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Bonshtedtite (Bonshtedtit)

Collectors Summary

Color farblos, rose, gelblich, grünlich
Streak color weiß
Hardness (Mohs) 4.25
Solubility +++ Säuren
Crystal System monoklin, P21/m

Chemism

Chemical formula

Na3Fe2+(PO4)(CO3)

Chemical composition

Eisen, Natrium, Kohlenstoff, Phosphor, Sauerstoff

Unit weight: 279.7950618 u; Number of atoms in the formula: 13

Info

Empirical formula:

Na3Fe(PO4)(CO3)

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Carbon

C

4.29

1

7.69

12.0107800

12.0107800

Oxygen

O

40.03

7

53.85

15.9994300

111.9960100

Sodium

Na

24.65

3

23.08

22.9897702

68.9693106

Phosphorus

P

11.07

1

7.69

30.9737612

30.9737612

Iron

Fe

19.96

1

7.69

55.8452000

55.8452000

Analysis wt%

Ø Na2O : 34.17, MgO : 3.57, MnO : 0.98, FeO : 16.73, P2O5 : 25.99, CO2 : 15.39 (Ref: Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva, 1904-1974 82)

Strunz 9th edition incl. updates

5.BF.10

5: Carbonate (Carbonate, Nitrate)
B: Carbonate mit weitere Anionen, ohne H2O
F: Mit [Cl], SO4, P04
10:Bradleyit-Gruppe

Lapis Classification

V/C.04-030

V: NITRATE, CARBONATE UND BORATE
C: Wasserfreie Carbonate, mit fremden Anionen

Classification by Hölzel

5.BC.220

5: CARBONATES NITRATES ARSENITES SULFITES SELENITES TELLURITES IODATES
B: Carbonates (+Anions -Water)
C: Tychite-Bradleyite-Group

Dana 8th edition

43.02.01.03

43: Compound Phosphates, etc.
02: Compound Phosphates, etc. (Anhydrous Normal Compound Anions)
01: Bradleyite Group

Optical Properties

Color

farblos, rose, gelblich, grünlich

Streak color

weiß

Diaphaneity (Transparency)

transparent

max. Birefringence

0.071

Birefringence chart\! Bonshtedtite title=Birefringence chart Bonshtedtite

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

1.523

RI value β

1.569

RI value γ / ε

1.594

Ri mean

1.562

2V angle

Biaxial (-) 68°

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

11

Space Group

P21/m

Cell parameters a (Å)

8.921

Cell parameters b (Å)

6.631

Cell parameters c (Å)

5.151

Cell parameters a/b or c/a

1.345

Cell parameters c/b

0.777

Cell parameters α

90°

Cell parameters β

90.42

Cell parameters γ

90°

Z

2

Volume (ų)

304.7

X-Ray Powder Diffraction

8.923(20),
4.465(10),
3.318(100),
2.662(30),
2.578(20),
2.146(20),
1.851(10),
1.658(20)

XRD chart Bonshtedtite

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)

4.25

VHN (Hardness Vickers)

225 (25g)

Density (g/cm³)

2.95 - 3.16 / Durchschnittlich = 3.05

3.049 ( ρ calc. Mineralienatlas )

Instability

+++ Säuren

References

S. V. Krivovichev , A. P. Chernyatieva , S. N. Britvin , V. N. Yakovenchuk, V. G. Krivovichev: Refinement of the crystal structure of bonshtedtite, Na3Fe(PO4)(CO3). Geology of Ore Deposits Vol. 55, Issue 8 (2013) S. 669 - 675.

Other languages

German

Bonshtedtit

Spanish

Bonshtedtita

French

Bonshtedtite

English

Bonshtedtite

Russian

Бонштедтит

CNMNC (IMA)-Number

IMA 1981-026

CNMNC symbol

Symbol

Bsd

Locations with GPS information

IDs

GUSID (Global unique identifier short form) 7SdH7Hk1w0esCjnUdkOq3w
GUID (Global unique identifier) EC4727ED-3579-47C3-AC0A-39D47643AADF
Database ID 447