|
|
 |
|||||||||||||||||
|
|||||||||||||||||
 |
|||||||||||||||||
| JOURNAL HOME | HELP | CONTACT PUBLISHER | SUBSCRIBE | ARCHIVE | SEARCH | TABLE OF CONTENTS |
Univ. Oslo, Mineral.-Geol. Mus., Oslo, Norway
Janhaugite occurs as reddish brown lamellar aggregates and sprays of crystal prisms in a soda granite (ekerite) at Gjerdingen, Nordmarka, northern Oslo region, Norway. Microprobe analyses give a formula very close to (Na,Ca) 3 (Mn,Fe) 3 (Ti,Zr,Nb) 2 Si 4 O 15 (OH,F,O) 3 . The mineral is monoclinic P2 1 /n with a 10.668(2), b 9.787(4), c 13.931(3)Aa, beta 107.82(2) degrees , Z = 4. The strongest reflections [d in Aa, (I/I 1 ), (hkl)] of the powder pattern are: 3.202(60)(310), 2.839(100)(124), 2.833(90)(322), 2.782(90)(320,105),114,231), 1.744(50)(414). The crystals have the following properties: elongated along [001], flattened on ?010
This record provided courtesy of AGI/GeoRef.
This article has been cited by other articles:
|
|
 |
|
  G. RAADE, N. V. CHUKANOV, U. KOLITSCH, S. MOCKEL, A. E. ZADOV, and I. V. PEKOV Gjerdingenite-Mn from Norway -- a new mineral species in the labuntsovite group: descriptive data and crystal structure European Journal of Mineralogy, December 1, 2004; 16(6): 979 - 987. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 G. Raade, G. Ferraris, A. Gula, and G. Ivaldi GJERDINGENITE-Fe FROM NORWAY, A NEW MINERAL SPECIES IN THE LABUNTSOVITE GROUP: DESCRIPTION, CRYSTAL STRUCTURE AND TWINNING Can Mineral, December 1, 2002; 40(6): 1629 - 1639. [Abstract] [Full Text] [PDF]
|
|
| JOURNAL HOME | HELP | CONTACT PUBLISHER | SUBSCRIBE | ARCHIVE | SEARCH | TABLE OF CONTENTS |
