Fettelite

Glasberg quarry, Nieder-Beerbach, Nieder-Ramstadt, Odenwald, Hesse, Germany
© Stephan Wolfsried

Show Fettelite Photos (13)

Formula:

HgAs

System:

Trigonal

Colour:

Dark violet to scarlet

Lustre:

Adamantine, Metallic

Hardness:

Name:

Named for M. Fettel, a collector who first observed it.

Easy to confuse with polybasite.

Classification of Fettelite

IMA status:

Approved 1994

Strunz 8th edition ID:

2/E.06-40

Nickel-Strunz 10th (pending) edition ID:

2.LA.30

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
L : Unclassified Sulfosalts
A : Without essential Pb

Dana 8th edition ID:

3.2.10.

3 : SULFOSALTS
2 : ø = 4

mindat.org URL:

http://www.mindat.org/min-1543.html
Please feel free to link to this page.

Type Occurrence of Fettelite

Type Locality:

Glasberg quarry, Nieder-Beerbach, Nieder-Ramstadt, Odenwald, Hesse, Germany

Physical Properties of Fettelite

Lustre:

Adamantine, Metallic

Colour:

Dark violet to scarlet

Streak:

vermillion

Hardness (Mohs):

Crystallography of Fettelite

Crystal System:

Trigonal

Cell Parameters:

a = 15.00Å, c = 15.46Å
β = (1)°

Ratio:

a:c = 1 : 1.031

Unit Cell Volume:

V 3,012.47 Å³ (Calculated from Unit Cell)

Morphology:

Platy

Twinning:

Intimately twinned with six twin domains.

Comment:

Strong hexagonal pseudosymmetry.

X-Ray Powder Diffraction:

d-spacing		Intensity
3.175		(60)
3.091		(100)
2.998		(40)
2.755		(30)

Chemical Properties of Fettelite

Formula:

HgAs

Essential elements:

Ag, As, Hg, S

All elements listed in formula:

Ag, As, Hg, S

Relationship of Fettelite to other Species

2.LA.10

Dervillite

AsS

2.LA.15

Daomanite

CuPtAsS

2.LA.20

Vaughanite

TlHgSb

2.LA.25

Criddleite

TlAg

2.LA.35

Chaméanite

(Cu,Fe)

As(Se,S)

2.LA.40

Arcubisite

CuBiS

2.LA.45

Mgriite

AsSe

2.LA.50

Benleonardite

(Sb,As)Te

2.LA.55

Tsnigriite

SbTe

(S,Se)

2.LA.60

Borovskite

SbTe

2.LA.65

Jonassonite

AuBi

Other Names for Fettelite

Synonyms:

IMA1994-056

Sanguinite

Other Languages:

German:	Fettelit
Spanish:	Fettelita

Other Information

Health Warning:

No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Fettelite

Reference List:

American Mineralogist, Volume 94, pages 609–615, 2009

Mineralogical Record: 28: 141.

Wang, N. & Paniagua, A. (1996): Fettelite, a new Hg-sulfosalt mineral from Odenwald. Neues Jahrbuch für Mineralogie, Monatshefte (1996): 313-320. [English abstract: Am. Min. 82,621(1997)