Hollingworthite Mineral Data

Hollingworthite Mineral Data +

[New Updates] [Gallery 1] [Gallery 2] [Gallery 3] [Rock Shop Gallery]
Serving the mineral collector and educator community since 1970
Over 900,000 mineral specimens in stock
New minerals acquired weekly - Wright's Rock Shop

General Hollingworthite Information

Chemical Formula:

(Rh,Pt,Pd)AsS

Composition:

Molecular Weight = 237.90 gm

Arsenic 31.49 % As

Palladium 4.47 % Pd

Platinum 24.60 % Pt

Rhodium 25.95 % Rh

Sulfur 13.48 % S

______

100.00 %

Empirical Formula:

Rh_0.6Pt_0.3Pd_0.1AsS

Environment:

In a dunite pipe deposit and platinum deposits in layered ultramafic intrusives.

IMA Status:

Approved IMA 1965

Locality:

Driekop and Onverwacht mines, Transvaal, South Africa. Link to MinDat.org Location Data.

Name Origin:

For Professor Sidney Ewart Hollingworth (1899-1966).

Hollingworthite Image

Images:

Click Here for Larger Hollingworthite Image

Hollingworthite Laurite

Comments: Gray grain of hollingworthite (in the center of the picture) with very slightly darker gray laurite (at the right margin). Polished section (from microprobe analysis).
Location: Konder Mine, Konder alkaline-ultrabasic massif, Aldan shield, Saha (Sakha) Republic (Yakutia), Eastern-Siberian Region, Russia. Scale: Picture size 0.1 mm.
© Thomas Witzke / Abraxas-Verlag

Images:

Hollingworthite Laurite

Comments: Gray laurite with two smaller grains of hollingworthite (left and right from the laurite, very slightly lighter gray). Polished section (from microprobe analysis) in reflected light.
Location: Konder Mine, Konder alkaline-ultrabasic massif, Aldan shield, Saha (Sakha) Republic (Yakutia), Eastern-Siberian Region, Russia. Scale: Picture size 0.15 mm.
© Thomas Witzke / Abraxas-Verlag

Hollingworthite Crystallography

Cell Dimensions:

a = 5.769, Z = 4; V = 192.00 Den(Calc)= 8.23

Crystal System:

Isometric - DiploidalH-M Symbol (2/m 3) Space Group: P a3

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

By Intensity(I/I_o): 1.74(1), 2.87(1), 3.31(1),

Physical Properties of Hollingworthite

Color:

Gray.

Density:

7.91

Diaphaniety:

Opaque

Hardness:

6-6.5 - Orthoclase-Pyrite

Luster:

Metallic

Optical Properties of Hollingworthite

RL Color:

Medium gray, slightly bluish in oil.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Hollingworthite in Air**
λ	R	∑ R(λ)
420 nm	50.00
440 nm	51.30
460 nm	51.90
480 nm	51.90
500 nm	51.60
520 nm	51.30
540 nm	50.80
560 nm	50.20
580 nm	49.70
600 nm	49.20
620 nm	48.50
640 nm	47.80
660 nm	47.20
680 nm	46.40
700 nm	45.60

**Calculated Relative Intensity Colors of Hollingworthite in Air**
Relative Intensity	0%	20%	40%	60%	80%	100%	120%	140%	160%	180%	190%
R

Calculated Properties of Hollingworthite

Electron Density:

r_electron=7.20 gm/cc
note: r_{Hollingworthite}=8.23 gm/cc.

Fermion Index

Fermion Index = 0.09414
Boson Index = 0.90586

Photoelectric:

PE_{Hollingworthite}= 457.29 barns/electron
U=PE_{Hollingworthite} x r_electron=3,290.56 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Hollingworthite is Not Radioactive

Hollingworthite Classification

Dana Class:

2.12.3.8 (2)Sulfides - Including Selenides and Tellurides

(2.12)where Am Bn Xp, with (m+n):p=1:2

(2.12.3)Cobaltite Group (Cubic or pseudocubic crystals)

2.12.3.1 Cobaltite CoAsS P ca2₁ mm2

2.12.3.2 Gersdorffite NiAsS P 2₁3 2 3

2.12.3.3 Ullmannite NiSbS P 2₁3 2 3

2.12.3.4 Willyamite (Co,Ni)SbS P 2₁3 2 3

2.12.3.5 Tolovkite IrSbS P 2₁3 2 3

2.12.3.6 Platarsite (Pt,Rh,Ru)AsS P a3 2/m 3

2.12.3.7 Irarsite (Ir,Ru,Rh,Pt)AsS P a3 2/m 3

2.12.3.8 Hollingworthite (Rh,Pt,Pd)AsS P a3 2/m 3

2.12.3.9 Jolliffeite (Ni,Co)AsSe P a3 2/m 3

2.12.3.10 Padmaite PdBiSe P 2₁3 2 3

2.12.3.11 Michenerite (Pd,Pt)BiTe P 2₁3 2 3

2.12.3.12 Maslovite PtBiTe P 2₁3 2 3

2.12.3.13 Testibiopalladite PdTe(Sb,Te) P 2₁3 2 3

2.12.3.14 Changchengite! IrBiS P 2₁3 2 3

2.12.3.15 Milotaite! PdSbSe P 2₁/3 2 3

2.12.3.16 IMA2004-047! PdAsSe Pa3 4/m 2/m 2/m

Strunz Class:

II/D.18-50 II - Sulfides and sulphosalts

II/D - Sulfides with metal: sulfur, selenium and tellurium < 1:1, Tellurides with Copper, Silver, Gold

II/D.18 - Cobaltite group, Cobaltite - Ullmannite - Tolovkite series

II/D.18-10 Cobaltite CoAsS P ca2₁ mm2

II/D.18-20 Gersdorffite NiAsS P 2₁3 2 3

II/D.18-25 Jolliffeite (Ni,Co)AsSe P a3 2/m 3

II/D.18-30 Willyamite (Co,Ni)SbS P 2₁3 2 3

II/D.18-40 Ullmannite NiSbS P 2₁3 2 3

II/D.18-50 Hollingworthite (Rh,Pt,Pd)AsS P a3 2/m 3

II/D.18-60 Irarsite (Ir,Ru,Rh,Pt)AsS P a3 2/m 3

II/D.18-70 Platarsite (Pt,Rh,Ru)AsS P a3 2/m 3

II/D.18-80 Tolovkite IrSbS P 2₁3 2 3

Other Hollingworthite Information

References:

NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)

See Also:

Links to other databases for Hollingworthite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 - WWW-MINCRYST 14 -École des Mines de Paris

Search for Hollingworthite using:

[ALTAVISTA] [AOL] [About.com] [All-The-Web] [HotBot] [Ixquick] [LookSmart] [MAMMA] [MSN.COM] [Netscape] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Hollingworthite :
AA Mineral Specimens
B and L Minerals
Crystal Vaults
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop

Translate Hollingworthite Mineral Data :

Ask about Hollingworthite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Hollingworthite Specimen Label here :

Hollingworthite

(Rh,Pt,Pd)AsS
Dana No: 2.12.3.8 Strunz No: II/D.18-50
Locality:

Notes: