Methane hydrate-I Mineral Data

Methane hydrate-I Mineral Data

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General Methane hydrate-I Information

Chemical Formula:

46(H2O)·2(S)·6(L)

Composition:

Molecular Weight = 957.04 gm

Hydrogen 13.06 % H

Carbon 10.04 % C

Oxygen 76.90 % O

______

100.00 %

Empirical Formula:

(CH4)₈(H₂O)₄₆

Environment:

4 - 5 deg C and 50 atmospheres. Type II structure where S=N2,CH4,H2S L=CH4,H2S,CO2. Found in subsurface gas hydrate deposits.

IMA Status:

Not Submitted IMA (Dana # Added)

Locality:

World wide. Link to MinDat.org Location Data.

Name Origin:

Named for the composition of the component chemicals.

Synonym:

Methane Clathrate

Methane hydrate

Methane hydrate-I Image

Images:

Methane hydrate-I

Comments: Yellow to white outcropping of massive methane hydrate infested with 2 to 5 cm polychaete worms (Hesiocoeca sp), AKA "ice worms".
Location: 540 meters deep in the Gulf of Mexico. Scale: Picture size 30 cm.
© Charles Fisher / Penn State

Methane hydrate-I Crystallography

Cell Dimensions:

a = 17.3, Z = 3; V = 5,177.72 Den(Calc)= 0.92

Crystal System:

Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: P m3n

Physical Properties of Methane hydrate-I

Cleavage:

None

Color:

White, Yellow white.

Density:

0.95

Diaphaniety:

Transparent

Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Crystalline - Coarse - Occurs as well-formed coarse sized crystals.

Habit:

Massive - Granular - Common texture observed in granite and other igneous rock.

Hardness:

2.5 - Finger Nail

Luster:

Vitreous - Dull

Streak:

white

Optical Properties of Methane hydrate-I

Optical Data:

Isotropic, n=1.3.

Calculated Properties of Methane hydrate-I

Electron Density:

r_electron=1.04 gm/cc
note: r_{Methane hydrate-I}=0.92 gm/cc.

Fermion Index

Fermion Index = 0.00149
Boson Index = 0.99851

Photoelectric:

PE_{Methane hydrate-I}= 0.32 barns/electron
U=PE_{Methane hydrate-I} x r_electron= 0.33 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Methane hydrate-I is Not Radioactive

Methane hydrate-I Classification

Dana Class:

4.1.3.1 (4)Simple Oxides

(4.1)with a cation charge of 1+ (A+2 O)

(4.1.3)Gas Hydrate Group

4.1.3.1 Methane hydrate-I ! 46(H2O)·2(S)·6(L) P m3n 4/m 3 2/m

4.1.3.2 Methane hydrate-II! 136(H2O)·16(S)·8(L) F d3m 4/m 3 2/m

4.1.3.3 Methane hydrate-H! 34(H2O)·3(S)·2(M)·1(L) P 6/mmm 6/m 2/m 2/m

Strunz Class:

IV/X.00-00 IV - Oxides

IV/X - Unclassified Strunz Oxides

IV/X.00 - Oxide

Other Methane hydrate-I Information

References:

PHYS. PROP.(AmMin, v 89, p1155)

See Also:

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

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Translate Methane hydrate-I Mineral Data :

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Print or Cut-and-Paste your Methane hydrate-I Specimen Label here :

Methane hydrate-I

46(H2O)·2(S)·6(L)
Dana No: 4.1.3.1 Strunz No: IV/X.00-00
Locality:

Notes: