / Doce-Tal / Minas Gerais / Südosten (Região Sudeste) / Brasilien
Ushkovit
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Ushkovit

Bildbreite: 1,5 mm; Fundort: Galiléia, Doce-Tal, Minas Gerais, Brasilien

Copyright: Christian Rewitzer
Contribution: Hg 2010-07-01
Locality: Galiléia / Doce-Tal / Minas Gerais / Südosten (Região Sudeste) / Brasilien

Collectors Summary

Color braun, hellgelb, orange
Streak color weiß
Hardness (Mohs) 3.5
Solubility +++ Säuren
Crystal System triklin, P1

Chemism

Chem­ical formula

MgFe23+(PO4)2(OH)2·8H2O

Chem­ical com­po­si­tion

Eisen, Magnesium, Phosphor, Sauerstoff, Wasserstoff

Unit weight: 504.0757684 u; Number of atoms in the formula: 41

Info

Empirical formula:

MgFe2(PO4)2(OH)2·8H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

3.60

18

43.90

1.0079470

18.1430460

Oxygen

O

57.13

18

43.90

15.9994300

287.9897400

Magnesium

Mg

4.82

1

2.44

24.3050600

24.3050600

Phosphorus

P

12.29

2

4.88

30.9737612

61.9475224

Iron

Fe

22.16

2

4.88

55.8452000

111.6904000

Anal­y­sis wt%

MgO : 8.79, MnO : 1.88, CaO : 2.54, Fe2O3 : 29.87, P2O5 : 30.47, H2O : 27.11 (Ref: Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva, 1904-1974 83)

Strunz 9th edi­tion incl. updates

8.DC.30

8: Phosphate, Arsenate, Vanadate
D: Phosphate, mit weiteren Anionen, mit H2O
C: Mit ausschließlich mittelgroßen [Kationen], (OH, etc.):RO4 = 1:1 und < 2:1
30:Laueit-Gruppe

Lapis Clas­sifica­tion

VII/D.10-020

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

Clas­sifica­tion by Hölzel

8.DE.430

8: PHOSPHATES ARSENATES VANADATES
D: Phosphates (+Anions +Water)
E: Phosphates, Me(2+) Me2(3+) ~[OH|XO4]2*nH2O
4: nH2O=8 Gordonite-Group

Dana 8th edi­tion

42.11.10.04

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

IMA sta­tus

Anerkannt von der CNMNC

Min­eral sta­tus

anerkanntes Mineral

IMA Classification

IMA Clas­sifica­tion

Laueite supergroup  ⇒ Laueite group

Optical Properties

Color

braun, hellgelb, orange

Streak color

weiß

Diaphane­ity (Trans­parency)

transparent

max. Birefrin­gence

0.086

Birefringence chart\! Ushkovite title=Birefringence chart Ushkovite

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

1.584

RI value β

1.637

RI value γ / ε

1.670

Ri mean

1.630

2V angle

Biaxial (-) 50°

Crystallography

Crystal Sys­tem

triklin

Class (H-M)

1

Space Group number

2

Space Group

P1

Cell param­e­ters a (Å)

5.347

Cell param­e­ters b (Å)

10.592

Cell param­e­ters c (Å)

7.225

Cell param­e­ters a/b or c/a

0.505

Cell param­e­ters c/b

0.682

Cell param­e­ters α

108.28

Cell param­e­ters β

111.73

Cell param­e­ters γ

71.63

Z

1

Volumne (ų)

351.623

X-Ray Pow­der Diffrac­tion

9.86(100),
6.57(80),
4.95(50),
4.85(50),
4.01(40),
3.28(60),
3.20(80),
3.12(40)

XRD chart Ushkovite

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)

3.5

VHN (Hard­ness Vick­ers)

253 (15g)

Density (g/cm³)

2.38

2.38 ( ρ calc. Mineralienatlas )

Insta­bil­ity

+++ Säuren

Preface

Author (Name, Year)

Chesnokov & Vilisov & Cherepivskaya & Gorskaya, 1983

References

Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva 112 (1983), 42

IMA group assignments

Other languages

German

Ushkovit

Spanish

Ushkovita

English

Ushkovite

French

Ushkovite

Russian

Ушковит

CNMNC (IMA)-Number

IMA 1982-014

CNMNC symbol

Symbol

Ukv

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

German pages

DeWikiPedia - search for: Ushkovit
Google-Bilder-Suche - search for: Ushkovit
Mineralienatlas.de (Forum) - search for: Ushkovit

English pages

Mindat - search for: Ushkovite
Webmineral - search for:Ushkovite
Handbook-of-Mineralogy - search for: Ushkovite
RRUFF - Raman, XRD and other mineral data - search for: Ushkovite
RRUFF - References and PDF downloads - search for: Ushkovite
American-Mineralogist-Crystal-Structure-Database - search for: Ushkovite
Strahlen.org - search for: Ushkovite

Russian pages

Webmineral.ru - search for: Ушковит

Mineral Dealer

German pages

hausen - Mineralgroßhandel - search for: Ushkovit
Crystal-Treasure.com - search for: Ushkovit
Bosse - search for: Ushkovit
Edelsteine Neuburg - Gundolf Fischer - search for: Ushkovit

Locations with GPS information