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Oxammite

Additional Functions

Collectors Summary

Color farblos, gelblich weiß
Streak color weiß
Hardness (Mohs) 2.5
Solubility +++ H2O
Crystal System orthorhombisch, P21212

Chemism

Chemical formula

(NH4)2(C2O4)·H2O

Chemical composition

Kohlenstoff, Sauerstoff, Stickstoff, Wasserstoff

Unit weight: 142.11162 u; Number of atoms in the formula: 19

Info

Empirical formula:

(NH4)2(C2O4)·H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

7.09

10

52.63

1.0079470

10.0794700

Carbon

C

16.90

2

10.53

12.0107800

24.0215600

Nitrogen

N

19.71

2

10.53

14.0067200

28.0134400

Oxygen

O

56.29

5

26.32

15.9994300

79.9971500

Strunz 9th edition incl. updates

10.AB.55

10: Organische Verbindungen
A: Salze organischer Säuren
B: Oxalate
55:Oxammit-Gruppe

Lapis Classification

IX/A.01-030

IX: ORGANISCHE VERBINDUNGEN
A: Salze organischer Säuren
1: Oxalate [C2O4] 2-

Classification by Hölzel

A.AA.150

A: ORGANIC COMPLEXES
A: Carbonacids and their Salts
A: Oxalates

Dana 8th edition

50.01.05.01

50: Organic Minerals
01: Salts of Organic Acids (Oxalates)

IMA status

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

Mineral status

anerkanntes Mineral

Optical Properties

Color

farblos, gelblich weiß

Streak color

weiß

Diaphaneity (Transparency)

transparent

max. Birefringence

0.057

Birefringence chart\! Oxammite title=Birefringence chart Oxammite

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

1.438

RI value β

1.547

RI value γ / ε

1.595

Ri mean

1.527

2V angle

Biaxial (-) 62°

Crystallography

Crystal System

orthorhombisch

Class (H-M)

222

Space Group number

18

Space Group

P21212

Cell parameters a (Å)

8.035

Cell parameters b (Å)

10.31

Cell parameters c (Å)

3.801

Cell parameters a/b or c/a

0.779

Cell parameters c/b

0.369

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

2

Volume (ų)

314.878

X-Ray Powder Diffraction

6.46(80),
3.83(70),
3.29(60),
3.07(60),
2.88(60),
2.68(100),
2.62(100),
2.47(60)

XRD chart Oxammite

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)

2.5

VHN (Hardness Vickers)

53 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

1.5

1.499 ( ρ calc. Mineralienatlas )

Instability

+++ H2O

Preface

Author (Name, Year)

Shepard, 1870

References

Handbook of Mineralogy (Anthony et al.), 5 (2003), 521

Other languages

Spanish

Oxamita

German

Oxammit

English

Oxammite

French

Oxammite

Russian

Оксаммит

https://catalogmineralov.ru/mineral/oxammite.html

Alternative Name

Guaapite

Spanish

Oxammita

CNMNC symbol

Symbol

Oxa

IDs

GUSID (Global unique identifier short form) koXh3Cb7CEKX7AGKIkcGHg
GUID (Global unique identifier) DCE18592-FB26-4208-97EC-018A2247061E
Database ID 2874