Romarchite Mineral Data

Romarchite Mineral Data +

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General Romarchite Information

Chemical Formula:

SnO

Composition:

Molecular Weight = 134.71 gm

Tin 88.12 % Sn 100.00 % SnO

Oxygen 11.88 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

SnO

IMA Status:

Approved IMA 1969

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 16481

IMA1969-006

PDF 6-395

Romarchite Image

Images:

Romarchite

Comments: SEM photograph of romarchite precipitating on quartz sand grains on the surface of a pewter artifact. (Geoarchaeology, 19:538).
Location: Wreck of the Queen Anne?s Revenge (A.D. 1718). Scale: Scale Bar 30 µm.
© Geoarchaeology

Romarchite Crystallography

Axial Ratios:

a:c = 1:1.2744

Cell Dimensions:

a = 3.79, c = 4.83, Z = 2; V = 69.38 Den(Calc)= 6.45

Crystal System:

Tetragonal - Ditetragonal DipyramidalH-M Symbol (4/m 2/m 2/m) Space Group: P 4/nmm

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

By Intensity(I/I_o): 2.98(1), 1.601(0.9), 1.799(0.7),

Physical Properties of Romarchite

Color:

Black.

Hardness:

2-2.5 - Gypsum-Finger Nail

Optical Properties of Romarchite

Optical Data:

NCalc= 1.9 - from Gladstone-Dale relationship (KC = 0.14) where Ncalc=Dcalc*KC+1

Calculated Properties of Romarchite

Electron Density:

r_electron=5.55 gm/cc
note: r_Romarchite=6.45 gm/cc.

Fermion Index

Fermion Index = 0.14651
Boson Index = 0.85349

Photoelectric:

PE_Romarchite= 281.75 barns/electron
U=PE_Romarchite x r_electron=1,564.91 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Romarchite is Not Radioactive

Romarchite Classification

Dana Class:

4.2.5.1 (4)Simple Oxides

(4.2)with a cation charge of 2+ (A++ O)

(4.2.5)Dana Group

4.2.5.1 Romarchite SnO P 4/nmm 4/m 2/m 2/m

Strunz Class:

IV/A.08-10 IV - Oxides

IV/A - Oxides with metal : oxygen = 1:1 and 2:1 (M2O,MO)

IV/A.08 - Periclase Group, Romarchite ? - Hydroromarchite ? series

IV/A.08-10 Romarchite SnO P 4/nmm 4/m 2/m 2/m

IV/A.08-20 Hydroromarchite Sn3O2(OH)2 P 4/mnc 4/m 2/m 2/m

Other Romarchite Information

References:

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

See Also:

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

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

Romarchite

SnO
Dana No: 4.2.5.1 Strunz No: IV/A.08-10
Locality:

Notes: