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Uricite

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Uricit auf Dolomit
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Uricit auf Dolomit

Bildbreite: 1,5 mm; Fundort: Grube Clara, Oberwolfach, Schwarzwald, Deutschland; durch PXRD bestätigt

Copyright: Stephan Wolfsried
Contribution: slugslayer 2010-09-05
Locality: Grube Clara / Oberwolfach / Ortenaukreis / Freiburg, Bezirk / Baden-Württemberg / Deutschland

Collectors Summary

Color farblos, gelblich weiß
Streak color weiß
Hardness (Mohs) 1.5
Solubility +++ Alkalien
Crystal System monoklin, P21/a

Chemism

Chem­ical formula

C5H4N4O3

Chem­ical com­po­si­tion

Kohlenstoff, Sauerstoff, Stickstoff, Wasserstoff

Unit weight: 168.110858 u; Number of atoms in the formula: 16

Info

Empirical formula:

C5H4N4O3

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

2.40

4

25.00

1.0079470

4.0317880

Carbon

C

35.72

5

31.25

12.0107800

60.0539000

Nitrogen

N

33.33

4

25.00

14.0067200

56.0268800

Oxygen

O

28.55

3

18.75

15.9994300

47.9982900

Anal­y­sis wt%

C : 35.72, H : 2.40, N : 33.33, O : 28.55 (Ref: berechnet)

Strunz 9th edi­tion incl. updates

10.CA.40

10: Organische Verbindungen
C: Diverse organische Mineralien
A: Unterabteilung 10.CA
40:Uricit-Gruppe

Lapis Clas­sifica­tion

IX/D.01-040

IX: ORGANISCHE VERBINDUNGEN
D: Stickstoff-haltige Kohlenwasserstoffe

Clas­sifica­tion by Hölzel

A.CA.120

A: ORGANIC COMPLEXES
C: Bases
A:

Dana 8th edi­tion

50.04.04.01

50: Organic Minerals
04: Salts of Organic Acids with miscellaneous formulae

IMA sta­tus

Anerkannt von der CNMNC

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

farblos, gelblich weiß

Streak color

weiß

Diaphane­ity (Trans­parency)

transparent

max. Birefrin­gence

0.310

Birefringence chart\! Uricite title=Birefringence chart Uricite

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

1.588

RI value β

1.739

RI value γ / ε

1.898

Ri mean

1.742

2V angle

Biaxial (+) 84°

Crystallography

Crystal Sys­tem

monoklin

Class (H-M)

2/m

Space Group number

14

Space Group

P21/a

Cell param­e­ters a (Å)

14.464

Cell param­e­ters b (Å)

7.403

Cell param­e­ters c (Å)

6.208

Cell param­e­ters a/b or c/a

1.954

Cell param­e­ters c/b

0.839

Cell param­e­ters α

90°

Cell param­e­ters β

65.10

Cell param­e­ters γ

90°

Z

4

Volumne (ų)

602.943

X-Ray Pow­der Diffrac­tion

6.55(40),
5.63(20),
4.91(50),
3.864(40),
3.180(50),
3.093(100),
3.087(70),
2.866(20)

XRD chart Uricite

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)

1.5

VHN (Hard­ness Vick­ers)

18 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

1.85

1.852 ( ρ calc. Mineralienatlas )

Insta­bil­ity

+++ Alkalien

Preface

Author (Name, Year)

Bridge, 1974

References

Mineralogical Magazine 39 (1974), 889

Other languages

German

Uricit

Spanish

Uricita

English

Uricite

French

Uricite

Alternative Name

German

Harnsäure

Uric Acid

CNMNC (IMA)-Number

IMA 1973-055

CNMNC symbol

Symbol

Uri

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