Rambergite Mineral Data

Rambergite Mineral Data +

General Rambergite Information

Chemical Formula:

MnS

Composition:

Molecular Weight = 87.00 gm

Manganese 63.14 % Mn

Sulfur 36.86 % S

______

100.00 %

Empirical Formula:

Mn²⁺S

Environment:

Found in anoxic laminated sediments rich in organic matter. Dimorphic relationship with alabandite.

IMA Status:

Approved IMA 1995 (Dana # Added)

Locality:

Gotland Deep, Baltic Sea, off the coast of Sweden. Also found in a skarn in the Garpenberg area, Dalarna, Sweden. Link to MinDat.org Location Data.

Name Origin:

Named after Hans Ramberg (1917-1998), Professor of Mineralogy and Petrology at the University of Chicago, then at the University of Uppsala, Sweden.

Synonym:

IMA1995-028

Rambergite Image

Images:

Rambergite Hauerite

Comments: Small black octahedral crystals of hauerite with small brown crystals of rambergite.
Location: Ronneburg U deposit, Gera district, Thuringia, Germany. Scale: Picture size 0.8 mm.
© Thomas Witzke / Abraxas-Verlag

Images:

Rambergite

Comments: Dark reddish-brown rambergite mass in matrix.
Location: Ronneberg, Thuringen, Germany. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Rambergite Crystallography

Axial Ratios:

a:c = 1:1.61836

Cell Dimensions:

a = 3.975, c = 6.433, Z = 2; V = 88.03 Den(Calc)= 3.28

Crystal System:

Hexagonal - Dihexagonal PyramidalH-M Symbol (6mm) Space Group: P 6₃mc

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 1.82(1)(103), 3.445(0.89)(100), 1.988(0.82)(110),3.217(0.72)(002), 3.036(0.66)(101), 1.691(0.63)(112),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
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Eriksson L , Kalinowski M P , Acta Crystallographica, Section E , 57 (2001) p.i92-i93, Mn1-xFexS, x=0.05, an example of an anti-wurtzite structure, Locality: synthetic

View Additional jPOWD Structure files for Rambergite
[1]

Physical Properties of Rambergite

Cleavage:

[001] Distinct, [110] Distinct

Color:

Brown, Black.

Diaphaniety:

Opaque

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Habit:

Hexagonal - Six-sided crystal shape in cross-section or habit.

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Hardness:

4 - Fluorite

Luster:

Resinous

Streak:

brown

Optical Properties of Rambergite

Optical Data:

Uniaxial (+/-), a=2.62-2.77, b=2.62-2.77, bire=0.0000.

RL Color:

Steel gray with brown-red internal reflections.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Rambergite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
470 nm	24.50	22.10
546 nm	22.60	20.50
589 nm	22.10	20.00
650 nm	21.60	19.60

**Calculated Relative Intensity Colors of Rambergite in Air**
Relative Intensity	0%	50%	100%	150%	200%	250%	300%	350%	400%	440%
R₁
R₂

Calculated Properties of Rambergite

Electron Density:

r_electron=3.09 gm/cc
note: r_Rambergite=3.28 gm/cc.

Fermion Index

Fermion Index = 0.00276
Boson Index = 0.99724

Photoelectric:

PE_Rambergite= 18.54 barns/electron
U=PE_Rambergite x r_electron= 57.32 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Rambergite is Not Radioactive

Rambergite Classification

Dana Class:

2.8.7.4 (2)Sulfides - Including Selenides and Tellurides

(2.8)where Am Bn Xp, with (m+n):p=1:1

(2.8.7)Wurtzite Group (Hexagonal: P63mc)

2.8.7.1 Wurtzite (Zn,Fe)S P 6₃mc 6mm

2.8.7.2 Greenockite CdS P 6₃mc 6mm

2.8.7.3 Cadmoselite CdSe P 6₃mc 6mm

2.8.7.4 Rambergite ! MnS P 6₃mc 6mm

Strunz Class:

II/C.13-50 II - Sulfides and sulphosalts

II/C - Sulfides with metal: sulfur, selenium and tellurium = 1:1

II/C.13 - Wurtzite series

II/C.13-10 Wurtzite (Zn,Fe)S P 6₃mc 6mm

II/C.13-20 Matraite ZnS R 3m 3m

II/C.13-30 Greenockite CdS P 6₃mc 6mm

II/C.13-40 Cadmoselite CdSe P 6₃mc 6mm

II/C.13-50 Rambergite MnS P 6₃mc 6mm

Other Rambergite Information

References:

NAME( CanMin, 8/99) PHYS. PROP.(MinRec, Vol 33, p 168) OPTIC PROP.(Am.Min.,Vol.83,p1117,1998)

See Also:

Links to other databases for Rambergite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -Handbook of Mineralogy (UofA) 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas

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Rambergite

MnS
Dana No: 2.8.7.4 Strunz No: II/C.13-50
Locality:

Notes: