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Mengxianminite

Additional Functions

Collectors Summary

Color bräunlichgrün
Hardness (Mohs) 6
Crystal System orthorhombisch, Fdd2

Chemism

Chemical formula

(Ca,Na)2Sn2(Mg,Fe)3Al8[(BO3)(BeO4)O6]2

Chemical composition

Aluminium, Beryllium, Calcium, Eisen, Magnesium, Natrium, Zinn, Bor, Sauerstoff

Unit weight: 1077.0894203 u; Number of atoms in the formula: 45

Info

Empirical formula:

(Ca0.75Na0.25)2Sn2(Mg0.75Fe0.25)3Al8[(BO3)(BeO4)O6]2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Beryllium

Be

1.67

2

4.44

9.0121823

18.0243646
Boron

B

2.01

2

4.44

10.8117000

21.6234000
Oxygen

O

38.62

26

57.78

15.9994300

415.9851800
Sodium

Na

1.07

0.5

1.11

22.9897702

11.4948851
Magnesium

Mg

5.08

2.25

5.00

24.3050600

54.6863850
Aluminium

Al

20.04

8

17.78

26.9815382

215.8523056
Calcium

Ca

5.58

1.5

3.33

40.0784000

60.1176000
Iron

Fe

3.89

0.75

1.67

55.8452000

41.8839000
Tin

Sn

22.04

2

4.44

118.7107000

237.4214000

Strunz 9th edition incl. updates

4.CC.60

4: Oxide, Hydroxide (Oxide, Hydroxide, V[5,6]-Vanadate, Arsenite, Antimonite, Bismutite, Sulfite, Selenite, Tellurite, Iodate)
C: Metall: Sauerstoff = 2: 3,3: 5, und vergleichbare
C: Mit großen und mittelgroßen Kationen
60:Mengxianminit-Gruppe

Lapis Classification

V/G.05-050

V: NITRATE, CARBONATE UND BORATE
G: Inselborate
5: [BO3] 3--Inseln

IMA status

anerkannt - CNMNC Dez. 2015

Mineral status

anerkanntes Mineral

Optical Properties

Color

bräunlichgrün

Crystallography

Crystal System

orthorhombisch

Class (H-M)

mm2

Space Group number

43

Space Group

Fdd2

Cell parameters a (Å)

60.689(3)

Cell parameters b (Å)

9.907(1)

Cell parameters c (Å)

5.740(1)

Cell parameters a/b or c/a

6.126

Cell parameters c/b

0.579

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

2

Volume (ų)

3451.152

X-Ray Powder Diffraction

3.00(35),
2.931(100),
2.475(29),
2.430(30),
2.375(100),
2.028(52),
1.807(35),
1.530(98),
1.231(50),
1.079(60)
XRD chart Mengxianminite

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Physical Properties

Hardness (Mohs)

6

Density (g/cm³)

1.036 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

China/Hunan, Provinz/Chenzhou, Präfektur/Linwu, Kreis/Xianghualing Sn-Erzfeld

Type material

Geological Museum of China, No. 16, Yangrou Hutong, Xisi, Beijing 100031, P.R. of China

Laboratory of Mineralogy, University of Liège, Belgium

Collection number of type material

Beijing: M13293

Liège: 20395

Paragenesis of type material

Fluorit, Phlogopit, Hsianghualith, Magnetit, Dravit, Magnesiotaaffeit-2N′2S, Calcit.

Preface

Author (Name, Year)

Can, Hatert, Dal Bo, Wang, Gu, Baijot, 2017

References

International Mineralogical Association, General Meeting Program Abstracts (1986), 130

Rao, C., Hatert, F., Dal Bo, F.,Wang, R., Gu, X. and Baijot, M. (2016) Mengxianminite, IMA 2015-070. CNMNC Newsletter No. 29, February 2016, page 200; Mineralogical Magazine, 80, 199–205.

Rao Can, Frédéric Hatert, Fabrice Dal Bo, Rucheng Wang, Xiangping Gu and Maxime Baijot: Mengxianminite (Ca2Sn2Mg3Al8[(BO3)(BeO4)O6]2) a new borate mineral from Xianghualing skarn, Hunan Province, China, with a highly unusual chemical combination (B + Be + Sn). American Mineralogist Vol. 102, Nr. 10 (2017) S. 2136-2141.

Other languages

German

Mengxianminit

Spanish

Mengxianminita

French

Mengxianminite

English

Mengxianminite

Russian

Менсинминит

CNMNC (IMA)-Number

IMA 2015-070

CNMNC symbol

Symbol

Mgx

IDs

GUSID (Global unique identifier short form) fPw_ZgMOiUGg3Nh-uzX9Sg
GUID (Global unique identifier) 663FFC7C-0E03-4189-A0DC-D87EBB35FD4A
Database ID 2468