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Hydroxycalciobetafite

Collectors Summary

Hardness (Mohs) 4.5
Solubility - Säuren

Chemism

Chem­ical formula

Ca2(Ti,Nb)2(O,OH)6(OH)

Chem­ical com­po­si­tion

Calcium, Niob, Titan, Sauerstoff, Wasserstoff

Unit weight: 312.9265185 u; Number of atoms in the formula: 13.5

Info

Empirical formula:

Ca2(Ti0.75Nb0.25)2(O0.75(OH)0.25)6(OH)

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.81

2.5

18.52

1.0079470

2.5198675

Oxygen

O

35.79

7

51.85

15.9994300

111.9960100

Calcium

Ca

25.62

2

14.81

40.0784000

80.1568000

Titanium

Ti

22.94

1.5

11.11

47.8671000

71.8006500

Niobium

Nb

14.84

0.5

3.70

92.9063820

46.4531910

Anal­y­sis wt%

CaO : 10.94, PbO : 1.43, MnO : 0.62, FeO : 3.44, U3O8 : 22.79, Nb2O5 : 31.06, Ta2O5 : 3.33, TiO2 : 17.50, F : 1.35, H2O : 5.88 (Ref: Canadian Mineralogist 61)

Lapis Clas­sifica­tion

IV/C.11-020

IV: OXIDE
C: Oxide mit Verhältnis Metall : Sauerstoff = 2:3 (M2O3 und ver-wandte Verbindungen)
11: Pyrochlor-Gruppe; BETAFIT-Untergruppe [Ti ± Nb]

Clas­sifica­tion by Hölzel

4.CJ.110

4: OXIDES
C: R2O3 Sesquioxides
J: Betafite-Group, Ti-dominant on the B-site

Min­eral sta­tus

Mineralstatus fragwürdig

Optical Properties

RI value α / ω / n

2.0!!

Ri mean

2.0

2V angle

Isotropisch

Crystallography

Cell param­e­ters a (Å)

10.31

Cell param­e­ters b (Å)

-

Cell param­e­ters c (Å)

-

Cell param­e­ters a/b or c/a

1.000

Cell param­e­ters c/b

-

Cell param­e­ters α

90°

Cell param­e­ters β

90°

Cell param­e­ters γ

90°

Z

8

Volumne (ų)

1095.9

Crystals 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

4.5

VHN (Hard­ness Vick­ers)

268 (100g)

Density (g/cm³)

4.15 (gemessen)

3.793 ( ρ calc. Mineralienatlas )

Insta­bil­ity

- Säuren

Related minerals "Lapis Classification" [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

'Hydroxycalciobetafite'

Ca2(Ti,Nb)2(O,OH)6(OH)

IV/C.11-020

Oxycalciobetafite

Ca2(Ti,Nb)2O6O

IV/C.11-024

'Oxyplumbobetafite'

Pb2(Ti,Nb)2O6O

IV/C.11-054

Oxyuranobetafite

(U,Ca,◻)2 (Ti,Nb)2O6O

IV/C.11-084

Related minerals "Hoelzel Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

'Hydroxycalciobetafite'

Ca2(Ti,Nb)2(O,OH)6(OH)

4.CJ.110

'Scheteligite'

(Ca,Y,Sb,Mn)2(Ti,Ta,Nb,W)2O6(O,OH)

4.CJ.121

Oxycalciobetafite

Ca2(Ti,Nb)2O6O

4.CJ.140

Panguite

(Ti4+,Sc,Al,Mg,Zr,Ca)1.8O3

orthorhombisch : mmm : Pbca

4.CJ.180

Automatic Links to external internet sources (Responsibility is with the operator)

German pages

DeWikiPedia - search for: Hydroxycalciobetafit
Google-Bilder-Suche - search for: Hydroxycalciobetafit
Mineralogisch-Petrographisches-Institut Hamburg - search for: Hydroxycalciobetafit

English pages

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RRUFF - Raman, XRD and other mineral data - search for: Hydroxycalciobetafite
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German pages

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