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Stercorite (Stercorit)

Collectors Summary

Color farblos, bräunlichweiß
Streak color weiß
Hardness (Mohs) 2
Solubility +++ H2O
Crystal System triklin, P1

Chemism

Chemical formula

H(NH4)Na(PO4)·4H2O

Chemical composition

Natrium, Phosphor, Sauerstoff, Stickstoff, Wasserstoff

Unit weight: 209.0690024 u; Number of atoms in the formula: 24

Info

Empirical formula:

H(NH4)Na(PO4)·4H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

6.27

13

54.17

1.0079470

13.1033110

Nitrogen

N

6.70

1

4.17

14.0067200

14.0067200

Oxygen

O

61.22

8

33.33

15.9994300

127.9954400

Sodium

Na

11.00

1

4.17

22.9897702

22.9897702

Phosphorus

P

14.82

1

4.17

30.9737612

30.9737612

Strunz 9th edition incl. updates

8.CJ.05

8: Phosphate, Arsenate, Vanadate
C: Phosphate ohne weitere Anionen, mit H2O
J: Ausschließlich mit großen Kationen
05:Stercorit-Gruppe

Lapis Classification

VII/C.23-060

VII: PHOSPHATE, ARSENATE UND VANADATE ("Phosphate" des Registers immer einschließlich isotyper Arsenate und Vanadate!)
C: Wasserhaltige Phosphate, ohne fremde Anionen
23: Mittelgroße und große Kationen: Fe-Mn-Zn-Mg und Ca-(NH4) 1+

Classification by Hölzel

8.CF.160

8: PHOSPHATES ARSENATES VANADATES
C: Phosphates (-Anions +Water)
F: Phosphates, C large, V: 1 to 4
1: Valency: 1 Dorfmanite-Group

Dana 8th edition

39.03.01.01

39: Hydrated Acid Phosphates, etc
03: Hydrated Acid Phosphates, etc with miscellaneous formulae

IMA status

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

Mineral status

anerkanntes Mineral

Optical Properties

Color

farblos, bräunlichweiß

Streak color

weiß

max. Birefringence

0.030

Birefringence chart\! Stercorite title=Birefringence chart Stercorite

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

1.439

RI value β

1.442

RI value γ / ε

1.469

Ri mean

1.450

2V angle

Biaxial (+) 36°

Crystallography

Crystal System

triklin

Class (H-M)

1

Space Group number

2

Space Group

P1

Cell parameters a (Å)

6.921

Cell parameters b (Å)

10.616

Cell parameters c (Å)

6.438

Cell parameters a/b or c/a

0.652

Cell parameters c/b

0.606

Cell parameters α

98.28

Cell parameters β

90.42

Cell parameters γ

71.17

Z

2

Volume (ų)

442.651

X-Ray Powder Diffraction

9.93(90),
6.53(100),
4.77(40),
4.69(30),
4.24(50),
3.658(40),
2.911(50),
2.884(50)

XRD chart Stercorite

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

VHN (Hardness Vickers)

32 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

1.615

1.568 ( ρ calc. Mineralienatlas )

Instability

+++ H2O

Preface

Author (Name, Year)

Herepath, 1850

References

Handbook of Mineralogy (Anthony et al.), 4 (2000), 561

Other languages

German

Stercorit

Spanish

Stercorita

French

Stercorite

English

Stercorite

Russian

Стеркорит

Alternative Name

Spanish

Estercorrita

Microcosmic Salt

Native Salt of Phosphorus

German

Phosphorsalz

CNMNC symbol

Symbol

Stc

Locations with GPS information

IDs

GUSID (Global unique identifier short form) raZW-STm_k2mWEsk4O1d8A
GUID (Global unique identifier) F956A6AD-E624-4DFE-A658-4B24E0ED5DF0
Database ID 3622