Oxammite Mineral Data

Oxammite Mineral Data +

General Oxammite Information

Chemical Formula:

(NH4)2(C2O4)·(H2O)

Composition:

Molecular Weight = 142.11 gm

Hydrogen 5.67 % H - % Calc as (NH₄)₂O

Hydrogen 1.42 % H 12.68 % H₂O

Carbon 16.90 % C 50.68 % C₂O₃

Nitrogen 19.71 % N 36.64 % (NH₄)₂O

Oxygen 56.29 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

(NH₄)₂(C₂O₄)·(H₂O)

IMA Status:

Valid Species (Pre-IMA) 1870

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 64936

PDF 14-801

Oxammite Image

Images:

Oxammite

Comments: Pale yellow translucent crystalline granular oxammite.
Location: Petrogale Cave, Western Australia, Australia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Oxammite Crystallography

Axial Ratios:

a:b:c =0.7793:1:0.3686

Cell Dimensions:

a = 8.035, b = 10.31, c = 3.801, Z = 2; V = 314.88 Den(Calc)= 1.50

Crystal System:

Orthorhombic - DisphenoidalH-M Symbol (2 2 2) Space Group: P 2₁2₁2

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

By Intensity(I/I_o): 2.666(1), 3.057(0.95), 6.32(0.95),

Physical Properties of Oxammite

Cleavage:

[001] Distinct

Color:

Colorless, Yellowish white.

Density:

1.5

Diaphaniety:

Transparent

Hardness:

2.5 - Finger Nail

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Oxammite

Gladstone-Dale:

CI meas= -7.146 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -7.146 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.3511,KPDmeas= 0.3511,KC= 0.0431

Optical Data:

Biaxial (-), a=1.438, b=1.547, g=1.595, bire=0.1570, 2V(Calc)=62, 2V(Meas)=62.

Calculated Properties of Oxammite

Electron Density:

r_electron=1.60 gm/cc
note: r_Oxammite=1.50 gm/cc.

Fermion Index

Fermion Index = 0.19853
Boson Index = 0.80147

Photoelectric:

PE_Oxammite= 0.31 barns/electron
U=PE_Oxammite x r_electron= 0.50 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Oxammite is Not Radioactive

Oxammite Classification

Dana Class:

50.1.5.1 (50)Salts of Organic Acids

(50.1)(Oxalates)

(50.1.5)Dana Group

50.1.5.1 Oxammite (NH4)2(C2O4)·(H2O) P 2₁2₁2 2 2 2

Strunz Class:

IX/A.01-30 IX - Organic compunds

IX/A - Oxalates. Salts from organic acids. [C2O4]2- arranged after increasing cation size

IX/A.01 - Whewellite - Wheatleyite series

IX/A.01-05 Natroxalate! Na2C2O4 P 2₁/a 2/m

IX/A.01-10 Whewellite Ca(C2O4)·(H2O) P 2₁/n 2/m

IX/A.01-20 Weddellite Ca(C2O4)·2(H2O) I 4/m 4/m

IX/A.01-25 Caoxite! Ca(C2O4)·3(H2O) P1 1

IX/A.01-28 Novgorodovaite! Ca2(C2O4)Cl2·2(H2O) I2/m 2/m

IX/A.01-30 Oxammite (NH4)2(C2O4)·(H2O) P 2₁2₁2 2 2 2

IX/A.01-40 Glushinskite Mg(C2O4)·2(H2O) C 2/c 2/m

IX/A.01-50 Humboldtine Fe(C2O4)·2(H2O) I2/a 2/m

IX/A.01-55 Lindbergite! Mn(C2O4)·2(H2O) C 2/c 2/m

IX/A.01-60 Minguzzite K3Fe(C2O4)3·3(H2O) P 2₁/c 2/m

IX/A.01-70 Zhemchuzhnikovite NaMg(Al,Fe)(C2O4)3·8(H2O) Unk Trig

IX/A.01-80 Stepanovite NaMgFe(C2O4)3·8-9(H2O) Unk Trig

IX/A.01-90 Moolooite Cu(C2O4)·n(H2O)(n<1) Unk Ortho

IX/A.01-100 Wheatleyite Na2Cu(C2O4)2·2(H2O) P1 1

IX/A.01-110 Coskrenite-(Ce)! (Ce,Nd,La)2(SO4)2(C2O4)·8(H2O) C 2/c 2/m

IX/A.01-120 Levinsonite-(Y)! (Y,Nd,La)Al(SO4)2(C2O4)·12(H2O) P 2/n 2/m

IX/A.01-130 Zugshunstite-(Ce)! (Ce,Nd,La)Al(SO4)2(C2O4)·8(H2O) C 2/c 2/m

Other Oxammite Information

References:

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

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

Oxammite

(NH4)2(C2O4)·(H2O)
Dana No: 50.1.5.1 Strunz No: IX/A.01-30
Locality:

Notes: