Mindat Logo
Home Page Log In Message Board The Mindat Directory
Register Search Pages Chat Now! (6 online) Mindat Auctions

Armbrusterite

Formula:
K
 
5
Na
 
7
Mn
 
15
[(OH)
 
10
|(Si
 
9
O
 
22
)
 
4
] · 4H
 
2
O
System:MonoclinicColour:dark reddish-brown
Hardness:3½
Name:The mineral is named in honor of Thomas Armbruster (b. 1950; University of Berne) for his outstanding contribution to structural mineralogy and crystallography, especially to the study of Mn-rich minerals.
This page provides mineralogical data about Armbrusterite.

Classification of Armbrusterite

IMA status:Approved 2005
Strunz 8th edition ID:8/H.0-
Nickel-Strunz 10th (pending) edition ID:9.EG.65

9 : SILICATES (Germanates)
E : Phyllosilicates
G : Double nets with 6-membered and larger rings
mindat.org URL:http://www.mindat.org/min-28891.html
Please feel free to link to this page.

Type Occurrence of Armbrusterite

Type Locality:Kukisvumchorr Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia
General Appearance of Type Material:Occursas split, curved crystals and spherulites(~2mm diameter)
Associated Minerals at type locality:
RaiteLamprophylliteManganoneptunitePectoliteVinogradovite
CalciteMolybdeniteGalenaSphaleriteFluorite

Physical Properties of Armbrusterite

Lustre:Vitreous
Diaphaneity (Transparency):Translucent
Colour:dark reddish-brown
Streak:light-brown
Hardness (Mohs):3½
Fracture:Irregular/Uneven

Crystallography of Armbrusterite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:B2/m (B1 1 2/m) [C2/m] {C1 2/m 1}
Cell Parameters:a = 17.3335Å, b = 23.539Å, c = 13.4895Å
β = 115.069°
Ratio:a:b:c = 0.736 : 1 : 0.573
Unit Cell Volume:V 4985.4 ų
Z:2
X-Ray Powder Diffraction:
d-spacingIntensity
12.28 (100)
4.10 (10)
3.562 (10)
3.260 (18)
3.117 (13)
3.077 (54)

Optical Data of Armbrusterite

Type:Biaxial (-)
RI values: nα = 1.532 nβ = 1.560 nγ = 1.564
2V:Measured: 10° to 20°
Maximum Birefringence:δ = 0.032

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Low

Chemical Properties of Armbrusterite

Formula:
K
 
5
Na
 
7
Mn
 
15
[(OH)
 
10
|(Si
 
9
O
 
22
)
 
4
] · 4H
 
2
O
All elements listed in formula:H, K, Mn, Na, O, Si

Relationship of Armbrusterite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.EG.05Cymrite
BaAl
 
2
Si
 
2
(O,OH)
 
8
·H
 
2
O
9.EG.10Naujakasite
(Na,K)
 
6
(Fe
2+
 
,Mn
2+
 
,Ca)(Al,Fe)
 
4
Si
 
8
O
 
26
9.EG.10Manganonaujakasite
Na
 
6
(Mn
2+
 
,Fe
2+
 
)Al
 
4
Si
 
8
O
 
26
9.EG.15Dmisteinbergite
Ca[Al
 
2
Si
 
2
O
 
8
]
9.EG.20Kampfite
Ba
 
6
[(Si,Al)O
 
2
]
 
8
(CO
 
3
)
 
2
Cl
 
2
(Cl,H
 
2
O)
 
2
9.EG.25Strätlingite
Ca
 
2
Al
 
2
SiO
 
7
·8H
 
2
O
9.EG.25Vertumnite
Ca
 
4
Al
 
4
Si
 
4
O
 
6
(OH)
 
24
·3H
 
2
O
9.EG.30Eggletonite
(Na,K,Ca)
 
2
(Mn,Fe)
 
8
(Si,Al)
 
12
O
 
29
(OH)
 
7
·11H
 
2
O
9.EG.30Ganophyllite
(K,Na,Ca)
 
2
Mn
 
8
(Si,Al)
 
12
(O,OH)
 
32
·8H
 
2
O
9.EG.30Tamaite
(Ca,K,Ba,Na)
 
3-4
Mn
 
24
(Si,Al)
 
40
(O,OH)
 
112
·21H
 
2
O
9.EG.35Coombsite
K(Mn,Fe,Mg)
 
13
(Si,Al)
 
18
O
 
42
(OH)
 
