Carlhintzeite Mineral Data

Carlhintzeite Mineral Data

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General Carlhintzeite Information

Chemical Formula:

Ca2AlF7·(H2O)

Composition:

Molecular Weight = 258.14 gm

Calcium 31.05 % Ca 43.45 % CaO

Aluminum 10.45 % Al 19.75 % Al₂O₃

Hydrogen 0.78 % H 6.98 % H₂O

Oxygen 6.20 % O

Fluorine 51.52 % F 51.52 % F

- % F -21.69 % -O=F₂

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ca₂AlF₇·(H₂O)

Environment:

In a pegmatite.

IMA Status:

Approved IMA 1979

Locality:

Hagendorf, Germany. Link to MinDat.org Location Data.

Name Origin:

Named for Carl Hintze (1851-1916), German mineralogist, Professor of mineralogy at the University of Breslau and compiler of the "Handbuch der mineralogie."

Carlhintzeite Image

Images:

Carlhintzeite

Comments: Colorless tabular crystals of carlhintzeite on matrix.
Location: Hagendorf, Bayern, Germany. Scale: Picture size 1 mm.
© Thomas Witzke / Abraxas-Verlag

Carlhintzeite Crystallography

Axial Ratios:

a:b:c =1.3581:1:1.3323

Cell Dimensions:

a = 9.48, b = 6.98, c = 9.3, Z = 4; alpha = 91.14°, beta = 104.85°, gamma = 90° V = 594.71 Den(Calc)= 2.88

Crystal System:

TriclinicSpace Group: C1,C1

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

By Intensity(I/I_o): 3.48(1), 4.56(0.7), 3.69(0.6),

Physical Properties of Carlhintzeite

Color:

Colorless, White.

Density:

2.86

Diaphaniety:

Transparent

Habit:

Druse - Crystal growth in a cavity which results in numerous crystal tipped surfaces.

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Habit:

Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Carlhintzeite

Gladstone-Dale:

CI meas= 0.192 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.197 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1446,KPDmeas= 0.1456,KC= 0.1801

Optical Data:

Biaxial (+), a=1.411, b=1.416, g=1.422, bire=0.0110, 2V(Calc)=86, 2V(Meas)=77.

Calculated Properties of Carlhintzeite

Electron Density:

r_electron=2.79 gm/cc
note: r_{Carlhintzeite}=2.86 gm/cc.

Fermion Index

Fermion Index = 0.00045
Boson Index = 0.99955

Photoelectric:

PE_{Carlhintzeite}= 4.46 barns/electron
U=PE_{Carlhintzeite} x r_electron= 12.46 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Carlhintzeite is Not Radioactive

Carlhintzeite Classification

Dana Class:

11.6.7.1 (11)Halide Complexes; Alumino-fluorides

(11.6)with miscellaneous formulae

(11.6.7)Dana Group

11.6.7.1 Carlhintzeite Ca2AlF7·(H2O) C1,C1 Tri

Strunz Class:

III/C.03-50 III - Halogenides

III/C - Double halogenides with water, Fluorides

III/C.03 - Prosopite - Boldyrevite series

III/C.03-10 Prosopite CaAL2(F,OH)8 A2/a 2/m

III/C.03-20 Chiolite Na5Al3F14 P 4/mnc 4/m 2/m 2/m

III/C.03-30 Weberite Na2MgAlF7 I mma 2/m 2/m 2/m

III/C.03-40 Usovite Ba2CaMgAl2F14 C 2/c or Cc Mono

III/C.03-45 Karasugite SrCaAl(F,OH)7 P 2₁/c 2/m

III/C.03-50 Carlhintzeite Ca2AlF7·(H2O) C1,C1 Tri

III/C.03-55 Rosenbergite AlF3·3(H2O) P 4/n 4/m

III/C.03-60 Ralstonite NaxMgxAl2-x(F,OH)6·(H2O) F d3m 4/m 3 2/m

III/C.03-70 Neighborite NaMgF3 Pcmn 2/m 2/m 2/m

III/C.03-80 Boldyrevite* NaCaMgAl3F14·4(H2O) None

Other Carlhintzeite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

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

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Carlhintzeite

Ca2AlF7·(H2O)
Dana No: 11.6.7.1 Strunz No: III/C.03-50
Locality:

Notes: