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Oxy-dravite

A valid IMA mineral species

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Photos of Oxy-dravite (5)

Oxy-dravite Gallery Search Photos of Oxy-dravite

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Oxy-dravite

San Martino al Cimino, Viterbo, Viterbo Province, Lazio, Italy

Oxy-dravite

San Martino al Cimino, Viterbo, Viterbo Province, Lazio, Italy

Oxy-dravite

San Martino al Cimino, Viterbo, Viterbo Province, Lazio, Italy

Oxy-dravite

San Martino al Cimino, Viterbo, Viterbo Province, Lazio, Italy

Oxy-dravite

San Martino al Cimino, Viterbo, Viterbo Province, Lazio, Italy

Oxy-dravite

San Martino al Cimino, Viterbo, Viterbo Province, Lazio, Italy

Oxy-dravite

San Martino al Cimino, Viterbo, Viterbo Province, Lazio, Italy

Oxy-dravite

San Martino al Cimino, Viterbo, Viterbo Province, Lazio, Italy

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About Oxy-draviteHide

Formula:

Na(Al₂Mg)(Al₅Mg)(Si₆O₁₈)(BO₃)₃(OH)₃O

Colour:

Brown, brown-black, red-black

Lustre:

Vitreous

Hardness:

Specific Gravity:

3.073 (Calculated)

Crystal System:

Trigonal

Member of:

Tourmaline Group

Name:

For its relationship to dravite, although it is NOT an analogue of dravite (see below).

Type Locality:

ⓘ Osarara, Narok County, Kenya

Tourmaline Group.

Oxy-dravite has been used as a preliminary working name for a much-studied new member of the tourmaline group which has already appeared several times in the mineralogical literature. It was submitted and approved as a new species by the IMA in 2012.
This species is related to dravite by substitution of one OH by (ideally) one O, the altered charge balance being compensated by replacing one Mg by a trivalent Al/Fe. This different charge balance means that "oxy-dravite" is not a true analogue of dravite.

Compare also oxy-schorl.

Originally (as an unapproved species) reported from Alto Chapare District, Chapare Province, Cochabamba Department, Bolivia.

Ni-Fe³⁺-rich oxy-dravite is reported from Artana Mn deposit (Mauro et al., 2022).

Unique IdentifiersHide

Mindat ID:

10966

Long-form identifier:

mindat:1:1:10966:2

GUID
(UUID V4):

1db4127c-0779-439d-867d-81cbfb5cc43a

IMA Classification of Oxy-draviteHide

IMA status:

Approved

Approval year:

2012

First published:

2013

Classification of Oxy-draviteHide

Strunz-mindat (2024):

9.CK.05

9 : SILICATES (Germanates)
C : Cyclosilicates
K : [Si₆O₁₈]₁₂- 6-membered single rings, with insular complex anions

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Symbol	Source	Reference
Odrv	IMA–CNMNC	Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Pronunciation of Oxy-draviteHide

Pronunciation:

Play	Recorded by	Country
	Jolyon Ralph	United Kingdom

Physical Properties of Oxy-draviteHide

Lustre:

Vitreous

Transparency:

Translucent

Colour:

Brown, brown-black, red-black

Comment:

Dark red color and pleochroism likely caused by minor concentrations of Fe3+.

Streak:

Pink

Hardness:

7 on Mohs scale

Tenacity:

Brittle

Fracture:

Conchoidal

Density:

3.073 g/cm³ (Calculated)

Optical Data of Oxy-draviteHide

Type:

Uniaxial (-)

RI values:

n_ω = 1.650(5) n_ε = 1.620 - 5.000

Max Birefringence:

δ = 0.030

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Surface Relief:

Very High

Pleochroism:

Visible

Comments:

O = orange, E = pink.

Chemistry of Oxy-draviteHide

Mindat Formula:

Na(Al₂Mg)(Al₅Mg)(Si₆O₁₈)(BO₃)₃(OH)₃O

Elements listed:

Al, B, H, Mg, Na, O, Si - search for minerals with similar chemistry

Chemical AnalysisHide

Oxide wt%:

	1
SiO₂	36.18 %
TiO₂	0.36 %
B₂O₃	10.76 %
Al₂O₃	37.10 %
V₂O₃	0.03 %
Cr₂O₃	0.01 %
FeO	1.14 %
MnO	0.00 %
ZnO	0.02 %
MgO	7.84 %
CaO	0.46 %
Na₂O	2.82 %
K₂O	0.04 %
F	0.30 %
Cl	0.00 %
O=F,Cl	-0.13 %
Total:	96.93 %

Sample references:

ID	Locality	Reference	Notes
1	Beluga sapphire property, Kimmirut, Baffin Island, Qikiqtaaluk Region, Nunavut, Canada	Belley, P, et al. (2017) Origin Of Scapolite-Hosted Sapphire (Corundum) Near Kimmirut, Baffin Island, Nunavut, Canada The Canadian Mineralogist,55(4):669 http://dx.doi.org/10.3749/canmin.1700018

Crystallography of Oxy-draviteHide

Crystal System:

Trigonal

Class (H-M):

3m - Ditrigonal Pyramidal

Space Group:

R3m

Setting:

R3m

Cell Parameters:

a = 15.9273(2) Å, c = 7.2001(1) Å

Ratio:

a:c = 1 : 0.452

Unit Cell V:

1,581.81 Å³ (Calculated from Unit Cell)

Crystal StructureHide

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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure

ID	Species	Reference	Year	Locality	Temp (K)
0002240	Oxy-dravite	Bloodaxe E S, Hughes J M, Dyar M D, Grew E S, Guidotti C V (1999) Linking structure and chemistry in the schorl-dravite series Sample LCW2356 American Mineralogist 84 922-928	1999	Dunton mine, Newry, Oxford County, Maine, USA	293
0002245	Oxy-dravite	Bloodaxe E S, Hughes J M, Dyar M D, Grew E S, Guidotti C V (1999) Linking structure and chemistry in the schorl-dravite series Sample Ru-T18-92 American Mineralogist 84 922-928	1999	Rumford, Oxford County, Maine, USA	293
0020259	Oxy-dravite	Bosi F, Skogby H (2013) Oxy-dravite, Na(Al2Mg)(Al5Mg)(Si6O18)(BO3)3(OH)3O, a new mineral species of the tourmaline supergroup American Mineralogist 98 1442-1448	2013	Osarara, Narok district, Kenya	293
0020483	Oxy-dravite	Gatta G D, Bosi F, McIntyre G J, Skogby H (2014) First accurate location of two proton sites in tourmaline: A single-crystal neutron diffraction study of oxy-dravite Mineralogical Magazine 78 681-692	2014	Osarara, Narok District, Kenya	293
0020484	Oxy-dravite	Gatta G D, Bosi F, McIntyre G J, Skogby H (2014) First accurate location of two proton sites in tourmaline: A single-crystal neutron diffraction study of oxy-dravite Mineralogical Magazine 78 681-692	2014	Osarara, Narok District, Kenya	293

CIF Raw Data - click here to close

data_global
_chemical_name_mineral 'Oxy-dravite'
loop_
_publ_author_name
'Bloodaxe E S'
'Hughes J M'
'Dyar M D'
'Grew E S'
'Guidotti C V'
_journal_name_full 'American Mineralogist'
_journal_volume 84 
_journal_year 1999
_journal_page_first 922
_journal_page_last 928
_publ_section_title
;
 Linking structure and chemistry in the schorl-dravite series
 Sample LCW2356
;
_database_code_amcsd 0002240
_chemical_compound_source 'Dunton mine, Newry, Oxford County, Maine, USA'
_chemical_formula_sum 'Na.418 Ca.37 K.027 Mg2.538 Fe.549 Al6.072 Ti.036 V.009 Li.006 Cr.009 Si6 B3 O30.866 F.134 H3.018'
_cell_length_a 15.915
_cell_length_b 15.915
_cell_length_c 7.187
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 1576.491
_exptl_crystal_density_diffrn      3.112
_symmetry_space_group_name_H-M 'R 3 m'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '2/3+x,1/3+y,1/3+z'
  '1/3+x,2/3+y,2/3+z'
  'x,x-y,z'
  '2/3+x,1/3+x-y,1/3+z'
  '1/3+x,2/3+x-y,2/3+z'
  '-y,-x,z'
  '2/3-y,1/3-x,1/3+z'
  '1/3-y,2/3-x,2/3+z'
  '-x+y,y,z'
  '2/3-x+y,1/3+y,1/3+z'
  '1/3-x+y,2/3+y,2/3+z'
  '-y,x-y,z'
  '2/3-y,1/3+x-y,1/3+z'
  '1/3-y,2/3+x-y,2/3+z'
  '-x+y,-x,z'
  '2/3-x+y,1/3-x,1/3+z'
  '1/3-x+y,2/3-x,2/3+z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
NaX   0.00000   0.00000   0.25000   0.41800
CaX   0.00000   0.00000   0.25000   0.37000
KX   0.00000   0.00000   0.25000   0.02700
MgY   0.27110   0.54220   0.31960   0.50600
FeY   0.27110   0.54220   0.31960   0.18300
AlY   0.27110   0.54220   0.31960   0.36400
TiY   0.27110   0.54220   0.31960   0.01200
VY   0.27110   0.54220   0.31960   0.00300
LiY   0.27110   0.54220   0.31960   0.00200
CrY   0.27110   0.54220   0.31960   0.00300
AlZ   0.29793   0.26154   0.63120   0.83000
MgZ   0.29793   0.26154   0.63120   0.17000
SiT   0.19192   0.18999   0.01930   1.00000
B   0.10970   0.21940   0.47140   1.00000
O1   0.00000   0.00000   0.79330   0.84800
O-H1   0.00000   0.00000   0.79330   0.01800
F1   0.00000   0.00000   0.79330   0.13400
O2   0.06070   0.12140   0.50180   1.00000
O-H3   0.26490   0.13245   0.53010   1.00000
O4   0.09280   0.18560   0.09080   1.00000
O5   0.18310   0.09155   0.11150   1.00000
O6   0.19580   0.18570   0.79650   1.00000
O7   0.28530   0.28490   0.09860   1.00000
O8   0.20910   0.26960   0.45990   1.00000
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
NaX 0.01155 0.01155 0.01675 0.00577 0.00000 0.00000
CaX 0.01155 0.01155 0.01675 0.00577 0.00000 0.00000
KX 0.01155 0.01155 0.01675 0.00577 0.00000 0.00000
MgY 0.00914 0.01097 0.01649 0.00549 0.00193 0.00386
FeY 0.00914 0.01097 0.01649 0.00549 0.00193 0.00386
AlY 0.00914 0.01097 0.01649 0.00549 0.00193 0.00386
TiY 0.00914 0.01097 0.01649 0.00549 0.00193 0.00386
VY 0.00914 0.01097 0.01649 0.00549 0.00193 0.00386
LiY 0.00914 0.01097 0.01649 0.00549 0.00193 0.00386
CrY 0.00914 0.01097 0.01649 0.00549 0.00193 0.00386
AlZ 0.00510 0.00539 0.00550 0.00255 -0.00025 0.00000
MgZ 0.00510 0.00539 0.00550 0.00255 -0.00025 0.00000
SiT 0.00539 0.00510 0.00584 0.00255 0.00013 -0.00073
B 0.00770 0.01155 0.00523 0.00577 -0.00075 -0.00151
O1 0.01347 0.01347 0.00759 0.00674 0.00000 0.00000
O-H1 0.01347 0.01347 0.00759 0.00674 0.00000 0.00000
F1 0.01347 0.01347 0.00759 0.00674 0.00000 0.00000
O2 0.01251 0.00866 0.01544 0.00433 0.00025 0.00050
O-H3 0.02502 0.01347 0.00576 0.01251 0.00075 0.00038
O4 0.00866 0.01636 0.00968 0.00818 -0.00050 -0.00100
O5 0.01636 0.00731 0.01178 0.00818 0.00125 0.00063
O6 0.01010 0.01030 0.00680 0.00568 -0.00176 -0.00125
O7 0.00828 0.00780 0.01021 0.00284 -0.00125 -0.00100
O8 0.00606 0.00847 0.01282 0.00342 0.00050 0.00151

X-Ray Powder DiffractionHide

Powder Diffraction Data:

d-spacing	Intensity
6.377 Å	(44)
4.222 Å	(67)
3.983 Å	(64)
3.483 Å	(84)
2.963 Å	(100)
2.576 Å	(68)
2.041 Å	(35)
1.915 Å	(52)

Comments:

Osarara, Kenya. Data from the type description.

Geological EnvironmentHide

Paragenetic Mode(s):

Paragenetic Mode	Earliest Age (Ga)
Stage 4a: Earth’s earliest continental crust	>4.4-3.0
19 : Granitic intrusive rocks
Near-surface Processes
23 : Subaerial aqueous alteration by non-redox-sensitive fluids (see also #47)
26 : Hadean detrital minerals
Stage 4b: Highly evolved igneous rocks	>3.0
34 : Complex granite pegmatites
Stage 5: Initiation of plate tectonics	<3.5-2.5
40 : Regional metamorphism (greenschist, amphibolite, granulite facies)

Type Occurrence of Oxy-draviteHide

Type Locality:

ⓘ Osarara, Narok County, Kenya

General Appearance of Type Material:

Euhedral crystal 7x7x15 mm in size.

Place of Conservation of Type Material:

Museum of Mineralogy, Earth Sciences Department, Sapienza University of Rome, Rome, Italy, catalogue number 33066

Geological Setting of Type Material:

Quartz-muscovite schist.

Synonyms of Oxy-draviteHide

IMA2012-004a

Oxydravite

Relationship of Oxy-dravite to other SpeciesHide

Member of:

Tourmaline Group

Other Members of this group:

Adachiite	CaFe₃Al₆(Si₅AlO₁₈)(BO₃)₃(OH)₃(OH)	Trig. 3m : R3m
Alumino-oxy-rossmanite	◻Al₃Al₆(Si₅AlO₁₈)(BO₃)₃(OH)₃O	Trig. 3m : R3m
Bosiite	NaFe³⁺₃(Al₄Mg₂)(Si₆O₁₈)(BO₃)₃(OH)₃O	Trig. 3m : R3m
Celleriite	◻(Mn²⁺₂Al)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)	Trig. 3m : R3m
Chromium-dravite	NaMg₃Cr³⁺₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)	Trig. 3m : R3m
Chromo-alumino-povondraite	NaCr₃(Al₄Mg₂)(Si₆O₁₈)(BO₃)₃(OH)₃O	Trig. 3m : R3m
Darrellhenryite	Na(Al₂Li)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃O	Trig. 3m : R3m
Dravite	NaMg₃Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)	Trig. 3m : R3m
Dutrowite	Na(Fe²⁺_2.5Ti_0.5)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃O	Trig. 3m : R3m
Elbaite	Na(Li_1.5Al_1.5)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)	Trig. 3m : R3m
Ferro-bosiite	NaFe³⁺₃(Al₄Fe²⁺₂)(Si₆O₁₈)(BO₃)₃(OH)₃O	Trig. 3m : R3m
Feruvite	CaFe²⁺₃(Al₅Mg)(Si₆O₁₈)(BO₃)₃(OH)₃(OH)	Trig. 3m : R3m
Fluor-buergerite	NaFe³⁺₃Al₆(Si₆O₁₈)(BO₃)₃O₃F	Trig. 3m : R3m
Fluor-dravite	NaMg₃Al₆(Si₆O₁₈)(BO₃)₃(OH)₃F	Trig. 3m : R3m
Fluor-elbaite	Na(Li_1.5Al_1.5)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃F	Trig. 3m : R3m
Fluor-liddicoatite	Ca(Li₂Al)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃F	Trig. 3m : R3m
Fluor-rossmanite	◻(Al₂Li)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃F	Trig. 3m (3 2/m) : R3m
Fluor-schorl	NaFe²⁺₃Al₆(Si₆O₁₈)(BO₃)₃(OH)₃F	Trig. 3m : R3m
Fluor-tsilaisite	NaMn²⁺₃Al₆(Si₆O₁₈)(BO₃)₃(OH)₃F	Trig. 3m : R3m
Fluor-uvite	CaMg₃(Al₅Mg)(Si₆O₁₈)(BO₃)₃(OH)₃F	Trig. 3m : R3m
Foitite	◻(Fe²⁺₂Al)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)	Trig. 3m : R3m
Liddicoatite	Ca(Li₂Al)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)	Trig. 3m : R3m
Lucchesiite	CaFe²⁺₃ Al₆(Si₆O₁₈)(BO₃)₃(OH)₃O	Trig. 3m : R3m
Magnesio-dutrowite	Na(Mg_2.5Ti_0.5)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃O	Trig. 3m : R3m
Magnesio-foitite	◻(Mg₂Al)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)	Trig. 3m : R3m
Magnesio-lucchesiite	CaMg₃Al₆(Si₆O₁₈)(BO₃)₃(OH)₃O	Trig. 3m : R3m
Maruyamaite	K(Al₂Mg)(Al₅Mg)(Si₆O₁₈)(BO₃)₃(OH)₃O	Trig. 3m : R3m
Olenite	NaAl₃Al₆(Si₆O₁₈)(BO₃)₃O₃(OH)	Trig. 3m : R3m
Oxy-chromium-dravite	NaCr₃(Cr₄Mg₂)(Si₆O₁₈)(BO₃)₃(OH)₃O	Trig. 3m : R3m
Oxy-foitite	◻(Fe²⁺Al₂)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃O	Trig. 3m (3 2/m) : R3m
Oxy-rossmanite	◻(Li_0.5Al_2.5)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃O
Oxy-schorl	Na(Fe²⁺₂Al)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃O	Trig. 3m : R3m
Oxy-uvite	CaMg₃Al₆(Si₆O₁₈)(BO₃)₃(OH)₃O
Oxy-vanadium-dravite	NaV₃(V₄Mg₂)(Si₆O₁₈)(BO₃)₃(OH)₃O	Trig. 3m : R3m
Povondraite	NaFe³⁺₃(Mg₂Fe³⁺₄)(Si₆O₁₈)(BO₃)₃(OH)₃O	Trig. 3m : R3m
Princivalleite	Na(Mn₂Al)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃O	Trig. 3m : R3m
Rossmanite	◻(LiAl₂)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)	Trig. 3m : R3m
Schorl	NaFe²⁺₃Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)	Trig. 3m : R3m
Tsilaisite	NaMn²⁺₃Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)	Trig. 3m : R3m
UM2000-64-SiO:BFeHKMg	(K,Na)Fe³⁺₃(Mg₂Fe³⁺₄)Si₆O₁₈(BO₃)₃(OH)₃O
UM2008-52-SiO:AlBCaFFeHLiMgNa	(Ca,Na,◻)(Al,Li,Fe,Mg)₃Al₆[Si₆O₁₈](BO₃)₃(OH,O)₃(F,O)
Unnamed (F analogue of feruvite)	CaFe²⁺₃(Al₅Mg)(Si₆O₁₈)(BO₃)₃(OH)₃F
Unnamed (Pb-analogue of Fluor-liddicoatite)	Pb(Li₂Al)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃F
Uvite	CaMg₃(Al₅Mg)(Si₆O₁₈)(BO₃)₃(OH)₃(OH)	Trig. 3m : R3m
Vanadio-oxy-chromium-dravite	NaV₃(Cr₄Mg₂)(Si₆O₁₈)(BO₃)₃(OH)₃O	Trig. 3m : R3m
Vanadio-oxy-dravite	NaV₃(Al₄Mg₂)(Si₆O₁₈)(BO₃)₃(OH)₃O	Trig. 3m : R3m

Common AssociatesHide

Associated Minerals Based on Photo Data:

1 photo of Oxy-dravite associated with Oxy-schorl	Na(Fe²⁺₂Al)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃O
1 photo of Oxy-dravite associated with Dutrowite	Na(Fe²⁺_2.5Ti_0.5)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃O
1 photo of Oxy-dravite associated with Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
1 photo of Oxy-dravite associated with K Feldspar
1 photo of Oxy-dravite associated with Apatite	Ca₅(PO₄)₃(Cl/F/OH)

Related Minerals - Strunz-mindat Grouping Hide

9.CK.	Fluor-schorl	NaFe²⁺₃Al₆(Si₆O₁₈)(BO₃)₃(OH)₃F	Trig. 3m : R3m
9.CK.	Darrellhenryite	Na(Al₂Li)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃O	Trig. 3m : R3m
9.CK.	Adachiite	CaFe₃Al₆(Si₅AlO₁₈)(BO₃)₃(OH)₃(OH)	Trig. 3m : R3m
9.CK.	Bosiite	NaFe³⁺₃(Al₄Mg₂)(Si₆O₁₈)(BO₃)₃(OH)₃O	Trig. 3m : R3m
9.CK.	Dutrowite	Na(Fe²⁺_2.5Ti_0.5)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃O	Trig. 3m : R3m
9.CK.	Celleriite	◻(Mn²⁺₂Al)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)	Trig. 3m : R3m
9.CK.	Princivalleite	Na(Mn₂Al)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃O	Trig. 3m : R3m
9.CK.	Alumino-oxy-rossmanite	◻Al₃Al₆(Si₅AlO₁₈)(BO₃)₃(OH)₃O	Trig. 3m : R3m
9.CK.	Ferro-bosiite	NaFe³⁺₃(Al₄Fe²⁺₂)(Si₆O₁₈)(BO₃)₃(OH)₃O	Trig. 3m : R3m
9.CK.	Magnesio-dutrowite	Na(Mg_2.5Ti_0.5)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃O	Trig. 3m : R3m
9.CK.05	Fluor-buergerite	NaFe³⁺₃Al₆(Si₆O₁₈)(BO₃)₃O₃F	Trig. 3m : R3m
9.CK.05	Chromium-dravite	NaMg₃Cr³⁺₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)	Trig. 3m : R3m
9.CK.05	Dravite	NaMg₃Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)	Trig. 3m : R3m
9.CK.05	Elbaite	Na(Li_1.5Al_1.5)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)	Trig. 3m : R3m
9.CK.05	Feruvite	CaFe²⁺₃(Al₅Mg)(Si₆O₁₈)(BO₃)₃(OH)₃(OH)	Trig. 3m : R3m
9.CK.05	Foitite	◻(Fe²⁺₂Al)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)	Trig. 3m : R3m
9.CK.05	Liddicoatite	Ca(Li₂Al)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)	Trig. 3m : R3m
9.CK.05	Olenite	NaAl₃Al₆(Si₆O₁₈)(BO₃)₃O₃(OH)	Trig. 3m : R3m
9.CK.05	Povondraite	NaFe³⁺₃(Mg₂Fe³⁺₄)(Si₆O₁₈)(BO₃)₃(OH)₃O	Trig. 3m : R3m
9.CK.05	Schorl	NaFe²⁺₃Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)	Trig. 3m : R3m
9.CK.05	Magnesio-foitite	◻(Mg₂Al)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)	Trig. 3m : R3m
9.CK.05	Rossmanite	◻(LiAl₂)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)	Trig. 3m : R3m
9.CK.05	Tsilaisite	NaMn²⁺₃Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)	Trig. 3m : R3m
9.CK.05	Oxy-vanadium-dravite	NaV₃(V₄Mg₂)(Si₆O₁₈)(BO₃)₃(OH)₃O	Trig. 3m : R3m
9.CK.05	Oxy-rossmanite	◻(Li_0.5Al_2.5)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃O
9.CK.05	Luinaite-(OH)	NaFe²⁺₃Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)	Mon. m : Bm
9.CK.05	Fluor-elbaite	Na(Li_1.5Al_1.5)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃F	Trig. 3m : R3m
9.CK.05	Chromo-alumino-povondraite	NaCr₃(Al₄Mg₂)(Si₆O₁₈)(BO₃)₃(OH)₃O	Trig. 3m : R3m
9.CK.05	Fluor-dravite	NaMg₃Al₆(Si₆O₁₈)(BO₃)₃(OH)₃F	Trig. 3m : R3m
9.CK.05	Oxy-schorl	Na(Fe²⁺₂Al)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃O	Trig. 3m : R3m
9.CK.05	Fluor-liddicoatite	Ca(Li₂Al)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃F	Trig. 3m : R3m
9.CK.05	Unnamed (F analogue of feruvite)	CaFe²⁺₃(Al₅Mg)(Si₆O₁₈)(BO₃)₃(OH)₃F
9.CK.05	UM2000-64-SiO:BFeHKMg	(K,Na)Fe³⁺₃(Mg₂Fe³⁺₄)Si₆O₁₈(BO₃)₃(OH)₃O
9.CK.05	Oxy-chromium-dravite	NaCr₃(Cr₄Mg₂)(Si₆O₁₈)(BO₃)₃(OH)₃O	Trig. 3m : R3m
9.CK.05	Fluor-tsilaisite	NaMn²⁺₃Al₆(Si₆O₁₈)(BO₃)₃(OH)₃F	Trig. 3m : R3m
9.CK.05	Vanadio-oxy-chromium-dravite	NaV₃(Cr₄Mg₂)(Si₆O₁₈)(BO₃)₃(OH)₃O	Trig. 3m : R3m
9.CK.05	Fluor-uvite	CaMg₃(Al₅Mg)(Si₆O₁₈)(BO₃)₃(OH)₃F	Trig. 3m : R3m
9.CK.05	Vanadio-oxy-dravite	NaV₃(Al₄Mg₂)(Si₆O₁₈)(BO₃)₃(OH)₃O	Trig. 3m : R3m
9.CK.05	Maruyamaite	K(Al₂Mg)(Al₅Mg)(Si₆O₁₈)(BO₃)₃(OH)₃O	Trig. 3m : R3m
9.CK.05	Lucchesiite	CaFe²⁺₃ Al₆(Si₆O₁₈)(BO₃)₃(OH)₃O	Trig. 3m : R3m
9.CK.05	Oxy-foitite	◻(Fe²⁺Al₂)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃O	Trig. 3m (3 2/m) : R3m
9.CK.05	Oxy-uvite	CaMg₃Al₆(Si₆O₁₈)(BO₃)₃(OH)₃O
9.CK.05	Magnesio-lucchesiite	CaMg₃Al₆(Si₆O₁₈)(BO₃)₃(OH)₃O	Trig. 3m : R3m
9.CK.05	Uvite	CaMg₃(Al₅Mg)(Si₆O₁₈)(BO₃)₃(OH)₃(OH)	Trig. 3m : R3m
9.CK.05	Fluor-rossmanite	◻(Al₂Li)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃F	Trig. 3m (3 2/m) : R3m
9.CK.10	Abenakiite-(Ce)	Na₂₆Ce₆(Si₆O₁₈)(PO₄)₆(CO₃)₆(SO₂)O	Trig. 3 : R3
9.CK.15	Scawtite	Ca₇(Si₃O₉)₂CO₃ · 2H₂O	Mon. 2/m
9.CK.20	Steenstrupine-(Ce)	Na₁₄Mn²⁺₂Fe³⁺₂Ce₆Zr(Si₆O₁₈)₂(PO₄)₆(PO₃OH)(OH)₂ · 2H₂O	Trig. 3m (3 2/m) : R3m
9.CK.20	Thorosteenstrupine	(Ca,Th,Mn)₃Si₄O₁₁F · 6H₂O

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References for Oxy-draviteHide

Reference List:

forum.amiminerals.it (n.d.) http://forum.amiminerals.it/viewtopic.php?f=5&t=18142&sid=23bd492acf2b5884dc09eee8d91d27a9

http://forum.amiminerals.it/viewtopic.php?f=5&t=18862

Hawthorne, Frank C., Henrys, Darrell J. (1999) Classification of the minerals of the tourmaline group. European Journal of Mineralogy, 11 (2) 201-216 doi:10.1127/ejm/11/2/0201

Zacek, V., Fryda, J., Petrov, A., Hyrsl, J. (2000): Tourmalines of the povondraite - (oxy)dravite series from the cap rock of meta-evaporite in Alto Chapare, Cochabamba, Bolivia. Journal of the Czech Geological Society, 45(1-2), 3-12.

Novák, Milan, Povondra, Pavel, Selway, Julie B. (2004) Schorl-oxy-schorl to dravite-oxy-dravite tourmaline from granitic pegmatites; examples from the Moldanubicum, Czech Republic. European Journal of Mineralogy, 16 (2) 323-333 doi:10.1127/0935-1221/2004/0016-0323

Williams, P. A., Hatert, F., Pasero, M., Mills, S. J. (2012) New minerals and nomenclature modifications approved in 2012. CNMNC Newsletter No 14. Mineralogical Magazine, 76 (5) 1281-1288 doi:10.1180/minmag.2012.076.5.15

Čopjaková, Renata; Škoda, Radek; Vašinová Galiová, Michaela (2012): „Oxy-dravit“ z turmalinitů krkonošsko-jizerského krystalinika [„Oxy-dravite“ from tourmalinites of the Krkonoše-Jizera Crystalline Massif]. Bull. mineral.-petrolog. Odd. Nár. Muz. (Praha), 20(1), 37-46.

Bosi, F., Skogby, H. (2013) Oxy-dravite, Na(Al₂Mg)(Al₅Mg)(Si₆O₁₈)(BO₃)₃(OH)₃O, a new mineral species of the tourmaline supergroup. American Mineralogist, 98 (8) 1442-1448 doi:10.2138/am.2013.4441

Gatta, G., D, Bosi, F., McIntyre, G. J., and Skogby, H. (2014): First accurate location of two proton sites in tourmaline: A single-crystal neutron diffraction study of oxy-dravite. Mineralogical Magazine, 78, 681-692.

Pieczka, A., Ertl, A., Sęk, M., Twardak, D., Zelek, S., Szełęg, E., Giester, G. (2018): Oxy-dravite from Wołowa Góra Mt., Karkonosze massif, SW Poland: Crystallochemical and structural studies. Mineralogical Magazine, 82, 913-928.

Mauro, D., Biagioni, C., Hålenius, U., Skogby, H., Dottorini, V., Bosi, F. (2022): Nickel- and Fe³⁺-rich oxy-dravite from the Artana Mn prospect, Apuan Alps (Tuscany, Italy). Journal of Geosciences: 67: 141-150.

Skřápková, Lenka, Cempírek, Jan, Belley, Philippe M., Groat, Lee A., Škoda, Radek (2023) Physical properties and crystal structure of near end-member oxy-dravite from the Beluga occurrence, Nunavut territory, Canada. Mineralogical Magazine, 1-36 doi:10.1180/mgm.2023.59

(2023) Oxy-dravite. Handbook of Mineralogy. Mineralogical Society of America

Localities for Oxy-draviteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the

symbol to view information about a locality. The

symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed.

- This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality.

- Good crystals or important locality for species.

- World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). ~~Struck out~~ - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.


Argentina
San Luis Province Coronel Pringles Department ⓘ Pampa del Tamboreo	Henry et al. (2009)

Atlantic Ocean
Gulf of Mexico Sigsbee Abyssal Plain ⓘ Challenger Knoll	Henry et al. (in press) +1 other reference

Bolivia
Cochabamba Chapare Province Alto Chapare mining district Cristalmayu subdistrict Cristalmayu ⓘ Cristalmayu valley	Field collected by Alfredo Petrov and ... +1 other reference

Canada
Nunavut Qikiqtaaluk Region Baffin Island Kimmirut (Lake Harbour) ⓘ Beluga sapphire property	Belley et al. (2017)
Saskatchewan Athabasca Basin ⓘ McArthur River Mine	Adlakha et al. (2016)

China
Sichuan Mianyang Pingwu Co. Mount Little Xuebaoding Huya township ⓘ Pingwu beryl mine	Zhu +2 other references
Yunnan Wenshan Malipo County ⓘ Dayakou emerald mine	Zheng +2 other references

Czech Republic
Vysočina Region Třebíč District Želetava Bítovánky ⓘ Bítovánky quarries	Cempírek J. et al. (2013)
Žďár nad Sázavou District ⓘ Lavičky (Lawitschek; Lawitz)	Burianek et al. (2004)
Prosetín ⓘ Prosetín Quarry	Peter Bačík et al. (2012)

Italy
Lazio Viterbo Province Viterbo ⓘ San Martino al Cimino	in the collection of Christof Schäfer +1 other reference
Piedmont Cuneo Province Canosio Vallone della Valletta ⓘ Valletta Mine	Bosi et al. (2017)
Verbano-Cusio-Ossola Province Trontano Pizzo Marcio ⓘ Pizzo Marcio North dyke	Piccoli et al. (2007) +3 other references
Tuscany Lucca Province Vergemoli Fornovolasco ⓘ Fornovolasco metarhyolite formation	Biagioni et al. (2023)
Massa-Carrara Province Carrara Monte Brugiana north slope ⓘ Monte Brugiana manganese mineralisation (Artana Mn deposit; Monte Brugiana - La Rocchetta)	Mauro et al. (2022)

Kenya
ⓘ Kwale County	American Mineralogist Crystal Structure ... +1 other reference
Narok County ⓘ Osarara (TL)	Williams et al. (2012) +3 other references

Madagascar
Vakinankaratra Antsirabe II District Ibity Sahatany Valley ⓘ Manjaka	Gadas et al. (2023)

Mali
Kayes Region Kayes Cercle Sadiola Commune ⓘ Sadiola (Sadiola Mine)	Masurel et al. (2017)

Namibia
Khomas Region Windhoek Rural ⓘ Gurumanas	Sun (2006)

Poland
Lower Silesian Voivodeship Karkonosze County Kowary ⓘ Budniki	Sęk et al. (2022)
ⓘ Wołowa Góra	Sęk (2018)

Russia
Chukotka Autonomous Okrug Bilibinsky District Vesenniy ⓘ Peschanka Cu deposit	Mineralogy of the Peschanka porphyry copper deposit et al. (Trans. Inst. Min. Metall. B)
Chaunskii District (Chaun) Ilirney ore district ⓘ Sentyabr’skoe deposit	Nikolaev et al. (2013)
Irkutsk Oblast Lake Baikal area ⓘ Ol'khonskiye Vorota Strait (Olkhon Gate)	American Mineralogist Crystal Structure ... +1 other reference
Slyudyanka ⓘ Pereval marble quarry	Reznitskii et al. (2014)
Sverdlovsk Oblast Beryozovsky Berezovsk deposit ⓘ Uspenskaya Hill	The Canadian Mineralogist
Zabaykalsky Krai Tungokochensky District Vershino-Darasunskiy ⓘ Darasun mine	Baksheev et al. (2015)
ⓘ Talatui Au deposit	Baksheev et al. (2015)
ⓘ Teremki Au deposit	Baksheev et al. (2015)

Slovakia
Banská Bystrica Region Rimavská Sobota District Tisovec ⓘ Magnet hill	Bačík P. et al. (2015)
Košice Region Košice-okolie District Zlatá Idka ⓘ Zlatá Idka tourmalinite deposit	Bačík et al. (2022)
Spišská Nová Ves District ⓘ Hnilčík	Bačík et al. (2018)

Switzerland
Ticino Leventina Faido Chironico Valley ⓘ Sponda Alp - Pizzo Forno	Charlotte Redler et al. (2016)

USA
Connecticut Middlesex County ⓘ Haddam	American Mineralogist Crystal Structure ... +1 other reference

Oxy-dravite

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