14
9.EG.35Zussmanite
K(Fe,Mg,Mn)
 
13
(Si,Al)
 
18
O
 
42
(OH)
 
14
9.EG.40Franklinphilite
(K,Na)
 
4
(Mn,Zn,Mg,Fe)
 
48
(Si,Al)
 
72
(O,OH)
 
216
·6H
 
2
O
9.EG.40Lennilenapeite
K
 
6-7
(Mg,Mn,Fe,Zn)
 
48
(Si,Al)
 
72
(O,OH)
 
216
·16H
 
2
O
9.EG.40Parsettensite
K
 
1.2
Mn
 
8
(Si,Al)
 
12
O
 
26
(OH)
 
10
9.EG.40Stilpnomelane
K(Fe
2+
 
,Mg,Fe
3+
 
)
 
8
(Si,Al)
 
12
(O,OH)
 
27
9.EG.45Latiumite
K
 
2
Ca
 
6
(Si,Al)
 
11
O
 
25
(SO
 
4
,CO
 
3
)
9.EG.45Tuscanite
(K(Ca,Na)
 
6
(Si,Al)
 
10
O
 
22
[SO
 
4
,CO
 
3
,(OH)
 
2
]·H
 
2
O
9.EG.50Jagoite
(Pb,Ca)
 
3
FeSi
 
3
O
 
10
(Cl,OH)
9.EG.55Wickenburgite
CaPb
 
3
Al
 
2
Si
 
10
O
 
24
(OH)
 
6
9.EG.60Hyttsjöite
Pb
 
18
Ba
 
2
Ca
 
5
Mn
2+
2
Fe
3+
2
Si
 
30
O
 
90
Cl·6H
 
2
O
9.EG.70Britvinite
[Pb
 
7
(OH)
 
3
F(BO
 
3
)
 
2
(CO
 
3
)][Mg
 
4.5
(OH)
 
3
(Si
 
5
O
 
14
)]
9.EG.75Bannisterite
Ca
 
0.5
(K,Na)
 
0.5
(Mn,Fe,Zn)
 
10
(Si,Al)
 
16
O
 
38
(OH)
 
8
·5.5H
 
2
O

Other Names for Armbrusterite

Synonyms:
IMA2005-035
Other Languages:

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Armbrusterite

Reference List:Victor N. Yakovenchuk, Sergey V. Krivovichev, Yakov A. Pakhomovsky, Gregory Yu. Ivanyuk, Ekaterina A. Selivanova, Yury P. Men'shikov, and Sergey N. Britvin: Armbrusterite, K5Na6Mn3+Mn2+14[Si9O22]4(OH)10•4H2O, a new Mn hydrous heterophyllosilicate from the Khibiny alkaline massif, Kola Peninsula, Russia. Am. Mineral. 92, 416-423(2007)

Articles/Blogs about Armbrusterite

Internet Links for Armbrusterite

Search Engines:
  • Look for Armbrusterite on Google
  • Look for Armbrusterite images on Google
    • External Links:
  • Look for Armbrusterite on Webmineral
  • Look for Armbrusterite on Athena Mineralogy
  • Look for Armbrusterite on Wikipedia
  • Look for Armbrusterite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Armbrusterite in the Natural History Museum (London) online catalogue
    • Mineral Dealers:
  • Buy Minerals and Crystals from Crystalarium.com
  • High-end worldwide specimens & outstanding customer service
  • Search for - Armbrusterite - on e-Rocks Mineral Sales & Auctions
  • Buy minerals from Mineralium.com
  • Wright's Rock Shop - excellent mineral specimens since 1970
  • Top quality minerals from Kristalle of California
  • The Arkenstone - Fine Minerals
  • Buy fine minerals and gemstones from Pala International
  • Find Armbrusterite on www.crystalclassics.co.uk
  • Buy from David K Joyce minerals
  • Lapis Mineral Magazin
  • Mineral Classics - Worldwide Collector Quality Minerals and Gems
    • Jobs:
  • Mining & Geology Jobs

    • Page Sponsor

    Sponsorship:This page is currently not sponsored. Click here to sponsor this page.

    Localities for Armbrusterite

    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Russia
     
    • Northern Region
      • Murmanskaja Oblast'
        • Kola Peninsula
          • Khibiny Massif
    		Am. Min. 92,416-423(2007)
    Mineral and/or Locality
    Google
     
    www.mindat.org Web
    Copyright © Jolyon & Ida Ralph 1993-2008. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register.