Maufite Mineral Data

Maufite Mineral Data +

General Maufite Information

Chemical Formula:

(Mg,Ni)Al4Si3O13·4(H2O) (?)

Composition:

Molecular Weight = 505.14 gm

Magnesium 3.61 % Mg 5.98 % MgO

Aluminum 21.37 % Al 40.37 % Al₂O₃

Silicon 16.68 % Si 35.68 % SiO₂

Nickel 2.90 % Ni 3.70 % NiO

Hydrogen 1.60 % H 14.27 % H₂O

Oxygen 53.84 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Mg_0.75Ni_0.25Al₄Si₃O₁₃·4(H₂O)

Environment:

As a seam in serpentine adjacent to a diabase dike. An inadequately described species.

IMA Status:

Valid Species (Pre-IMA) 1930

Locality:

On Ruorka Ranch, 2.4 km northeast of the Umvukwe geodetic beacon, Mazoe district, Umvukwe Mountains, Zimbabwe. Link to MinDat.org Location Data.

Name Origin:

Named for Herbert Brantwood Maufe (1879-1976), director of the Geological Service of Rhodesia

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Maufite Crystallography

Crystal System:

MonoclinicSpace Group: Mono ?

Physical Properties of Maufite

Color:

Emerald green.

Density:

2.27

Diaphaniety:

Translucent

Fracture:

Regular - Flat surfaces (not cleavage) fractured in a regular pattern.

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Fibrous - Crystals made up of fibers.

Habit:

Wheat Sheaf - Bundle shaped aggregates resembling wheat sheafs after hand reaping wheat.

Hardness:

3 - Calcite

Streak:

greenish white

Optical Properties of Maufite

Optical Data:

NCalc= 1.51 - from Gladstone-Dale relationship (KC = 0.2248) where Ncalc=Dmeas*KC+1

Calculated Properties of Maufite

Electron Density:

r_electron=2.28 gm/cc
note: r_Maufite=2.27 gm/cc.

Fermion Index

Fermion Index = 0.01198
Boson Index = 0.98802

Photoelectric:

PE_Maufite= 2.50 barns/electron
U=PE_Maufite x r_electron= 5.71 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Maufite is Not Radioactive

Maufite Classification

Dana Class:

78.7.13.1 (78)Unclassified silicates

(78.7)wholly unclassified silicates

(78.7.13)Dana Group

78.7.13.1 Maufite (Mg,Ni)Al4Si3O13·4(H2O)(?) Mono ? Mono

Strunz Class:

VIII/H.27-180 VIII - Silicates

VIII/H - Phyllosilicates (layered) Mica like with [Si4O10]4- and related groups

VIII/H.27 - Serpentine group

VIII/H.27-10 Antigorite (Mg,Fe)3Si2O5(OH)4 Cm m

VIII/H.27-20 Lizardite Mg3Si2O5(OH)4 P1 1

VIII/H.27-30 Clinochrysotile Mg3Si2O5(OH)4 Cc, C 2/m Mono

VIII/H.27-40 Orthochrysotile Mg3Si2O5(OH)4 Unk Ortho

VIII/H.27-50 Parachrysotile Mg3Si2O5(OH)4 Unk Ortho

VIII/H.27-55 Caryopilite (Mn,Mg,Zn,Fe)3(Si,As)2O510(OH,Cl)4 Cm or C 2/m Mono

VIII/H.27-60 Greenalite (Fe,Fe)2-3Si2O5(OH)4 Unk Mono

VIII/H.27-70 Berthierine (Fe,Fe,Al,Mg)2-3(Si,Al)2O5(OH)4 Cm m

VIII/H.27-80 Fraipontite (Zn,Al)3(Si,Al)2O5(OH)4 Cm m

VIII/H.27-90 Zinalsite Zn2AlSi2O5(OH)4·2(H2O)(?) Mono

VIII/H.27-95 Dozyite (Mg7Al2)(Si4Al2)O15(OH)12 Cm m

VIII/H.27-100 Amesite Mg2Al(SiAl)O5(OH)4 C1 1

VIII/H.27-110 Kellyite (Mn,Mg,Al)3(Si,Al)2O5(OH)4 P 6₃ 6

VIII/H.27-120 Cronstedtite Fe2Fe(SiFe)O5(OH)4 P 3₁m 3m

VIII/H.27-140 Karpinskite (Mg,Ni)2Si2O5(OH)2(?) Unk Mono

VIII/H.27-150 Nepouite Ni3Si2O5(OH)4 Ccm21 mm2

VIII/H.27-160 Pecoraite Ni3Si2O5(OH)4 C 2/m 2/m

VIII/H.27-170 Brindleyite (Ni,Mg,Fe)2Al(SiAl)O5(OH)4 C 2 2

VIII/H.27-180 Maufite (Mg,Ni)Al4Si3O13·4(H2O)(?) Mono ? Mono

VIII/H.27-190 Carlosturanite (Mg,Fe,Ti,Mn)21(Si,Al)12O28(OH)34 Cm m

Other Maufite Information

References:

NAME( AntBidBlaNic2) PHYS. PROP.(AntBidBlaNic2)

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Maufite

(Mg,Ni)Al4Si3O13·4(H2O) (?)
Dana No: 78.7.13.1 Strunz No: VIII/H.27-180
Locality:

Notes: